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. 10, 1998
Filed:
Jun. 13, 1996
Applicant:
Inventors:
Fred Abraham, Wheeling, WV (US);
Frank E Gilmore, II, Glen Dale, WV (US);
Assignee:
PPG Industries, Inc., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G14C / ; C01B / ;
U.S. Cl.
CPC ...
8 9416 ; 4235662 ; 252-857 ;
Abstract
Describes an aqueous composition of sodium potassium sulfide and methods for preparing this inter-alkali metal sulfide. One method described is the addition of sodium hydrosulfide to potassium hydroxide in an aqueous reaction medium. The aqueous sodium potassium sulfide composition preferably contains a slight excess of alkali metal hydrosulfide, e.g., sodium hydrosulfide. The sodium potassium sulfide is useful as a depilatory for removing hair from the hides of animals consumed as food.