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:
Jan. 08, 2013
Filed:
Mar. 03, 2010
Applicants:
Owen P. Ward, Waterloo, CA;
Ajay Singh, Milton, CA;
Inventors:
Owen P. Ward, Waterloo, CA;
Ajay Singh, Milton, CA;
Assignee:
Lystek International Inc., Waterloo, Ontario, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F 3/00 (2006.01); C05F 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Sewage sludge is dewatered to a cake-like state. The viscosity of the sludge is lowered by admixing a quantity of urea, urea-ammonium-nitrate, or other nitrogen-containing material, in with the dewatered sludge. The treatment also removes pathogens, and renders the product suitable for use as a fertilizer.