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:
Sep. 09, 2025
Filed:
Oct. 29, 2021
Applicant:
Tokuyama Corporation, Shunan, JP;
Inventor:
Shingo Hiranaka, Shunan, JP;
Assignee:
Tokuyama Corporation, Yamaguchi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C04B 11/26 (2006.01); B09B 3/45 (2022.01); C01F 11/46 (2006.01);
U.S. Cl.
CPC ...
C04B 11/262 (2013.01); B09B 3/45 (2022.01); C01F 11/466 (2013.01); C01F 11/468 (2013.01);
Abstract
Wasted gypsum boards are crushed and calcined to gypsum granular solid, and the gypsum granular solid is mixed with water to form gypsum slurry. Gypsum particles are deposited from the gypsum slurry in a crystallization tank. Heated steam is blown into the gypsum slurry at a height from surface of the gypsum slurry and down to upper ⅕ of the gypsum slurry to heat the gypsum slurry and to eliminate foam on the gypsum slurry.