Procedure for lowering the carbamate content of products made of cellulose carbamate, and products made by the procedure
CA 1305471 C · Owner: Selin, Johan-Fredrik · Inventors: Mandell, Leo; Selin, Johan-Fredrik; Meinander, Kerstin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
of Disclosure, The invention concerns a procedure for lowering the carbamate content of products made from cellulose carbamate by treating, said products with basic solutions and products manufactured by, the procedure. The basic solution contains one or several alkali metal salts selected from the group: carbonates sulphates, phos-, phates, borates, and acetates.
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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 July 21, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 21, 2009.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.