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:
Nov. 06, 1984
Filed:
Mar. 28, 1983
Applicant:
Inventor:
Franklin W Herrick, Shelton, WA (US);
Assignee:
International Telephone and Telegraph Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
D21H / ;
U.S. Cl.
CPC ...
162158 ; 162-9 ; 162100 ; 162175 ; 162177 ; 1621812 ; 1621813 ; 162182 ; 162187 ;
Abstract
A process of preparing microfibrillated cellulose comprising adding to never-dried cellulosic pulp an additive compound capable of substantially inhibiting hydrogen bonding of the fibrils in the cellulose and then drying the pulp and additive. Microfibrillation of a suspension of the cellulosic pulp is carried out at considerably increased efficiency if the additive compound is present prior to drying the pulp. The resulting MFC product can be dried and redispersed without substantial loss of viscosity.