Granular laundry detergent and detergent builder
CA 2126238 A1 · Owner: Smith, Kim R. · Inventors: Smith, Kim R.; Borland, James E.; Sauer, Joe D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A phosphate-free granular laundry detergent having a cleaning performance comparable to that of a premium phosphate-containing laundry detergent comprises: (A) 1-30 % by weight of a surfactant (B) 1-50 % by weight of a sodium aluminum silicate detergent builder, (C) 1-20 % by weight of sodium silicate (D) 0.1-5 % by, weight of an anti-redeposition agent and (E) 10-80 % by weight of, inorganic filler the surfactant consisting of: (1) a mixture of 20-98 % by weight of an ethoxylated fatty alcohol 1-75 % by weight , of an alkali metal or ammonium salt of an alkylbenzene sulfonate in which the alkyl group contains 10-18 carbons and 1-20 % by, weight of an amine oxide corresponding to the …
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 November 17, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 17, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 17, 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.