Is an expired patent still relevant?

Can an expired patent still be prior art against a pending application? Yes, an expired patent is still prior art. Prior art has nothing to do with whether a prior patent is live or dead. The relevance and content of the teaching are what matters. Therefore, an expired patent is no different from, for example, a […]

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Can a Late Patent Maintenance Fee be Paid?

Is there such a thing as a patent renewal? Sort of. The US does not call them patent renewals. Instead, they are called maintenance fees. So while the US does not have patent renewals per se, a US utility patent does have has a series of payment deadlines in order to keep the granted patent […]

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