Use of nonionic cellulose ethers in joint-sealing materials and coating materials
CA 1339385 C · Owner: Knop, Bernhard · Inventors: Loth, Helmut; Podola, Tore; Knop, Bernhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Joint-sealing materials and coating materials which contain aqueous dispersions of polyacrylates or acrylate copolymers, plasticizers and the usual additives such as, pigments and the like, have excellent properties particularly with regard to brushability smoothing, behavior and wash-out resistance when they contain a nonionic cellulose ether selected from the group consisting of hydroxyethyl cellulose, hydroxyethyl-methyl cellulose hydroxypropyl-methyl cellulose and hydroxypropyl cellulose having a Brookfield viscosity in a 2 % aqueous solution at 20°C of at least 3000 mPa.s.
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 August 26, 1997. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 26, 2014.
- 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.