Engine seal compatible dispersant for lubricating oils
CA 1333717 C · Owner: Ethyl Corporation · Inventors: Fenoglio, David John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dispersant composition having improved compatibility with fluorohydrocarbon-containing elastomeric engine seals, said dispersant composition comprising the reaction product obtained by reacting a C40-C250 hydrocarbyl-substituted succinic anhydride with aminoguanidine, or a basic salt thereof, at a reaction temperature of from about 155°C to about 200°C.
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 27, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 27, 2011.
- 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.