Piperidine compounds, the process for their preparation, and their use as stabilisers for synthetic polymers
CA 1136626 A · Owner: Ciba Specialty Chemicals Holding Inc. · Inventors: Cantatore, Giuseppe; Cassandrini, Paolo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Polymer stabilizers of Formula I are hereinafter described: These compounds are prepared by reacting N,N'-bis(polyalkyl piperidyl) alkylenediamine of formula, with a substance chosen from the group of uroa CS2, R18-CHO. The radicals R1 to R18, A and n are defined in the specification.
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 November 30, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 30, 1999.
- 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.