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:
Jul. 12, 1988
Filed:
Nov. 21, 1986
Applicant:
Inventor:
William J Detroit, Schofield, WI (US);
Assignee:
Reed Lignin, Inc., Rothschild, WI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C05C / ; C05C / ; C05G / ;
U.S. Cl.
CPC ...
71 27 ; 71 28 ; 71 6406 ; 71 6411 ;
Abstract
A hydrolyzed lignosulfonate-acrylonitrile graft copolymer matrix providing a slow release solubility to fertilizers. The hydrolysis of the graft copolymer of lignosulfonate and acrylonitrile may be carried out in the presence of an alkali in situ during the fertilizer manufacturing process or in a prehydrolysis step with subsequent use of the hydrolyzed copolymer in the fertilizer manufacturing process to provide a controlled release formulation for various fertilizers.