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No, do not refile it is not "closed" it is expired. There is a way to ask the USPTO to excuse the late payment and put the patent back into effect. It requires a petition any payment of the fees - and fast action. From the MPEP a) The Director may accept the payment of any maintenance fee due on a patent after expiration of the patent if, upon petition, ...


Thank you for replying with the approval status to patent new use of old things.


NO You are correct to question your understanding of patents if you thought it was a government stamp of approval. The patent office does not do its own research and testing on patents. Unless something is claimed to be a perpetual motion machine the scientific feasibility is not questioned. Patents are examined for novelty and obviousness. There is a ...

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