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:
Apr. 04, 1978
Filed:
Jan. 28, 1975
Applicant:
Inventors:
William Montgomery Hearon, Portland, OR (US);
John F Witte, Vancouver, WA (US);
Cheng Fan Lo, Vancouver, WA (US);
Assignee:
Boise Cascade Corporation, Portland, OR (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08B / ;
U.S. Cl.
CPC ...
536 30 ;
Abstract
Dialdehyde cellulose is produced by reacting cellulose in aqueous medium with meta periodate ion used in a molar ratio of from 1.2 to 12 moles of meta periodate ion per mole of cellulose at a temperature of from 36.degree. to 60.degree. C. and a pH of between 2 and the conversion pH of water soluble meta periodate to water insoluble para periodate, and separating the dialdehyde cellulose product from the reaction mixture.