Fabric softening composition containing chlorine scavengers
CA 2201896 C · Owner: The Procter & Gamble Company · Inventors: Swartley, Donald Marion; Trinh, Toan
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 a solid particulate or liquid rinse-added fabric softening composition containing specific chlorine scavengers. The solid particulate composition comprises from about 50 % to about 95 % by weight of the composition, of biodegradable cationic quaternary ammonium , fabric softening compound and an effective amount of chlorine scavenger selected from the group consisting of: amines; ammonium salts; amino acids but not lysine; polyamino acids; polyethyleneimines; polyamines but not , di(higher alkyl)cyclic amines nor their condensation products; polyamineamides; polyacrylamides; and mixtures thereof. The solid particulate composition further comprises from …
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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 August 8, 1995 and granted October 2, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 8, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 8, 2017.
- 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
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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.