Nutritive glasses for agriculture
US4867779A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1986 |
| Grant date | Sep 19, 1989 |
| Priority date | — |
| Expiry date | Dec 17, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01G24/18
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A vitreous product which can be used in agriculture is disclosed. With the exception of nitrogen, this vetreous product contains all the major and minor mineral elements which are essential for the nutrition of plants. The vitreous products can contain the following constituents, taken in the following proportions by weight: ______________________________________ SiO.sub.2 25 to 65% Fe.sub.2 O.sub.3 1 to 15% P.sub.2 O.sub.5 1 to 15% B.sub.2 O.sub.3 0.01 to 2% K.sub.2 O 5 to 35% MnO 0.01 to 3% CaO 11 to 35% ZnO 0.01 to 3% MgO 1 to 10% CuO 0.01 to 2% SO.sub.3 0.01 to 1% MoO.sub.3 0.01 to 3% Na.sub.2 O 0 to 2% A1.sub.2 O.sub.3 0 to 25% ______________________________________
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.