Ester lubricants
CA 1062725 A · Owner: Emery Industries · Inventors: Kardol, Arie D.; Van Der Waal, Gijsbert; Trapman, Adrianus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Improved water-emulsifiable ester lubricants for polymeric and metal materials are provided which yield stable aqueous emulsions even in the absence of emulsifying agents. The ester lubricants are obtainable from a higher molecular weight di- or polycarboxylic acid and a polyalkoxylated lower alkyl alcohol the ester being, represented by the general formula wherein R represents a C1 - C6 alkyl group R' represents a C2 -, C3 alkylene group n represents a value of from 4 - 20, R" represents d hydrocarbon group containing from 20 - 80 carbon atoms and m represents a value from 1 - 3.
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 September 18, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 18, 1996.
- 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.