Process for producing pulp-forming particles and synthetic paper-like sheets made therefrom
CA 1067244 A · Owner: Teijin Limited · Inventors: Mizutani, Hirotoshi; Tanaka, Katsuji; Tabe, Yutaka
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for preparing pulp-forming particles comprises adding a solution in an aqueous organic solvent of a thermally stable aromatic nitrogen-containing polymer selected from aromatic polyamides and nitrogencontaining polyheterocyclic compounds to a precipitant to form a dispersion containing pulp-forming particles of the polymer. The precipitant consists of water and an amide-type solvent for the polymer present in selected ranges depending on the polymer used. The pulp-forming particles are heated to 30 to 90°C in the presence of at least 2 parts by weight ofa mixture of aqueous organic solvent and precipitant, per part by weight of the pulp-forming particles. The resulting …
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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 November 27, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 27, 1996.
- 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.