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. 14, 1989
Filed:
Feb. 26, 1988
Itzhak Blank, Haifa, IL;
Haifa Chemicals Limited, Haifa, IL;
Abstract
A method for the manufacture of physically prepared slow-release fertilizer by coating fertilizer particles with at least one layer of a substantially water insoluble polymer possessing a three dimensional structure. The three dimensional structure results from a prepolymerized crosslinked unsaturated oil having between 12 to 20 carbon atoms and a iodine value of at least 120, the extent of crosslinking being above 5%. Optionally, the coating layer contains micronutrients and inert materials. In a preferred embodiment, the coating consists of three layers, the first being obtained with a high viscous unsaturated oil and the subsequent two layers with a lower viscosity unsaturated oil. The method is applicable for most of the known water-soluble fertilizers.