Expired Canadian patentCanada
Oxygen-permeable lenses
CA 1279143 C · Owner: Bausch & Lomb Incorporated · Inventors: Stoyan, Nick
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure There are provided extended-wear lenses formed by polymerizing an unsaturated organosilicon monomer system a fluoroorgano monomer, a hydrophilic monomer and a, crosslinking agent. A UV-absorbing agent is optionally present.
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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
- Granted January 15, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 15, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 28, 1986
GrantedJanuary 15, 1991
Term endedJanuary 15, 2008
Patent numberCA 1279143 C
Classification (IPC)C08F230/08 +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.