Laundry detergents comprising heavy metal ion chelants
CA 2230320 A1 · Owner: Perkins, Christopher Mark · Inventors: Kellett, Patti Jean; Perkins, Christopher Mark; Gosselink, Eugene Paul
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to modified polyamines comprising polyalkyleneoxy or carboxylate-like or carboxylate-derived substituents or mixtures thereof, said polyamines are useful in laundry detergent compositions, presoak compositions or conditioning compositions for the control of dye fabric color loss or fading or for the prevention of graying or yellowing of white fabric. The present invention also relates to a method for preventing the fading of colored fabric or the build-up yellow or gray color on white fabric.
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 January 24, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 24, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 24, 2019.
- 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.