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. 05, 2002
Filed:
Oct. 20, 1998
Applicant:
Inventors:
Tanemi Asai, Ibo-gun, JP;
Syu Shimamoto, The Hague, JP;
Hiroyuki Matsumura, Himeji, JP;
Tohru Shibata, Himeji, JP;
Assignee:
Daicel Chemical Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B05D 7/00 ; B23B 2/300 ; A24B 1/528 ; B01D 3/900 ;
U.S. Cl.
CPC ...
B05D 7/00 ; B23B 2/300 ; A24B 1/528 ; B01D 3/900 ;
Abstract
A method for producing a tobacco filter material which is either (A) a coating process for coating the surface of a fibrous or particulate cellulose with a cellulose ester having an average substitution degree of about 2.0 to about 2.6 to give a coated cellulose, and wet webbing the coated cellulose into a sheet, or (B) a treating process for treating a naturally-occurring or regenerated cellulose fiber or particle with an organic acid and an organic acid anhydride or organic acid halide in a liquid phase to give a cellulose derivative.