Detergent compositions containing polyhydroxy fatty acid amide surfactants and a clay softening sytem
CA 2113067 C · Owner: The Procter & Gamble Company · Inventors: Convents, Andre C.; Pretty, Alastair J.; Busch, Alfred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Detergent compositions are disclosed, comprising a polyhydroxy fatty acid amide surfactant of formula (I) wherein R1 is, H, C1-C4 hydrocarbyl, 2-hydroxy ethyl 2-hydroxy propyl or a mixture thereof, R2 is C5-C31 hydrocarbyl and Z is a polyhydroxyhydrocarbyl having a linear hydrocarbyl chain with at least 3 hydroxyls connected directly to said chain or, alkoxylated derivatives thereof and a clay-softening system.
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 June 24, 1992 and granted December 16, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 24, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 24, 2014.
- 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.