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Ok, so i know that once i start selling the app and it is out in the open i can't apply for a patent. I now also see there are various stages in the application process: file, search and examination.

At what point is the process started so that once i start selling i don't invalidate my own patent?

Thanks.

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1 Answer 1

The rules are different for the U.S. and almost everywhere else. In the rest of the world when a patent is applied for the claimed subject matter needs to be new compared to whatever has been known the the public. In the U.S. we have a one year grace period before your own work can be used against you. If you file in the U.S. and then disclose, you can still file a foreign application if it is done within a year. Regarding dates - only the filing date matters.

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