Patent Cooperation Treaty (PCT) — background, objectives, salient features — Intellectual Property Rights I Notes

Patent Cooperation Treaty (PCT) — background, objectives, salient features

Imagine wanting a patent in fifty countries. Before 1970 that meant fifty separate applications, in fifty languages, with fifty sets of fees and deadlines, all within the Paris 12-month window. The Patent Cooperation Treaty replaced that chaos with a single international application — one filing that reaches the whole world at once.

What the PCT is

The Patent Cooperation Treaty (PCT), 1970 (concluded at Washington in 1970, in force from 1978) is an international treaty, administered by WIPO, that provides a unified procedure for filing patent applications to protect an invention in many countries simultaneously by a single “international application”. India became a member on 7 December 1998.

Understand the crucial limit at once: the PCT does not grant an “international patent” — no such thing exists. It streamlines the filing and search stage; the actual grant is still made by each country’s national patent office. The PCT is a procedural bridge built on top of the Paris right of priority.

Objectives of the PCT:

to simplify and make cheaper the process of seeking patent protection in several countries;
to give the applicant more time and information before committing to costly national filings;
to provide a strong international search and (optional) preliminary examination to assess patentability early; and
to foster the exchange of technical information among countries.

The salient features — the two-phase procedure:

A. The international phase

International application (single filing). One application, in one language, filed with a national/regional “receiving office” (or WIPO), designating the member States where protection may later be sought.
International search. An International Searching Authority (ISA) conducts a search and issues an International Search Report (ISR) with a written opinion on novelty and inventive step.
International publication. The application is published by WIPO (usually 18 months from the priority date).
International preliminary examination (optional). At the applicant’s request, an authority gives a preliminary, non-binding opinion on patentability.

B. The national phase

The applicant then enters the national phase in each chosen country — normally within 30 or 31 months from the priority date — where the national office examines the application under its own law and decides whether to grant the patent.

The big advantage: the applicant gets up to 30/31 months (instead of the Paris 12) and a search report before spending money on multiple national filings.

Patent Cooperation Treaty, 1970, Article 11(3): an international application which meets the filing requirements “shall have the effect of a regular national application in each designated State as of the international filing date, which date shall be considered to be the actual filing date in each designated State.”

In Simple Terms: The PCT (1970, in force 1978) lets you file one international patent application that counts in all member countries at once, get an international search report on how patentable your invention is, and delay the expensive country-by-country filings to about 30–31 months. It does not grant a world patent — each national office still decides the grant.

🧩 WORKED EXAMPLE — why file through the PCT

Facts. An inventor wants patents in twenty countries but is unsure which markets are worth the cost.

Rule. The PCT allows a single international application, an international search report, and a national-phase entry deferred to about 30/31 months.

Apply. She files one PCT application, receives the search report assessing patentability, and uses the extra ~18 months (over the Paris 12) to decide which countries justify the expense before entering the national phase.

Conclusion. The PCT gives her one filing, better information, and more time — the core practical benefits — without granting any single worldwide patent.

flowchart TD
    PCT["PCT, 1970 (in force 1978) — one international application"]:::root
    PCT --> INT["International phase"]:::leaf
    INT --> FILE["Single filing + priority date"]:::leaf
    INT --> ISR["International Search Report + written opinion"]:::leaf
    INT --> PUB["International publication (~18 months)"]:::leaf
    PCT --> NAT["National phase (~30/31 months) — each office grants"]:::leaf
    classDef root fill:#FFF8DC,stroke:#000,color:#000;
    classDef leaf fill:#E6F3FF,stroke:#1E3A8A,color:#000;

Case Laws

Novartis AG v Union of India (2013) — a global patent dispute reaching India, the kind of multi-country filing the PCT route facilitates.
Bishwanath Prasad Radhey Shyam v Hindustan Metal Industries (1979) — the novelty/inventive-step standard a PCT search report assesses internationally.

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