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1answer
51 views

Patent issued in USA only, infringing patent issued in Germany

My patent was filed as an EPO originating in the USA and it took almost five years to prosecute. It has ultimately resulted in award of USA patent only. Two questions... 1) is there any jurisdiction ...
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0answers
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Is U.S. Patent No. 5,637,320 expired? [duplicate]

Is the above patent currently expired? If not, when does it expire? If so, is there a continuation patent? If so, when does it expire?
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3answers
52 views

Can a patent filed more than 20 years ago still be valid?

I'm asking in particular about this patent. The filing year was 1991, so it is currently 23 years old. However, the fee status says "paid." Google Patents also does not mention anything about that ...
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1answer
43 views

Know that Patent expired or not [duplicate]

I had designed a similar invention like the Patent US5,934,963 but have found this patent was already in force. It seems to have lapsed and been re-instated several times... Can you determine the ...
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0answers
21 views

Has us6072466 expired due to non-payment?

I have checked uspto.gov and looking up the paying of the maintenance fees gives No fees paid for selected year - MF Stmt unavailable Which I am not sure is an error or whether it means the ...
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1answer
44 views

Expired patent - non-payment

hypothetical question. Let's assume someone else's patent has expired due to non-payment, and we release a product that that would potentially have infringed on it. Three months later they see our ...