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Guided answer

I have a PCT application. When and how do I enter India?

A PCT application is not a worldwide patent. To get an Indian patent you must enter the Indian national phase within 31 months of the earliest priority date.

How long is it since the earliest priority date of the PCT application?

Rule 20(4)(i): the time limit for India is thirty-one months from the priority date. Always count from the earliest priority claimed.

Educational guidance only - not legal advice. Do not rely on it. It cannot see your documents, your dates or the prior art, and those usually decide the answer. Laws, rules, forms, fees and deadlines change. Please review your situation with a qualified advocate, patent attorney or registered patent agent before you act or decide not to act.

Not sure whether this applies to your invention?

The honest answer usually needs someone to look at your actual disclosure, your timeline and the prior art. That is a conversation, not an article.