1,3,2-oxazaphospholidine stabilizers
CA 1295619 C · Owner: Ciba-Geigy Ag · Inventors: Odorisio, Paul A.; Hyun, James L.; Pastor, Stephen D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A-15844/+/CGC 1194, 1,3,2-Oxazaphospholidine stabilizers Abstract of the disclosure, 1,3,2-oxazaphospholidine derivatives of the formula wherein a preferred definition for R' and R2 is alkyl for R3, R4 and R5 is hydrogen or alkyl n is 1-5, A is preferably a, direct bond n-valent aliphatic hydrocarbon or a group of the formula, , R6, R7 and R8 are defined as R3 and x and y are 0-2 are, effective in stabilizing organic materials against oxidative thermal and actinic degradation, said derivatives being particularly effective as color improvers and process stabilizers in organic materials containing phenolic antioxidants.
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 February 11, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 11, 2009.
- 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.