Non-aqueous, built liquid detergent composition and method for preparing same
CA 1135590 A · Owner: Unilever Limited · Inventors: Pritchard, Norman J.; Bus, Jan; Mohlmann, Willem M. M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to non-aqueous built liquid detergent, compositions. By a judicious choice of surfactant solvent, alkaline material and builder and the use of an at least partial-, ly hydrolyzed copolymer of maleic anhydride and ethylene or vinylmethylether, stable compositions are obtained. The method of making same requires first dissolving the copolymer in the solvent before the other ingredients are added.
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 November 16, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 16, 1999.
- 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.