Expired Canadian patentCanada
Refrigerant and a machine having a refrigerating circuit with refrigerant
CA 1293369 C · Owner: Bohnenn, Leonardus J.M. · Inventors: Bohnenn, Leonardus J.M.
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 pertains to a refrigerant containing dichlorodifluoromethane and dimethyl ether in an amount of 12-35 per cent by weight. A machine having a refrigerating circuit with such refrigerant is also claimed.
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
- Granted December 24, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 24, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 18, 1988
GrantedDecember 24, 1991
Term endedDecember 24, 2008
Patent numberCA 1293369 C
Classification (IPC)C09K5/04 +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.