BG - Federated Register Service

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BG Patent Register

The register contains the European patents for which Bulgaria is a designated country, and a request for validation for the territory of Bulgaria arrived at the Bulgarian Patent Office (BPO). No information will be provided by the register about any patents for which no validation request has arrived in BPO, even if Bulgaria is a designated country. The deep linking link will return "Not found" for such patents.

  • Coverage: EP and Euro-PCT since 2002, when Bulgaria joined European patent.
  • Updating frequency: the register is updated from the back-office system on a daily basis, reflecting the daily operations.
  • Availability of file inspection: No.
  • URL to National patent register:
  • Availability of Deep linking to National Patent register from FRS: Yes

Contents provided via FRS

FRS data

Data provided

BG - Contents




The following status values are provided:
  • Request for EP validation received - this is the initial status assigned to a patent upon validation request receipt.
  • Formalities in progress - this status indicates that the validation procedure is in progress and/or fulfilment of any formalities required are pending.
  • Patent in force - the patent that was validated in a country and continues to be valid in Bulgaria.
  • Patent not validated - the patent has never been validated for Bulgaria; in this case no specific invalidity date can be provided.
  • Patent expired - the patent expired because it came to the end of the 20th year and the protection period for this patent is over.
  • Patent lapsed - the patent has lapsed due to one or more conditions not being fulfilled, like annual fees not paid. The date of lapsing will be provided in these cases.
  • Patent revoked - the patent has been validated, but at later stage has been revoked. The date of revocation will be provided in these cases


Application No.


The European application numbers are used, in the format "EP10152236" (without the ".X" at the end)



Publication No.


The Patent number as granted by EPO, in the format "EP2379653".





All proprietors are listed, as per the status quo at the moment of the query. The transfer of rights result in changing the proprietors and only the new ones are returned by the WEB service.



Invalidation date


Invalidation date is provided for patents that have been validated for Bulgaria, but at later stage stopped to be in force in Bulgaria for some reason. The invalidation dates are applicable for the following statuses only:

Patent revoked: the date when the patent has been revoked and stopped to be in force for Bulgaria.

Patent expired: the date when the validity period of the patent has expired.

Patent lapsed: the date when the patent lapsed due to annuities not paid in the due period.


Not in force since


It is assumed that this date is relevant only for the patents for which "Invalidation date" is relevant, and in those cases both dates are identical.


Renewal fees last  paid


 Date of last payment.


Register last updated


Corresponds to the last update date of the particular record. "Update" means any kind of data modification in the back-office system in the office.





SPC data is available and can be provided if and when it becomes a specific part of FRS, and the data format and rules are specified.

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