Take the 2-minute tour ×
Ask Patents is a question and answer site for people interested in improving and participating in the patent system. It's 100% free, no registration required.

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 maintance fee was actually not paid. Additionally Google Patents suggests the patent has lapsed, however I would expect the overview on the patent on uspto.gov to make some explicit mention if it has indeed expired, which is not the case, so just wished to double check whether my understanding is correct.

share|improve this question
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.