The Patent Cooperation Treaty (PCT) is an international treaty administered by WIPO that provides a unified procedure for filing patent applications in multiple countries. Concluded in 1970 and operational since 1978, the PCT has become an indispensable tool for international patent protection.
What is the PCT?
The PCT is NOT an international patent - no such thing exists. Instead, it provides:
- Centralized filing: One application, one language, one office
- Deferred costs: Up to 30/31 months to decide where to seek national protection
- International search: Prior art search by an International Searching Authority (ISA)
- Preliminary examination: Optional preliminary patentability opinion
- Standardized procedures: Same formality requirements for all designations
As of 2024, the PCT has 157 contracting states, covering most commercially significant markets. India became a PCT member on December 7, 1998. Notable non-members include Taiwan (which uses a separate filing strategy) and some smaller jurisdictions.
Strategic Advantages of PCT
When NOT to Use PCT
- Protection needed in only one or two countries - direct national filing may be more cost-effective
- Urgent protection needed - PCT adds time before grant
- Target countries are not PCT members
- Budget constraints when international phase fees exceed benefit
"Applications for the protection of inventions in any of the Contracting States may be filed as international applications under this Treaty."