- Grant fee: It will be paid together with the granted announcement fee one month after receiving the granted notice, and the payment will be doubled if it is overdue.
- Annuity: The renewal fee payment period is the corresponding date of the application date in the year, and can be paid within the last year of the current validity period. Payment can still be made within 6 months from the overdue date, subject to a penalty.
- via Paris Convention : 12 months from earliest priority date.
- via Nationalization of PCT : 31 months from earliest priority date.
- Validation of European Patent in EPO member states: 3 months from the date of European patent grant
Reinstatement of priority on grounds of "due care" and "unintentional/due care" accepted.
2-5 years
Bulgarian Patent and Trademark Office
English: Bulgarian Patent Office, abbreviation: BPO
Website: Патентното ведомство на Република България (bpo.bg)
Bulgarian Utility Model Patent Search: BPO Online - portal.bpo.bg
20 years
no
A 12-month novelty grace period is available if:
- The applicant authorizes others to use
- manifest misuse by a third party
no
no
The initial protection period is 4 years, which can be extended for two consecutive three years, and the maximum protection period is 10 years.