A lubricant useful for improving the oil separation performance of a vapor compression system
CA 2500972 C · Owner: The Lubrizol Corporation · Inventors: Rajewski, Thomas E.; Tolfa, John C.; Lilje, Kenneth C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Polymeric additives are disclosed for compressor lubricants which can reduce the tendency of the lubricant to become entrained in compressed gases and be carried forward as fine dispersed droplets in compressed gas systems such as compressed air, natural gas, and compression refrigeration systems.
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 October 1, 2003 and granted March 4, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 1, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 1, 2025.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.