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Patent Filing in Bulgaria

Bulgaria is a member of both PCT and Paris Convention. Patent application can be filed in Bulgaria either by the route of PCT or by filing directly as a conventional application.

Term of patent: 20 years from the date of filing of the international application. Patent Office: Patent Office of Republic of Bulgaria/ European Patent Office


Paradigm to obtain a patent in Bulgaria:-
  • Filing of patent application
  • Publication of the application
  • Request for Examination
  • Compliance with the examiners office action
  • Acceptance (Notice of Allowance) or rejection.
  • Payment of the Issue Fees.
  • Annuities: accumulated and due within three months after the granting decision; subsequent annuities are payable after the anniversary of the filing date.
Documents required for filing of Patent Application in Bulgaria

1.PCT National Phase patent filing

  • WIPO publication
  • International search report
  • International preliminary examination report (chapter II)
  • Power of Attorney

2. Conventional patent Filing

  • complete specification
  • formal drawing, if any
  • certified copy of the priority document
  • Power of Attorney
  • Bulgaria is automatically designated states of regional patent application filed in EPO
  • Timeline for national phase entry in Bulgaria is 31 months
  • Timeline for conventional filing is 12 months from date of priority