The PCT filing facility provides you to protect your invention with effect in several States, instead of filing several separate National and or regional Patents.

The Treaty makes it possible to seek patent protection for an invention simultaneously in each of a large number of countries by filing an "international" patent application. Such an application may be filed by anyone who is a national or resident of a Contracting State (132 Contracting States). It may generally be filed with the national patent office of the Contracting State of which the applicant is a national or resident or, at the applicant's option, with the International Bureau of WIPO in Geneva.

After filing the PCT application, the applicant has to enter the “National Phase” before the applicable time limit (i.e. 31 Months for India from the date of Priority). The applicant may file the application in the different interested foreign countries.