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PCT application can be filed within 12 months of filing the US patent application to claim priority from your US application. Entering national stage follows the PCT international phase (after a certain period), and refers to entering national phase in any one of the countries designated in the PCT application. For example, time limit for Indian national ...


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Different countries have different rules but there is normally no problem amending PCT claims when entering the national stage. You ask about the risk of invaliding your (not yet existing) patent. If the amendments you plan result in claims that "go beyond" the original filing such that the resulting claims are not supported by the original filings ...


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I will just include the mandatory recommendation here to get a patent attorney. If your invention is worth protecting, it's worth protecting properly. Otherwise, you're just throwing money away at filing fees with little chance of getting something at the end. With that out of the way... US Non-Provisional What must a US non-provisional application include? ...


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Is it possible to file amendments for the descriptions/drawings at the same time as entering US national phase? Yes. Preliminary amendments can be filed when a PCT application enters the national phase in the US. This is apparent from 37 CFR 1.115, which provides: (a) A preliminary amendment is an amendment that is received in the Office (§ 1.6 ) on or ...


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