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:
May. 14, 1996
Filed:
Jun. 03, 1994
Chien-Chun Yang, Hsinchu, TW;
Suey-Sheng Kao, Taipei, TW;
Ching-Chou Tzeng, Taipei, TW;
Mei-Hueih Chen, Hsinchu, TW;
Abstract
A particulate controlled-release pesticide composition having a pesticide encapsulated in a polymer matrix of starch-borax-urea and method of preparation and use thereof is provided. The release rates and release duration of the pesticide compositions are controllable by adjusting the urea content in the compositions. The pesticide composition is preparable by admixing starch, pesticide, urea and water together to form a mixture and agitating the same at a temperature sufficient to gelatinize the mixture and to disperse the mixture. Borax is then added to the mixture in an amount effective to convert the mixture into a rubbery mass. The rubbery mass is then comminuted into small particles, in the presence of added starch, and dried.