Expired Canadian patentCanada
Process for extracting an aromatic hydrocarbon from a mixture containing other hydrocarbons
CA 455409 A · Owner: Universal Oil Products Company · Inventors: Bernard S. Friedman
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordRead 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
- Granted March 22, 1949. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 22, 1966.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedMarch 22, 1949
Term endedMarch 22, 1966
Patent numberCA 455409 A
Classification (IPC)C07C
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.