Dibasic acids to reduce coefficient of friction in rolling oils
CA 1181390 A · Owner: Nalco Chemical Company · Inventors: Kennedy, Carl S.; Zellmann, Fred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved high-content animal fat rolling oil formulation used for cold rolling sheet steel and steel strip for tin plate is achieved by adding effective amounts of a saturated dibasic acid containing from 4-14 carbon atoms to an animal fat formulation including:, 1. refined animal fat 2. minor portions of lubricity additives 3. anti-oxidants, and, 4. emulsifiers and other additives. This improved rolling oil formulation exhibits a drastically decreased coefficient of friction when applied between two metal surfaces.
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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 January 22, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 22, 2002.
- 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.