Production of detergent compositions
CA 1069013 A · Owner: Unilever Limited · Inventors: Anderson, Robert W.; Child, Terence F.; Curtis, Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Detergent compositions based on alkali metal carbonate detergency builders and containing finely divided calcium carbonate having a surface area of at least about 5 m2/g, are prepared by admixing a base powder comprising a detergent active compound and optionally at least some of the alkali metal carbonate with granules formed of the finely divided calcium carbonate and a binding agent. Granules of finely divident calcium carbonate are provided which comprise 25% to 99.5% by weight of calcium carbonate with a binding agent and which have a bulk density of 0.16 to 0.96 gm/cc.
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 January 1, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 1, 1997.
- 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.