Expired Canadian patentCanada
Silane coupling agents polyimide-mineral oxide composites
CA 1283414 C · Owner: Rajendran, Giovindasamy P. · Inventors: Tesoro, Giuliana; Uhlmann, Donald R.; Park, Chan E.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An adhesion promoter for polyimide is provided having the formula:, wherein A is, or, Ar is an aromatic group R1 is lower alkyl, R11 is OR1 or lower alkyl, R111 is hydrogen or lower alkyl.
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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 April 23, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 23, 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.
FiledDecember 29, 1986
GrantedApril 23, 1991
Term endedApril 23, 2008
Patent numberCA 1283414 C
Classification (IPC)C08L79/08 +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.