We updated this page in September 2026 to make it easier to track service interruptions. Notices now show when an issue was resolved, and notices dating back to July 2026 are available under the Archived notices tab.
This page is updated during the Canadian Intellectual Property Office (CIPO)'s business hours (Monday to Friday, 8:30 am to 4:30 pm (ET)) with service interruptions affecting our website and online services.
We consider client impact, service availability and expected duration when deciding whether to publish a notice. If an issue is not listed, please consider using our report a technical problem form.
Active notices
Service interruption – Canadian Patents Database (Ongoing)
Due to a significant increase in illegitimate automated traffic to the Canadian Patents Database (CPD), users may experience issues when attempting to access the CPD.
If you're unable to access the CPD, we recommend the following workarounds:
- Clear your browser cache
- Use a different browser
- Try this direct link to the CPD search options page
- Use a search engine (e.g. Google) to access the CPD
Alternatively, if you wish to search specifically by application or patent number, this feature is also available in MyCIPO Patents under "Search applications or patents". Note that an account is required to log in to the portal.
We are actively working to resolve this issue. We apologize for any inconvenience this may cause. For more information, please contact our Client Service Centre.
Last updated:
Planned business closures (list of holidays)
CIPO is closed for business on the following days: Closed for business dates.
Weekly planned interruptions
CIPO carries out weekly maintenance on our website and online services. Please note that these activities may affect access during the periods listed in the following table.
| Day(s) | Time period (ET) | Impact |
|---|---|---|
| Wednesdays | 7 am to 9 am | MyCIPO Patents may be unavailable. |
| Saturdays | 5 pm to 7 pm | Our IP databases (e.g. Canadian Trademarks Database) may be unavailable. |
| Saturdays (Overnight to Sunday) | 6 pm (Sat.) to 9 am (Sun.) | Our website may experience disruptions. |
| 6 pm (Sat.) to 4 pm (Sun.) | Our Canadian Patents Database may experience disruptions. | |
| Sundays | 12:30 am to 12 pm |
MyCIPO Patents will be unavailable. Other e‑commerce applications may also be unavailable during this time. |
| 2 am to 6 am | CIPO's online forms (e.g. Feedback Form) may be unavailable. |
Archived notices
Important Unless a time period extension is provided, filing deadlines continue to apply during a service interruption. For date-sensitive correspondence, review our correspondence procedures and use an available method to meet your deadline.
Should an interruption result in a time period extension, we will publish a notice online and notify CIPO news subscribers. For more info, consult our Time period extensions resulting from office closures page.
This archive includes resolved service and website interruption notices starting in July 2026.
: Scheduled maintenance – MyCIPO Patents
Due to scheduled maintenance, MyCIPO Patents will be unavailable on Sunday, , from 12:30 am to 6 pm (ET).
The regular Sunday maintenance window for MyCIPO Patents is from 12:30 am to noon; however, for , it has been extended until 6 pm.
Last updated: – Resolved
: Scheduled maintenance – MyCIPO Patents
Due to scheduled maintenance, the MyCIPO Patents portal will be unavailable from 7 am to 9 am (ET) on Thursday, .
Last updated: – Resolved
: Service interruption – MyCIPO Patents
Due to technical problems, the MyCIPO Patents portal is currently unavailable. We hope to restore access as soon as possible. .
Last updated: − Resolved
: Scheduled maintenance – MyCIPO Patents
Due to scheduled maintenance, the MyCIPO Patents portal will be unavailable from 7 am to 8 am (ET) on Thursday, .
Last updated: − Resolved
: Temporary service disruption – PCT international applications
Due to a temporary technical issue with ePCT.ZG1 files, the Canadian Intellectual Property Office (CIPO), acting as the Receiving Office (RO/CA), is currently unable to receive Patent
Cooperation Treaty (PCT) international applications through its electronic filing system PCT e-filing.
Until this issue is resolved, applicants may submit their PCT international applications by:
- Filing directly with the International Bureau as Receiving Office (RO/IB): visit WIPO's PCT eServices web page
- Fax: 819-953-OPIC (6742) or 819-953-CIPO (2476)
- Regular mail or in person
Applicants approaching a filing deadline should consider using one of the alternative filing methods listed above to avoid any risk of missing a time limit. We apologize for the inconvenience and are working to restore service as quickly as possible. Updates will be posted on this page as they become available.
Last updated: – Resolved
: Service interruption – MyCIPO Patents and CPD
Due to technical problems, the MyCIPO Patents portal and the Canadian Patents Database is currently unavailable. We hope to restore access as soon as possible.
Last updated: – Resolved
: Service interruption – Trademark e-commerce applications
The trademark e-filing service will be unavailable from noon to 12:30 pm (ET) in order to resolve an issue impacting confirmation notices.
Last updated: – Resolved
: Service interruption – TM confirmation notices
Due to technical issues, some users may not receive a confirmation notice after completing a transaction. Our team is aware and actively working to resolve the issue.
Last updated: – Resolved
: Scheduled maintenance – CIPO e-services and Canadian Patent Database
Due to scheduled maintenance, all CIPO e-services and the Canadian Patent Database will be unavailable on Saturday, August 15, from 10 am to 8 pm (ET).
Last updated: − Resolved
: Service interruption – MyCIPO Patents
Due to technical problems, the MyCIPO Patents portal is currently unavailable. We hope to restore access as soon as possible.
Last updated: − Resolved
: Scheduled maintenance – MyCIPO Patents
Due to scheduled maintenance, the MyCIPO Patents portal will be unavailable from 7 am to 8 am (ET) on Monday, August 10, 2026.
Last updated: − Resolved
: Service interruption – Canadian Patents Database
Due to an unforeseen issue, it's currently not possible to search the Canadian Patents Database. Our team is actively working to resolve the issue. As of Friday, August 7, service is expected to be restored this evening.
Last updated: − Resolved
: Service interruption – All e-commerce applications
Due to technical problems, all e-commerce applications are currently unavailable.
Last updated: − Resolved
: Service interruption – Examiner telephone outage
Due to an ongoing outage, telephone services to contact CIPO examiners are temporarily unavailable.
Last updated: − Resolved
: Scheduled maintenance – CIPO e-services
Due to scheduled maintenance, all CIPO e-services will be unavailable on Saturday, July 11, from 8 am to 6 pm (ET).
Last updated: − Resolved
: Service interruption – Certain e-services
Due to technical issues, some of our e-services may be experiencing intermittent instability or may be temporarily unavailable.
Last updated: − Resolved