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:
Dec. 07, 1976
Filed:
Dec. 09, 1975
Applicant:
Inventors:
Charles A Gray, Princeton, NJ (US);
Sidney Berkowitz, Highland Park, NJ (US);
James Lawrence Manganaro, E. Windsor, NJ (US);
Assignee:
FMC Corporation, Philadelphia, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
2602 / ;
Abstract
Waste digester liquor, containing dissolved triazines and iron, is treated with ammonia until the pH is about 2.5 to 4 thereby precipitating most of the triazines while leaving most of the iron in solution. The triazines are separated and recycled back to the digester. The filtrate of ammonium salts is useful as a source of fertilizer nitrogen.