Varnish-inhibiting dispersants for lubricating oils
CA 1100141 A · Owner: Exxon Research And Engineering Company · Inventors: Winans, Esther D.; Gutierrez, Antonio; Brois, Stanley J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Borated derivatives of (a) hydrocarbyl-substituted monoand bis-oxazolines obtained as a reaction product of hydrocarbylsubstituted dicarboxylic acid, ester, or anhydride for example, p?butenylsuccinic anhydride with from 1 to 2 molar equivalents of a 2,2-disubstituted-2-amino-1-alkanols such as trio-(hydroxymethyl-, amino)methane (THAM); and (b) lactone-oxazolines obtained as a reaction product of hydrocarbyl-substituted lactone carboxylic acids for, example, polybutyl lactone carboxylic acid with 2,2-disubstituted-2-, amino-1-alkanols such as tris-(hydroxymethyl)aminomethane (THAM) and, their derivatives are useful additives in lubricating oils since the sludge dispersant and/or …
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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 April 28, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 28, 1998.
- 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.