Expired Canadian patentCanada
Method of plasma treating a polymer film to change its properties
CA 1232865 A · Owner: Mobil Oil Corporation · Inventors: Collins, Gregory P.
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 method of treating a polymer film to alter its physical properties, comprising exposing the film to an ionized plasma in a vacuum environment with the ionizing gas producing one of surface etching, polymer cross-linking and coating of the film.
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
- Granted February 16, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 16, 2005.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 19, 1984
GrantedFebruary 16, 1988
Term endedFebruary 16, 2005
Patent numberCA 1232865 A
Classification (IPC)C08J7/18 +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.