Use of graft polymers based on polyesters, polyester urethanes and polyester amides as grayness inhibitors in detergents
CA 1307435 C · Owner: Kud, Alexander · Inventors: Trieselt, Wolfgang; Kud, Alexander; Hartmann, Heinrich
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
O.Z. 0050/39110, Abstract of the Disclosure: Detergents contain graft polymers obtainable by grafting, a) polycondensates based on polyesters polyester ure-, thanes and polyester amides and having in each case a number average molecular weight from 500 to 100,000 with, b) from 0.2 to 10 parts by weight based on 1 part by, weight of the polycondensates of vinyl esters of, saturated C1- to C6-carboxylic acids acrylic and/, or methacrylic esters of saturated monohydric alcohols containing 1 to 4 carbon atoms.
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 September 15, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 15, 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.