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. 08, 1980
Filed:
Jul. 26, 1977
Clarence C McCorsley, III, Asheville, NC (US);
Julianna K Varga, Asheville, NC (US);
Akzona Incorporated, Asheville, NC (US);
Abstract
A process is provided for making a solid precursor of a solution of cellulose in a tertiary amine oxide by suspending cellulose in a mixture containing a tertiary amine oxide and water under conditions where the amine oxide will not dissolve the cellulose until sufficient amine oxide has been absorbed to dissolve the cellulose when it is heated. An organic liquid which is not chemically reactive with the amine oxide or cellulose but is miscible with the tertiary amine oxide and is a non-solvent for the cellulose may be included in the amine oxide-water mixture to assist in the removal of excess water from the precursor or promote better distribution of the tertiary amine oxide through the cellulose.