Canadian application, no grantCanada
Process for the preparation of nitrobenzene
CA 2087224 A1 · Owner: Bertea, Leopoldo · Inventors: Prins, Roel; Kouwenhoven, Herman W.; Bertea, Leopoldo
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a process for the preparation of nitrobenzene from benzene and nitric acid, wherein catalysts are applied based on the zeolite clinoptilolite.
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 January 13, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 13, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 13, 2015.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 13, 1993
GrantedNo grant recorded
Term endedJanuary 13, 2013
Patent numberCA 2087224 A1
Classification (IPC)B01J29/70 +2 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.