The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 23, 2013
Filed:
May. 06, 2009
Marianna Vehvilainen, Tampere, FI;
Pertti Nousiainen, Tampere, FI;
Taina Kamppuri, Tampere, FI;
Maija Jarventausta, Lempaala, FI;
Marianna Vehvilainen, Tampere, FI;
Pertti Nousiainen, Tampere, FI;
Taina Kamppuri, Tampere, FI;
Maija Jarventausta, Lempaala, FI;
TTY Saatio, Tampere, FR;
Abstract
The present invention relates to a method for dissolving cellulose. The method comprises—introducing cellulosic raw material,—treating the cellulosic raw material in an enzymatic treatment process,—mixing the cellulosic raw material after the enzymatic treatment in an aqueous solution in order to obtain an aqueous intermediate product containing the cellulosic raw material of at least 3.5 wt.-%, alkali metal hydroxide between 3.5 wt.-% and 7 wt.-% and zinc salt,—freezing the intermediate product to a solid state, and—melting the frozen intermediate product. The present invention also relates to a cellulosic product obtained from a solution comprising dissolved cellulose.