Detergent compositions containing anionic surfactants, polyhydroxy fatty acid amides and a critically selected suds enhancing agent
CA 2092561 C · Owner: The Procter & Gamble Company · Inventors: Mao, Mark H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides detergent compositions comprising one or more anionic sulfate or sulfonate surfactants: one or more polyhydroxy fatty acid amides having formula (I) wherein R1 is H, a C1-C4 hydrocarbyl, 2-hydroxy ethyl 2-hydroxy propyl, or mixtures thereof, R2 is a C5-C31 hydrocarbyl and Z is a polyhydroxyhydrocarbyl having a linear hydrocarbyl chain with at least 3 hydroxyl groups directly connected to the chain or an alkoxylated derivative thereof; and a critically selected suds enhancing agent. The present invention also provides for a method for cleaning soiled dishes by treating said dishes with the detergent compositions disclosed herein.
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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
- Filed September 25, 1991 and granted January 20, 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.