Detergents containing oxyalkylated, carboxyl-containing polymers
CA 1303452 C · Owner: Raubenheimer, Hans-Juergen · Inventors: Denzinger, Walter; Mueller, Josef; Hartmann, Heinrich
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
21 - O.Z. 0050 39076, Abstract of the disclosure: Detergents which contain from 0.01 to 20 % by weight of oxyalkylated carbonyl-containing, polymers can be prepared by reacting. (A) a polymer which contains as copolymerized units, one, or more monoethylenically unsaturated C3-C6-carboxylic acids with, (B) ethylene oxide, propylene oxide n-butylene oxide, isobutylene oxide or a mixture of these in an aqueous, medium at up to 150°C.
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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 16, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 16, 2009.
- 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.