Expired Canadian patentCanada
Protective materials
CA 2045992 C · Owner: W.L. Gore & Associates, Inc. · Inventors: Kelly, Terri Lynn
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A material for use in fabric which has a liquid barrier layer and a noxious gas barrier layer in which the noxious gas barrier layer comprises solid particulate and a netting that protects the solid particulate.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed June 28, 1991 and granted June 17, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 28, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 28, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 28, 1991
GrantedJune 17, 1997
Term endedJune 28, 2011
Patent numberCA 2045992 C
Classification (IPC)A62D5/00 +2 more
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.