Ask Patents is a question and answer site for people interested in improving and participating in the patent system. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Could you please tell me whether patent number US5715629 is still in force?

share|improve this question

The Application Data tab for this patent on the Public Patent Application Information Retrieval (PAIR) site ( indicates "Patent Expired Due to NonPayment of Maintenance Fees Under 37 CFR 1.362"

share|improve this answer
You can also see this information reflected on the google patents page, at the bottom. – George White Feb 10 '14 at 3:04

Your Answer


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

Not the answer you're looking for? Browse other questions tagged or ask your own question.