Washing agents containing, as additives, carboxyl- containing copolymers which are neutralized or amidated with amines
CA 1265019 C · Owner: Hettche, Albert · Inventors: Hettche, Albert; Trieselt, Wolfgang; Denzinger, Walter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Washing agents contain as, additives for inhibiting redeposition and promoting the primary washing action, homopolymers of acrylic acid and of methacrylic acid, copolymers of acrylic acid and methacrylic acid and copolymers which contain as essential, components, (a) an ethylenically unsaturated dicarboxylic acid of 4 to 6 carbon atoms and, (b) acrylic acid methacrylic acid and/or hydroxy-C2-C6alkyl esters of ethylenically unsaturated C3-C6-carboxylic acids as copolymerized units, where the homo- and copolymers in the form of the free acids have a weight average molecular weight of from 5000 to 500,000 in the neutralized or amidated form the carboxyl, groups of the homo- and copolymers in …
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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 January 30, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 30, 2007.
- 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.