Stabilization systems for polyacetals
CA 1338092 C · Owner: Ciba-Geigy Ag · Inventors: Capocci, Gerald A.; Zappia, Jean M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a blend of:, (a) a phenolic antioxidant such as a compound of the formula R1X(CaH2a)-Q, in which R1 represents, in which X represents oxygen or sulfur a is an integer from 6, to 30, b is an integer from 0 to 6 R2 and R3 are independently, C1-C18 alkyl C5-C12 cycloalkyl, phenyl or C7-C9 aralkyl and R2 may also be hydrogen, Q is hydrogen or A-(CyH2y)-R4 A is oxygen, sulfur or -N-, y is an integer from 2 to 20 B is C1-C4 alkyl or, C1-C4 alkanoyl and R4 is hydrogen hydroxy, C1-C4 alkanoyloxy or a, group of the formula wherein R2, R3 and b is as defined above; and (b) a hydrazine compound such as a compound of the formula in which R12 is a group such as C1-C18alkyl C1-C18 …
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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 February 27, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 27, 2013.
- 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.