Aqueous filler suspension
CA 1136788 A · Owner: Dynamit Nobel Aktiengesellschaft · Inventors: Hanisch, Horst; Buning, Robert; Hass, Hans-Jurgen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is concerned with aqueous filler suspensions of inorgano-oxidic material and a dispersant which contain as dispersant an aqueous solution of maleic acid/vinyl alkoxy silane copolymers. The aqueous filler suspensions according to the invention have distinctly lower viscosities than conventional systems and are stable. They are primarily used for coating paper, they serve for example to increase the whiteness and covering power or opacity of paper.
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 November 30, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 30, 1999.
- 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.