Expired Canadian patentCanada
Poly-bis-triazinylimides, their preparation and their use as light stabilizers for polymers and also the polymers which have been stabilized with them
CA 1194870 A · Owner: Clariant Gmbh · Inventors: Pfahler, Gerhard; Wiezer, Hartmut
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Open the CIPO recordAbstract From the Canadian patent
Poly-bis-triazinylimides of the formula are prepared from bis-(2,4-dichloro-1,3,5-triazin-6-yl)imides and polyalkylpiperidylamines. They are used as light stabilizers for polymers.
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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 October 8, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 8, 2002.
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FiledApril 2, 1982
GrantedOctober 8, 1985
Term endedOctober 8, 2002
Patent numberCA 1194870 A
Classification (IPC)C07D251/12 +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.