Nutritive glasses for agriculture
US5037470A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1989 |
| Grant date | Aug 6, 1991 |
| Priority date | — |
| Expiry date | Mar 28, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC05G5/40
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A vitreous product which can be used in agriculture is disclosed. With the exception of nitrogen, this vitreous 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% Al.sub.2 O.sub.3 0 to 25%. ______________________________________
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.