Amphoteric surface active agents
CA 1073309 A · Owner: G A F Corporation · Inventors: Nehmsmann, Louis J.; Verdicchio, Robert J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Complex phosphate ester surfactants derived from a quaternary dihydroxy compound having the formula: X-, wherein R and R1 represent the same or different alkyl moieties containing 1 to 22 carbon atoms the sum of R and, R1 not being less than 7 carbon atoms; R2 and R3 each represent H or CH3; n is an integer having an average value of from 1 to 50; X is an anion of halogen sulfate, or, alkyl sulfate; and wherein the resultant complex phosphate ester contains at least 1/3 P atom per mole of quaternary dihydroxy compound; can be made through reaction of such dihydroxy quaternary compound with a conventional phosphating agent such as P2O5, polyphosphoric acid or POC13, to form interesting …
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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 March 11, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 11, 1997.
- 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.