On Wed, 7 Feb 2001, Clarence Verge wrote:

> Patents expire.

  Good point!
 
> The US Patent above was issued Dec 10,1985. See:
> 
>http://164.195.100.11/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=/netahtml/srchnum.htm&r=1&f=G&l=50&s1='4558302'.WKU.&OS=PN/4558302&RS=PN/4558302
> I think this means it expires next year.

  From what I can gather from a quick google search, utility 
patents expire 20 years from the filing date... so if that's 
the filing date, we still have a few years before it expires. 

  There's another page I found which says "under the old 
regulations" a patent expires 15 years after filing (or the 
priority date), whatever that is.  

  Probably with some persistent searching, the answer could be 
found, but I'm off to pack more boxes.  :-/

 - Steve


Reply via email to