Lubricants, greases, and aqueous fluids containing additives derived from dimercaptothiadiazoles
CA 2108205 C · Owner: The Lubrizol Corporation · Inventors: Gapinski, Richard E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to the composition comprising an oil of lubricating viscosity or water and a reaction product of at least one dimercaptothiadiazole or derivative thereof; and at least one aliphatic olefin or salt of, the reaction product. These reaction products generally show an ability to improve, antiwear (including extreme pressure) and antioxidant properties in lubricants.
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 12, 1993 and granted July 1, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 12, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 12, 2015.
- 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.