Expired Canadian patentCanada
Catalyst recovery process
CA 1101442 A · Owner: Chem Systems, Inc. · Inventors: Sherwin, Martin B.; Hansen, Robert
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a method of removing iodine-containing compounds from the reaction product of iodine-catalyzed acetoxylation, wherein an olefin is reacted with oxygen and a carboxylic acid, and the iodine is recycled to the reactor.
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 May 19, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 19, 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.
FiledSeptember 29, 1977
GrantedMay 19, 1981
Term endedMay 19, 1998
Patent numberCA 1101442 A
Classification (IPC)C07C69/16 +1 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.