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. 06, 1979
Filed:
Jul. 11, 1977
Applicant:
Inventors:
Hans Heumann, Herne, DE;
Heinrich Hahn, Gelsenkirchen-Buer, DE;
Walter Hilt, Herne, DE;
Heinz Liebing, Herne, DE;
Manfred Schweppe, Herne, DE;
Assignee:
Veba-Chemie Aktiengesellschaft, Gelsenkirchen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C05C / ;
U.S. Cl.
CPC ...
71 28 ; 71 50 ; 71 53 ; 71 63 ; 71 6 / ; 71 6 / ; 71 6 / ; 427212 ;
Abstract
An improved process in the preparation of sustained release fertilizer compositions which comprises subjecting a preponderantly water-soluble granular fertilizer composition first to accretive granulation under accretive granulation conditions with a melt, solution or slurry of one or several fertilizers and in a second stage coating these treated grains with a suitable almost impermeable envelopment.