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<div class="wipodas-tablabels">
<label for="tab1">What is WIPO DAS?</label>
<label for="tab2">Participating Offices</label>
<label for="tab3">Scope of Documents</label>
<label for="tab4">Unavailability</label>
<label for="tab5">Lost Codes</label>
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<label for="tab7">PCT and DAS</label>
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<!-- Panels -->
<div class="wipodas-panels">
<!-- Tab 1 -->
<div id="p1" class="wipodas-panel wipodas-acc">
<details open>
<summary>What is WIPO DAS?</summary>
<div class="acc-body">
<p>The WIPO Digital Access Service (“DAS”), available at <a href="https://www.wipo.int/das/en/">https://www.wipo.int/das/en/</a>, allows you to meet requirements for providing priority and similar documents in respect of participating Offices, without the need to obtain and send multiple certified paper copies of an application.</p>
<p>Instead, you ask the Office where you are claiming priority (“Office of Second Filing” or OSF) to download a copy of the document directly from a digital library, normally held by or on behalf of the Office where the earlier application was filed from which priority is claimed (“Office of First Filing” or OFF).</p>
</div>
</details>
<details open>
<summary>Security and Permissions</summary>
<div class="acc-body">
<p>DAS provides a secure, trusted mechanism which allows Offices both to transmit and to access unpublished documents with confidence that the transmission has been permitted by the applicant or other authorized person.</p>
<p>It is essential that users properly understand what is required to give permission for this transfer. Because the system is designed to work between pairs of Offices, which may have no other working relationship, there are steps involved, which are different from, or additional to those in other priority document exchange systems in operation between certain Offices.</p>
</div>
</details>
</div>
<!-- Tab 2 -->
<div id="p2" class="wipodas-panel wipodas-acc">
<details open>
<summary>Current Participation</summary>
<div class="acc-body">
<p>An up-to-date list of participating Offices is maintained on the WIPO DAS website at: <a href="https://www.wipo.int/das/en/news">https://www.wipo.int/das/en/news</a></p>
<p>As of November 1, 2025, there are 50 IP Offices participating in WIPO DAS. Other Offices are at various stages of preparation to join the system and are expected to join in the future.</p>
</div>
</details>
<details open>
<summary>What is WIPO DAS?<<summary>Office-Specific Information</summary>
<div class="acc-body">
<p>The participating WIPOOffice’s Digitalwebsites Accessalso Service (“DAS”), available at <a href="https://www.wipo.int/das/en/">https://www.wipo.int/das/en/</a>, allows you to meet requirements for providing priority and similar documents in respect of participating Offices, without the need to obtain and send multiple certified paper copies of an application.</p>
<p>Instead, you ask the Office where you are claiming priority (“Office of Second Filing” or OSF) to download a copy of the document directly from a digital library, normally held by or on behalf of the Office where the earlier application was filed from which priority is claimed (“Office of First Filing” or OFF).</p>
</div>provide useful DAS information relevant to that particular Office. Please see “New Office Participation” on the WIPO website for announcements and details.</p>
</div>
</details>
</div>
<!-- Tab 3 -->
<div id="p3" class="wipodas-panel wipodas-acc">
<details open>
<summary>Scope of Documents</summary>
<div class="acc-body">
<p>The service is intended for use with documents related to patents, utility models, industrial designs and trademarks.</p>
</details>
<p>At present, <detailsthe open>
service is operational for exchange of patent, utility <summary>Securitymodel and Permissions</summary>design priority documents.</p>
<div class="acc-body"></div>
</details>
<p>DAS provides a secure, trusted mechanism which allows Offices both to transmit and to access unpublished documents with confidence that the transmission has been permitted by the applicant or other authorized person.</p>
<details open>
<summary>OFF Policy Differences</summary>
<div class="acc-body">
<p>The scope of documents <p>Itwhich iscan essentialbe thatmade usersavailable properlyalso understanddepends whaton isthe requiredpolicy toof givethe permissionOffice forof thisFirst transferFiling.</p>
Because the system is designed to work between pairs of<p>Some Offices, whichwill mayallow haveany nopatent otherapplication workingfiled relationship,at theretheir areOffice stepsto involved,be whichentered areinto differentthe from,system; orother additionalOffices tooffer thosethe inservice otheronly priorityfor documenta exchangelimited systemsrange in operation between certain Offices.</p>
</div>of applications, such as those which have been filed in electronic form.</p>
</details>
</div>
<p>The relevant scope for <!-- Tab 2: Participating Offices -->
<div id="p2" class="wipodas-panel wipodas-acc">each participating Office is outlined on WIPO’s website: <a href="https://www.wipo.int/das/en/participating_offices.html">https://www.wipo.int/das/en/participating_offices.html</a></p>
<details open>
<p>The service will be extended <summary>Current Participation</summary>
<div class="acc-body">to trademarks once participating Offices have made the necessary changes.</p>
</div>
<p>An up-to-date list of participating</details>
Offices is maintained on</div>
the WIPO DAS website at: <a href="https://www.wipo.int/das/en/news">https://www.wipo.int/das/en/news</a></p><!-- Tab 4 -->
<div id="p4" class="wipodas-panel wipodas-acc">
<p>As of November 1, 2025, there are 50 IP Offices participating in WIPO DAS. Other Offices are at various stages of preparation to join the system and are expected to join in the future.</p>
</div>
</details>
<details open><details open>
<summary>System Dependencies & Queuing</summary>
<div class="acc-body">
<p>The DAS system depends on the IT systems of many different Offices, over which the International Bureau has no control.</p>
<summary>Office-Specific Information</summary>
<div class="acc-body">
<p>If a library in one Office is temporarily unavailable, requests are queued until systems are restored.</p>
<p>The participating Office’s websites also provide useful<p>This DASmay informationcause relevantdelays, toso thatit particularis Office.important Pleaseto seeregister “Newthe Officeapplication Participation”and ontake the WIPOrequired websitesteps foras announcementsearly andas detailspossible.</p>
</div>
</details>
<details open>
</details>
<summary>Impact on Retrievals & <Calendar</div>summary>
<!-- Tab 3: Documents -->
<div id="p3" class="wipodas-panel wipodas-accacc-body">
<details open>
<p>In extreme cases, the Office of Second Filing <summary>Scopemay of Documents</summary>
<div class="acc-body">
<p>The service is intended for use with documents related to patents, utility models, industrial designs and trademarks.<be temporarily unable to retrieve your application, but you should still be given an opportunity to provide a paper certified copy if needed.</p>
<p><a href="https://confluence.wipo.int/confluence/spaces/dascg/pages/1590497022/4.-+Calendar+of+network+disruptions">Network disruptions</a></p>
</div>
<p>At present, the service is</details>
operational for exchange of patent, utility model and design priority documents.</p>div>
<!-- Tab </div>5 -->
<div </details>
id="p5" class="wipodas-panel wipodas-acc">
<details open>
<summary>How <summary>OFFto Recover PolicyAccess Differences<Codes</summary>
<div class="acc-body">
<p>The scope of documents which can be made available also depends on the policy of<p>If you lose your DAS access code for an earlier application filed at CN, EP, FI, JP, KR, NZ or US, please contact the Office of First Filingwhere you filed that application.</p>
<p>Some<p>If Officesthe will allow any patent application application was filed at theiranother participating Office, to be entered into contact the system;PCT othereServices Offices offer the service onlyHelp Desk for athe limitedaccess rangecode ofto applications,be suchresent asto thosethe whiche-mail haveaddress beenyou filedregistered infor electronicDAS formpurposes.</p>
</div>
<p>The relevant scope</details>
for each participating Office</div>
is outlined on WIPO’s website: <a href="https://www.wipo.int/das/en/participating_offices.html">https://www.wipo.int/das/en/participating_offices.html</a></p><!-- Tab 6 -->
<div id="p6" class="wipodas-panel wipodas-acc">
<p>The service will be extended to trademarks once participating Offices have made the necessary changes.</p> <details open>
<summary>Step 1. Ensure that the document is available to DAS</summary>
</div><div class="acc-body">
</details>
</div>
<p>Request the Office of <!-- Tab 4: Unavailability -->
<div id="p4" class="wipodas-panel wipodas-acc">First Filing to deposit a copy of the earlier application to DAS.</p>
<details open>
<p>The exact means of doing <summary>System Dependencies & Queuing</summary>
<div class="acc-body">
this will depend on the requirements of the particular Office with which the earlier application is/was filed.</p>
<p>The DAS system depends on the IT<p>See systemsthe ofDAS manyhome differentpage Offices,at over which the International Bureau has no control.</p>
<p>If a library in one Office is temporarily unavailable, requests are queued until systems are restored<a href="https://www.wipo.int/das/en/">https://www.wipo.int/das/en/</a> and the <a href="https://www.wipo.int/pct/en/appguide/index.jsp">PCT Applicant’s Guide, Annex B</a> for the procedure to be followed at each DAS depositing Office, or contact that Office directly.</p>
<p>This<p>Links mayto causedetailed delays,instructions soprovided itby iseach importantOffice tocan registerbe the application and takefound on the requiredDAS stepswebsite asat: early as possible<a href="https://www.wipo.int/das/en/participating_offices.html">Participating Offices</a>.</p>
</div>
<p>To make an earlier </details>
PCT application filed at WIPO’s receiving <details open>
<summary>Impact on Retrievals & Calendar</summary>Office RO/IB available to DAS, refer to a separate User Guide <a href="https://www.wipo.int/das/en/documentation.html">“PCT and DAS”</a>.</p>
<div class="acc-body">
<p>In extreme cases, the Office of Second Filing may be temporarily unable to retrieve your application, but you should still be given an opportunity to provide a paper certified copy if needed.</p>
<p><a href="https://confluence.wipo.int/confluence/spaces/dascg/pages/1590497022/4.-+Calendar+of+network+disruptions">Network disruptions</a>< <p>Following your request to the Office, you will either receive an access code, or else a code which was given to you as part of the application process (for example, in the case of a USPTO application, the 4-digit confirmation number indicated on the original filing receipt) will become available for use as a DAS access code.</p>
</div>
</details>
<details </div>
<!-- Tab 5: Lost Codes -->open>
<summary>Step 2. Ask the Office of Second Filing to retrieve the document</summary>
<div idclass="p5" class="wipodas-panel wipodas-acc">
<details open>
<summary>How to Recover Access Codes</summary>
<div class="acc-body">
acc-body">
<p>The Office of Second Filing will retrieve the priority document from DAS only if you specifically request them to and indicate the access code on the application form.</p>
</div>
<p>If you</details>
lose your DAS access</div>
code for an earlier application filed at CN, EP, FI, JP, KR, NZ or US, please contact the Office where you filed that application.</p><!-- Tab 7: PCT and DAS -->
<div id="p7" class="wipodas-panel wipodas-acc">
<details open>
<summary>Using DAS <p>If the application was filed at another participating Office, contact the PCT eServices Help Desk for the access code to be resent to the e-mail address you registered for DAS purposes.</p>
</div>
</details>
</div>
<!-- Tab 6: WIPO DAS Usage overview -->
<div id="p6" class="wipodas-panel wipodas-acc">
<details open>for PCT</summary>
<div class="acc-body">
<p>You can use DAS to meet PCT priority document requirements, by requesting the International Bureau to retrieve an earlier national or regional application that has been filed with a participating Office, or an earlier international application filed with RO/AU, RO/BR, RO/CL, RO/CN, RO/DK, RO/EA, RO/ES, RO/FI, RO/IB, RO/IN, RO/MA, RO/NL and RO/SE.</p>
<summary>Step 1. Ensure<p>In thatterms theof documentgiving ispermission, availablethe to DAS</summary>
<div class="acc-body">
<p>Request the Office of First Filing to deposit a copy of the earlier application to DAS.</p>
<p>The exact means of doing this will depend on the requirements of the particular Office with which the earlier application is/was filed.
<p>See the DAS home page at International Bureau is treated like any other Office of Second Filing. Even though the International Bureau runs the core systems of DAS, it cannot access your applications for use as PCT priority documents, unless you have provided it with the access code. A separate detailed User Guide on how to use DAS for PCT purposes, named “PCT and DAS”, is available on the WIPO DAS web site at <a href="https://www.wipo.int/das/en/ and the <a href="httpsdocumentation.html">https://www.wipo.int/pctdas/en/appguide/index.jsp"> PCT Applicant’s Guide, Annex B </a> for the procedure to be followed at each DAS depositing Office, or contact that Office directly.</p>
<p>Links to detailed instructions provided by each Office can be found on the DAS website at: https://www.wipo.int/das/en/participating_offices.html</p>
<p>To make an earlier PCT application filed at WIPO’s receiving Office RO/IB available to DAS, refer to a separate User Guide “PCT and DAS”, available at https://www.wipo.int/das/en/documentation.html</p>
<p>Following your request to the Office, you will either receive an access code, or else a code which was given to you as part of the application process (for example, in the case of a USPTO application, the 4-digit confirmation number indicated on the original filing receipt) will become available for use as a DAS access code.</p>
</div>
</details>
</div>
There are essentially two steps to using the system:
Step 2. Ask the Office of Second Filing to retrieve the document
The Office of Second Filing will retrieve the priority document from DAS only if you specifically request them to and indicate the access code on the application form.
documentation.html</a>.</p>
</div>
</details>
<details open>
<summary>Steps to furnish priority documents (PCT)</summary>
<div class="acc-body">
<p>After you have taken the necessary steps with the Office of First Filing to make your priority application available via DAS, you can request the International Bureau to obtain it by marking the corresponding check-box in the Priority details of the request form PCT/RO/101 and indicating the access code in the relevant space.</p>
<p>If you filed a PCT application without DAS indications, it is also possible to provide them after filing. This can be done in the ePCT service (<a href="https://pct.wipo.int">https://pct.wipo.int</a>) as an Online Action or via the Upload Documents feature. For detailed instructions on how to use ePCT, please refer to the HELP topics accessible via the ePCT home page.</p>
</div>
</details>
</div>
</div>
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