Canadian application, no grantCanada
Process for removing vinylidene chloride from 1,1-dichloro-1-fluoroethane
CA 2031982 A1 · Owner: Alliedsignal Inc. · Inventors: Yates, Stephen F.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PROCESS FOR REMOVING VINYLIDENE CHLORIDE FROM 1,1-DICHLORO-1-FLUOROETHANE, ABSTRACT, Vinylidene chloride can be substantially removed from a stream of CFC-141b over a carbon molecular sieve having a mean pore size of about 4.2 to 4.5 Angstroms.
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 December 11, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 11, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 11, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 11, 1990
GrantedNo grant recorded
Term endedDecember 11, 2010
Patent numberCA 2031982 A1
Classification (IPC)C07C17/38 +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.