Expired Canadian patentCanada
Lubricant composition for fluorinated refrigerants used in compression refrigeration systems
CA 2059423 C · Owner: Cpi Engineering Services, Inc. · Inventors: Short, Glenn D.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A lubricant composition of suitable, viscosity miscible in non-chlorinated fluorinated hydrocarbon refrigerants includes polyhydric alcohol esters, such as TMP mono, and/or di-pentaerythritol esters made with, branched carboxylic acids.
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 15, 1992 and granted June 25, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 15, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 15, 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.
FiledJanuary 15, 1992
GrantedJune 25, 2002
Term endedJanuary 15, 2012
Patent numberCA 2059423 C
Classification (IPC)C10M105/38 +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.