Re: When does a 1986 patent issue expire?

Subject: Re: Re: When does a 1986 patent issue expire?

Comments:
: : I recalled there was a 17 year term on patents. That changed in 1995, but did it apply retroactively to in-force patents, or only new issues thence-forward? : : I am specifically interested in knowing if United States Patent 4,572,812 is still covered? : : Is there a method to discover when a patent expires? : : The issue date of this patent might not represent the filing date -- which rules, the initial application filing date, or the date of USPTO approval and issuance? : : Thank you for your reply... : : Lion Kuntz : : Santa Rosa, California, USA : Dear Mr. Kuntz, : The law has been changing a lot lately. My understanding is that all patents are not alive for 20 years. : M. Arthur Auslander : Auslander & Thomas-Intellectual Property Law Since 1909 : 3008 Johnson Ave., New York, NY 10463 : 7185430266, aus@auslander.com : ELAINE's Workshop® : E arly L egal A dvice I s N ot E xpensive™ : Reality Check®

Optional Link URL:
Link Title:
Optional Image URL:

Do not disclose any details of any patent idea. See a lawyer.
Before you post a message you must agree to the Terms of Use.