Hindered piperidine compounds useful as stabilizers for synthelic resins
CA 1282785 C · Owner: Ishii, Tamaki · Inventors: Yachigo, Shinichi; Kimura, Osamu; Ishii, Tamaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is a piperidine derivative represented by the general formula (I), (I), wherein R1 represents a hydrogen atom or a methyl group R2, represents a hydrogen atom, or a C1-C18 straight-chain or branched alkyl group, C1-C10 straight-chain or branched alkylene or alkylidene group, C3-C5 trivalent hydrocarbon residue or C5-C10 tetravalent hydrocarbon residue and n, represents an integer of 1 to 4. The piperidine derivative of the invention may be used to stabilize synthetic resins such as polyethylene, polypropylene, polyvinyl chloride polyurethane, ABS resin and the like against deterioration by the action of light.
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 April 9, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 9, 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.
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.