Lactone-modified, mannich base dispersant additives useful in oleaginous compositions
CA 1303777 C · Owner: Lundberg, Robert Dean · Inventors: Lundberg, Robert Dean; Gutierrez, Antonio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Poly (C5-C9 lactone) modified Mannich base adducts are made by reacting a C5-C9 lactone an, amine, an aldehyde, and a hydrocarbyl substituted hydroxy aromatic compound, e.g. a polyisobutenyl phenol which, in turn, preferably is made by reacting a polymer of a C2 to C10 monoolefin, preferably polylsobutylene, having a molecular weight of about 700 to 10,000, with a hydroxy aromatic compound. The resulting adducts are useful per se as oil soluble dispersant additives. They are also useful in fuel and lubricating oil compositions, as well as in concentrates and additive packages.
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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 June 16, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 16, 2009.
- 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.