Expired Canadian patentCanada
Catalyst and process for making aniline from phenol
CA 2095548 C · Owner: Schutz, Alain A. · Inventors: Cullo, Leonard A.; Schutz, Alain A.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Phenolic compounds, particularly phenol are aminated by reaction with ammonia in the presence of a catalyst made by, calcining bayerite.
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
- Filed August 12, 1992 and granted December 25, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 12, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 12, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 12, 1992
GrantedDecember 25, 2001
Term endedAugust 12, 2012
Patent numberCA 2095548 C
Classification (IPC)C07C211/45 +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.