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:
Feb. 14, 2017
Filed:
Aug. 21, 2012
James M. Lockhart, Vancouver, CA;
James M. Lockhart, Vancouver, CA;
NORAM Engineering and Constructors Ltd., Vancouver, BC, CA;
Abstract
A method of recovering purified partly-hydrolyzed cellulose () from a composition () comprising partly-hydrolyzed cellulose and an acid, such as sulfuric acid. A base () having a cation that forms a precipitate with the anion of the acid is added to the composition. For example, a base such as barium hydroxide is added to form a sulfate precipitate. The precipitate () is then separated from the partly-hydrolyzed cellulose (), thus reducing its acid content. The method may include additional steps of centrifugation () of the composition, breaking-up agglomerations () in the composition after precipitation, and dialysis ().