Method for preparing an encapsulated slow-release particulate fertilizer
US5560768A · kind A · utility
10Cited by
29References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 17, 1994 |
| Grant date | Oct 1, 1996 |
| Priority date | — |
| Expiry date | Feb 17, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC05G5/36
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Preparation of an encapsulated slow-release particulate fertilizer. A particulate fertilizer starting material is pretreated for increasing its capacity of holding powderous material by adhesion. The resulting first intermediary product is coated with a powderous waterproofing material which fuses below the phase transition temperature of the fertilizer. A second intermediary product obtained in this way is heated to a temperature below the phase transition temperature to fuse the waterproofing material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.