Liquid hard surface detergent compositions containing amphoteric detergent surfactant and specific anionic surfactant
CA 2122115 C · Owner: The Procter & Gamble Company · Inventors: Masters, Ronald A.
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 an aqueous liquid, hard, surface cleaning compositions containing amphoteric/zwitterionic detergent surfactant, specific anionic surfactant cleaning, solvent, optional nonionic detergent surfactant and buffer. The, buffers can be either alkaline or acid for improved cleaning of acid sensitive soils like soap scum and/or hard water deposits. The presence of the specific anionic surfactant permits the inclusion of more of relatively hydrophobic materials like cleaning solvents, which provide improved cleaning especially under, acid conditions where some greasy/oily soils are more difficult to remove.
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 April 25, 1994 and granted January 5, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 25, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 25, 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.