Different types of patent applications
UK patent application
The patent application/specification filled at UK IPO describing the invention fully and completely along with the best mode and complete set of claims.
Convention Application
When an applicant files the application for a patent, claiming a priority date based on a similar application filed in convention countries, it is called a convention application. You can file the application in the UK IPO within twelve months from the date of the first filing of a similar application in the convention country.
Patent Cooperation Treaty (PCT) – International Application
Patent Cooperation Treaty (PCT) is an international agreement for filing patent applications having an effect in up to 157 countries.
“PCT is administered by World Intellectual Property Organization WIPO, and it’s primary objective is to provide a system where you need to make only one patent application which would be searched by at least one International search authority and examined by at least one selected International Preliminary Examination Authority IPEA”
It is important to remember that pct does not provide the grant of patent it only facilitates a single application which would be taken from searching to examination stage centrally and which would be applicable for all the signatory countries in pct. Currently, the number of countries associated with PCT are 157.
The application is to be filed in the English language within 12 months from the date of filing in US.
PCT-National Phase Application
This is an application filed in UK IPO claiming the priority of international filing date is called PCT National Phase application. First, the international application is made as per (PCT) and then the first application, can enter the national phase in UK within 30 months from the international filing date or priority date (whichever is earlier).