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Expired Canadian patentCanada

Polyvinylalkoxysiloxanes for vulcanizing other polymers

CA 1205812 A · Owner: Union Carbide Corporation · Inventors: Petty, Herbert E.

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

Organo siloxanes which in conjunction with organic, peroxides serve as vulcanizing or crosslinking agents for polymers prepared by reacting a fatty alcohol, water and methylvinyldichlorosilane or a mixture of methylvinyldichlorosilane and dimethyldichlorosilane.

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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 June 10, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 10, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 11, 1983
GrantedJune 10, 1986
Term endedJune 10, 2003
Patent numberCA 1205812 A
Classification (IPC)C07F7/18 +2 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedMarch 11, 1983Patent grantedJune 10, 1986Term endedJune 10, 2003

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.