- 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
 
The BPO conducts formality examination of design patent applications.
yes. Designs in the same category, or belonging to the same set or combination of articles, may contain several designs in one design (this condition does not apply when the product containing or attached to the design is an ornament).
Reinstatement of priority on grounds of "due care" and "unintentional/due care" accepted.
It is protected for 10 years from the date of application, and can be renewed for 3 times, each time for 5 years, with a maximum protection of 25 years.
20 years
no
4-6 months
- via Paris Convention : 6 months from earliest priority date.
 - The way of the Hague Agreement: The Hague Agreement will automatically take effect in Bulgaria after 6 months from the registration of the Hague Agreement.
 - EU appearance route: 6 months from the earliest priority date.
 
no
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