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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, ...


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


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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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