How long is the PCT period for Bulgarian invention patent application

A novelty grace period of 6 months is available if:

• The applicant or the original right holder obviously abused the
• Exhibited by the applicant or the original right holder at an official or officially recognized exhibition

no

no

A 12-month novelty grace period is available if:

• The designer, his legal successor, or a third party arising from the information or activities of the designer or his legal successor
• Third party that harms the interests of the designer

• via Paris Convention : 12 months from earliest priority date.
• via Nationalization of PCT : 31 months from earliest priority date.

yes. For an invention with the same subject matter, the applicant may file a patent type conversion request within 2 months from the date of receiving the patent application decision, but no later than 10 years from the application date, and change the patent type from invention to utility model .

Reinstatement of priority on grounds of "due care" and "unintentional/due care" accepted.

The BPO conducts formal and substantive examinations of invention patent applications. The BPO will complete the formality examination within 1 month from the filing date, and then the BPO will verify the Certified Priority Document and its related fees, and will conduct a preliminary substantive examination and unity examination of the patent application within 3 months after the end of the preliminary examination. A patent application that has paid the search fee and publication fee is published within 18 months from the filing date/priority date, and the opposition period is 3 months from the publication date. Search reports, written opinions on patentability and third-party opinions will be conveyed to the applicant no later than 6 months after the expiration of the 3-month opposition period. Can be authorized.

20 years