Liquid hard surface detergent compositions containing specific builders
CA 2176695 A1 · Owner: The Procter & Gamble Company · Inventors: Underwood, David Charles; Masters, Ronald Anthony; Roetker, Timothy Clair
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Aqueous, liquid hard surface detergent compositions having improved cleaning and good filming/streaking characteristics contain specific polycarboxylate detergent builders at critical levels. Preferred formulas contain a zwitterionic/anionic detergent surfactant mixture at levels (e.g. from about 0.02 to about 15 %); hydrophobic solvent; alkaline material especially volatile alkaline materials comprising monoethanolamine or certain beta-amino-alkanol compounds and salt of ethylenediaminetetraacetic acid as the detergent builder in levels (e.g. from about 0.05 % to about 0.5 % by weight of the composition).
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 December 15, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 15, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 15, 2016.
- 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.