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:
Aug. 16, 2016
Filed:
Aug. 06, 2014
Applicant:
Chinese Academy of Agricultural Sciences Institute of Agricultural Resources and Regional Planning, Beijing, CN;
Inventors:
Xiangdong Yang, Beijing, CN;
Bingqiang Zhao, Beijing, CN;
Yanting Li, Beijing, CN;
Juan Li, Beijing, CN;
Zhian Lin, Beijing, CN;
Liang Yuan, Beijing, CN;
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
C05G 3/00 (2006.01);
U.S. Cl.
CPC ...
C05G 3/0029 (2013.01);
Abstract
A method for producing controlled-release fertilizer coated with polyurethane is provided, wherein granular fertilizer is preheated under fluidized state in a fluidized bed; the surface of the granular fertilizer is pretreated after liquid paraffin being atomized; polyol and isocyanate are mixed in a nozzle, then atomized and sprayed onto the surface of the granular fertilizer; after the reaction materials are added, liquid paraffin is added for surface release treatment.