Detergent compositions containing polyhydroxy fatty acid amide and alkyl ester sulfonate surfactants
CA 2092189 C · Owner: The Procter & Gamble Company · Inventors: Murch, Bruce P.; Mao, Mark H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a detergent composition comprising at least about 1% by weight preferably at least about 3% of a, polyhydroxy fatty acid amide surfactant of formula (I) wherein R1 is H. C1-C hydrocarbyl hydrocarbyl,2-hydroxyethyl or 2-hydroxy propyl,R2, is C7-C31 hydrocarbyl and Z is polyhydroxyhydrocarbyl having a linear hydrocarbyl chain with at least three hydroxyls directly connected to the chain, or alkoxylated derivatives thereof; and at least about 1% by weight preferably at least about 3, %, of an alkyl ester sulfonate surfactant of formula (II) wherein R3 is C8-C20 hydrocarbyl R4 is C1-C6 hydrocarbyl and M is, a soluble salt-forming cation.
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
- Filed September 25, 1991 and granted August 18, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 25, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 25, 2013.
- 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.