Expired Canadian patentCanada
2,2,6,6-tetramethylpiperidinederivatives
CA 1113099 A · Owner: Ciba-Geigy Ag · Inventors: Rody, Jean
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
of Disclosure, (1) 2,2,6,6-Tetramethylpiposidine derivatives having the formula, (I), wherein:, m represents 0 1 or 2, are excellent stabilizers for, synthetic polymers.
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 24, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 24, 1998.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 29, 1979
GrantedNovember 24, 1981
Term endedNovember 24, 1998
Patent numberCA 1113099 A
Classification (IPC)C07D211/46 +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.