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. 13, 1990
Filed:
Jun. 23, 1988
Applicant:
Inventors:
Kannosuke Maeda, Ashiya, JP;
Toshio Aoyama, Kyoto, JP;
Assignee:
Sankyo Kasei Co., Ltd., Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
C01D / ; C01B / ;
U.S. Cl.
CPC ...
2330 / ; 4235 / ; 23300 ;
Abstract
Disclosed are single crystals of anhydrous sodium sulfide, and a method of producing single crystals of anhydrous sodium sulfide, characterized in that the method comprises concentrating an aqueous solution of sodium sulfide at a temperature of 97.degree. C. or higher, the solution containing about 2 to about 15% by weight of NaOH based on the aqueous solution to precipitate single crystals of anhydrous sodium sulfide from the aqueous solution.