Expired Canadian patentCanada
Isomer mixture of novel bicyclic phosphinic acid chlorides, and process for making it
CA 1306756 C · Owner: Hoechst Aktiengesellschaft · Inventors: Weferling, Norbert
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Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Of NOVEL BICYCLIC PHOSPHINIC ACID CHLORIDES AND PROCESS FOR MAKING IT, ABSTRACT OF THE DISCLOSURE A novel isomer mixture consists of 9-chloro-9-oxo-9phosphabicyclo-3.3.1-nonane and 9-chloro-9-oxo-9-phosphabicyclo-4.2.1-nonane.
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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 August 25, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 25, 2009.
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FiledNovember 9, 1987
GrantedAugust 25, 1992
Term endedAugust 25, 2009
Patent numberCA 1306756 C
Classification (IPC)C07F9/34 +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.