- 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
- Bulgarian utility model application authorization and annual fee instructions
- Bulgarian invention patent application authorization and annual fee instructions
- How long is the application period for industrial design in Bulgaria?
- Is a Bulgarian utility model application convertible?
- How long does it take to authorize an industrial design in Bulgaria?
- Novelty grace period for utility model applications in Bulgaria
- Features of Bulgarian Utility Model Patent Application Process
- Is it possible to apply for a combined appearance for a Bulgarian industrial design application
- Features of the Bulgarian invention patent application process
- Is a Bulgarian industrial design application eligible for DAS?