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Bulgarian PCT national phase entry

from 1104.00
Total Number of Claims/PCT
Number of Independent Claims
Number of Priorities
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  • Patent fees

Fees associated with Bulgarian PCT national phase entry as well as other patent fees are available in the fee calculator.

  • Deadline for PCT national phase entry in Bulgaria

The time limit for entering the national phase of PCT in Bulgaria is 31 months from the priority date. The restoration of this term is not possible.

  • Filing requirements in Bulgaria

The official language of the Bulgarian patent applications is Bulgarian. If the patent application is filed in any other foreign language, the date of application should be maintained if translation into Bulgarian is provided within three months from the filing date of the application. This term cannot be extended.

To obtain the date of filing a PCT national phase patent application in Bulgaria should contain:
- a request to grant a patent;
- applicant's and inventor's details;
- materials that appear to be a description of an invention;
- proof of payment of the corresponding fees.

The legalisation or notarization of a Power of Attorney is not required. A signed and stamped copy of POA should be submitted within 3 months from the deficiency notification from BPO.

  • Examination of a PCT national phase patent application in Bulgaria

The Bulgarian patent applications are subject to substantive examination. A request for substantive examination is made at the time of filing by paying the prescribed fee for study and expertise.

  • Novelty grace period

The novelty of the invention is not disproved if the information about the invention was disclosed exhibiting the invention at an official or officially recognised exhibition or if it is a consequence of obvious misuse within 6 months before the filing date or the priority date (if the priority is claimed). The applicant must declare the exhibiting of the invention upon submitting the application and present proofs for this three months after the date of submitting the application.

  • Grant, validity term and maintenance fees

The annual patent fees till the taking of decision for issuing of a patent and the fee for the current patent year shall be paid simultaneously with the fees for issuing of a patent and for publication about the issuing of the patent. The validity term of patents in Bulgaria is 20 years from the international filing date. This term can be extended by a maximum to 25 years if Supplementary protection certificate (SPC) has been applied for and subsequently granted for patents concerning pharmaceutical and plant protection products.

Maintenance fees shall be annually paid to the Bulgarian Patent Office in respect of each patent year, starting from the international filing date of the Bulgarian patent application, during the term of the granted Bulgarian patent. The annual patent fees may be paid in advance at latest on the last day of the month in which expires the previous patent year. Late payment is possible within 6 months grace period by paying a corresponding surcharge.

  • Duration of registration procedure

It takes an average of 2-5 years from filing up to grant of a patent in Bulgaria.

  • Utility Model

It is possible to enter the national phase of a PCT application as a utility model, that is subject to formal examination only. Methods, chemical compounds and use of a product are not protectable. The validity period of a utility model is 4 years with the option for two renewals, each lasting 3 years, up to a maximum total of 10 years. The procedure of obtaining utility model protection takes approximately 2-6 months.

  • Representation by a patent attorney

An applicant who is not established in the Republic of Bulgaria, another Member State of the European Union, a state party to the European Economic Area Agreement, or the Swiss Confederation, shall be obliged to perform the national phase entry of a PCT application in Bulgaria through a lawyer or an industrial property representative.

  •  Notes

1. Online Databases: Bulgarian Patents, European Patents (EPO) Search.
2. The PCT application in Bulgaria may be nationalised via registration of the European patent and its further validation in Bulgaria.

Please contact us if the above information is not in conformity with Bulgarian IP Laws