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. 07, 2009
Filed:
Jun. 23, 2004
Applicants:
Hachiro Hirano, Chiba, JP;
Yasunori Yamaguchi, Chiba, JP;
Minako Okamura, Chiba, JP;
Inventors:
Assignee:
Asahi Glass Company, Limited, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01D 7/12 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for producing a porous potassium carbonate, which comprises calcining potassium hydrogen carbonate crystals having a mean particle diameter of from 100 to 1,000 μm at a temperature of the object to be calcined of from 100 to 500° C., while introducing a dry gas which has a dew point of not higher than 0° C. and a temperature of from 10 to 50° C.