Expired Canadian patentCanada
Process for the preparation of pivalonitrile
CA 1192577 A · Owner: Bayer Aktiengesellschaft · Inventors: Hausser, Friedrich; Schwarz, Hans-Helmut; Hagedorn, Ferdinand
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the preparation of pivalonitrile comprising contacting pivalic acid with ammonia in the gas phase at a temperature of about 300-500°C in the presence of an aluminum oxide catalyst.
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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 27, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 27, 2002.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 29, 1983
GrantedAugust 27, 1985
Term endedAugust 27, 2002
Patent numberCA 1192577 A
Classification (IPC)B01J21/02
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.