Urea-formaldehyde granular fertilizer
US4280830A · kind A · utility
14Cited by
7References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 23, 1980 |
| Grant date | Jul 28, 1981 |
| Priority date | — |
| Expiry date | Jan 23, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S71/904
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A free-flowing granular fertilizer composition and a process for its preparation in which the granules comprise expanded, substantially oil-free coffee grounds as a carrier coated and impregnated with a urea-formaldehyde condensation product. The condensation product has from 1 to 3 moles of urea for each mole of formaldehyde and the composition has at least 15% of the total nitrogen in cold water insoluble form.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.