Heat stable prepastes for wallcoverings
CA 1307870 C · Owner: Scott Bader Company Limited · Inventors: Chaudhry, Arshad-Ul-Haq
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
HEAT STABLE PREPASTES FOR WALLCOVERINGS" ABSTRACT, A method of producing a prepasted wallcovering comprises applying to a substrate a paste composition comprising a water-in-oil emulsion of a water-soluble polymer which is essentially wholly anionic but contains a small amount of crosslinking residues derived from a polyfunctional monomer. The composition additionally contains a surfactant and has a pH of at least 7. The method is especially applicable to the production of prepasted wallcoverings which require a subsequent heat treatment step, the composition being designed to withstand temperatures of at least 200°C.
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 22, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 22, 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.