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:
Mar. 29, 1994
Filed:
Apr. 05, 1991
Applicant:
Inventors:
Tomomi Matsui, Fukui, JP;
Kimiaki Yasuda, Fukui, JP;
Michiyo Nojiri, Fukui, JP;
Masanao Ohno, Fukui, JP;
Assignees:
Sakai Engineering Co., Ltd., Fukui, JP;
Agro-Systems Corporation Limited, Fukui, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08B / ; C08L / ;
U.S. Cl.
CPC ...
536 56 ; 536 57 ; 106122 ; 422 56 ; 521 25 ; 521 61 ;
Abstract
An ultra-lightweight, open-pore foamed cellulose material with an increased surface area, having ion exchangeable functional groups introduced in it. The cellulose material presents a three-dimensional network structure which, upon swollen, has a particle diameter of 0.8 to 12.0 mm, a mean pore diameter of 0.1 to 1.7 mm, a specific surface area of 1.0 to 10.0 m.sup.2 /g, a true density of 1.4 to 1.6 g/cm.sup.3 and a porosity of 90% or greater. The ion exchangeable functional groups, for instance, may be cationic polyethyleneimine.