＜Regular maintenance time information＞
・[Some service outages]The Patent and utility model document inquiries will be unavailable from 21:00 on Fri, Sep 11, 2026, to 9:00 on Sun, Sep 13, 2026 (planned).
Due to scheduled system maintenance, the Patent and utility model document inquiries will be unavailable during the following period.
From 21:00 on Fri, Sep 11, 2026, to 9:00 on Sun, Sep 13, 2026 (planned).
(The service will resume as soon as the maintenance work is completed.)
Please note that the maintenance schedule may be changed.
We apologize for any inconvenience this may cause you.
・[Some service outages]Patent/Utility model Search function will not be available from 21:00(JST) Jun 2(Fri) 2026 - 9:00(JST) Jun 4(Sun) 2026(planned).
In the following period, Patent/Utility model Search function services will not be available due to maintenance.
From 21:00(JST) Jun 2 (Fri) 2026 - 9:00(JST) Jun 4(Sun) 2026(planned).
(The service can be used as soon as the maintenance work is completed.)
In addition, keep in mind that the service stop scheduled day and time may be changed.
■One Portal Dossier (OPD) Search
All OPD Services
In the following hours, all OPD services are not available.
- Sunday 8:00 am to Sunday 9:00 am
Family information services
In the following hours, only the case of which the document number has been entered
are displayed.
- 1:00 pm to 2:00 pm Tuesday and Thursday（Summer time period 0:00 am to 1:00 am）
- 1:00 pm to 1:15 pm Monday through Saturday（Summer time period 0:00 pm to 0:15 pm）
- 1:00 pm to 2:00 pm Sunday（Summer time period 0:00 pm to 1:00 pm）
Service suspension time of the foreign patent office
In the following hours, the dossier information of the foreign patent office is not
available.
-EPO Sunday 2:00 pm to 7:00 pm（Summer time period 1:00 pm to 6:00 pm）
-MOIP Sunday 0:00 am to 10:00 am
-CNIPA Saturday 1:00 am to Monday 1:00 am
-TIPO 10:00 pm to 10:59 pm Monday through Friday
*Anyway it is also JST.
Summer time period is from 10:00am on the last Sunday in March to 10:00am on the last Sunday in October.
*The dossier information of each country may not be available due to the occasional
maintenance of the provided system in each country.