A detergent composition
CA 2261944 A1 · Owner: The Procter & Gamble Company · Inventors: Vermote, Christian Leo Marie; Hall, Robin Gibson
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A detergent composition comprising a detergent surfactant a dicarboxylic acid , source and an alkaline source wherein said dicarboxylic acid source and alkaline source are capable of reacting together to produce a gas; said dicarboxylic acid source has an effervescence optimum index (EOI) of 4.00 where EOI = MW x HI x 10.2-pKa1-1 x 10.2-pKa2-1; MW = molecular weight of the dicarboxylic acid of the acid source; HI = hydrophobicity index = ratio of the number of carbon atoms in the chemical formula of the dicarboxylic acid of the acid source : number of oxygen atoms in the chemical formula of the dicarboxylic acid of the acid source; pKa1 is the logarithm of the reciprocal of the …
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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 July 23, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 23, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 23, 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.