Expired Canadian patentCanada
Process for the production of phosphite chlorides
CA 1082218 A · Owner: Ciba-Geigy Ag · Inventors: Mazour, Zdenek
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, Process for the production of phosphite chlorides comprising the reaction of phosphorus trichloride and a trialkyl phosphite or a triphenyl phosphite in the presence of an aprotic solvent.
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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 July 22, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 22, 1997.
- 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 27, 1976
GrantedJuly 22, 1980
Term endedJuly 22, 1997
Patent numberCA 1082218 A
Classification (IPC)C07F9/14
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.