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. 23, 2004
Filed:
Sep. 16, 2002
Applicant:
Inventors:
Michiel Nakamura, Tokyo, JP;
Yoshiyuki Zama, Tokyo, JP;
Hisao Okamoto, Tokyo, JP;
Atsushi Nogami, Tokyo, JP;
Naoyuki Sakai, Tokyo, JP;
Hideyuki Koiso, Tokyo, JP;
Assignee:
Dainichiseika Color & Chemicals Mfg. Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C03C 1/700 ; C08C 1/920 ; C09D 5/00 ;
U.S. Cl.
CPC ...
C03C 1/700 ; C08C 1/920 ; C09D 5/00 ;
Abstract
A process produces a sulfonated solid particle by burning sulfur to yield gaseous sulfur dioxide, subjecting the gaseous sulfur dioxide to catalytic oxidation to yield gaseous sulfur trioxide, and sulfonating a dry powdery or granular solid particle with the gaseous sulfur trioxide in a gas phase-solid phase reaction.