Expired Canadian patentCanada
Heat-latent, cationic polymerization initiator and resin compositions containing the same
CA 1329607 C · Owner: Tanabe, Hisaki · Inventors: Nakae, Yasuhiko; Endo, Takeshi; Takagawa, Ryozo
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Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Benzyl pyridinium or ammonium salts of a nonnucleophilic anion are useful as a cationic polymerization initiator having a heat latency. A variety of resinous compositions containing this initiator is also disclosed.
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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 May 17, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 17, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 26, 1989
GrantedMay 17, 1994
Term endedMay 17, 2011
Patent numberCA 1329607 C
Classification (IPC)C07D213/04 +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.