Rapid curing poly (ether-amide) process
CA 1292833 C · Owner: Ashland Oil, Inc. · Inventors: Tiba, Omar; Goel, Anil B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for preparing copolymers of a mixture of a bis-oxazoline and a polyphenolic compound at improved rate of copolymerization by the inclusion of a catalytic amount of a carbonium ion salt of the formula Ph3CX wherein Ph represents a phenyl group and X represents BF4 PF6, SbF6, AsF6, BPh4 or ClO4, is described.
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 December 3, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 3, 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.