Cleaning compositions
CA 1055801 A · Owner: Reckitt And Colman Products Limited · Inventors: Hotchkin, Peter; Fox, Rodney T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Aqueous cleaning compositions for metal surfaces particularly copper and brass surfaces contain a soap produced by the reaction of a fatty acid with a weak base an abrasive, material and a thiosulphate dithionite or phosphite salt. The presence of the thiosulphate dithionite or phosphite, salt causes the composition to form a thin film of liquid on the metal surface which does not rapidly break up into droplets. A thickening and/or suspending agent may be present. -1-
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
- Granted June 5, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 5, 1996.
- 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.