US3930833A
Expired / Lapsed
US
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Micronutrient metal-containing phosphate glasses
Assignee: Vibrantz Corp
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Filing: 1973-10-18
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Granted: 1976-01-06
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Expires: 1993-10-18
Abstract
Abstract Glass compositions are disclosed that are particularly useful in comminuted form as sources of micronutrient elements for soils. The glasses are based on phosphorus as P 2 O 5 and contain a nutrient amount of a micronutrient metal in oxide form, such as zinc, copper, manganese, molybdenum, or boron oxides or mixtures thereof, plus a solubility control agent. The control agent is a metal compound or mixture of metal compounds, usually potassium or sodium oxide or potassium or sodium chloride, and is present in the glass to provide a controlled release of the micronutrient metal, both as to amount and rate.
Inventors
- 👤 Gordon J. Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:45
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/12; C03C3/16; C03C3/19; C03C3/04; C03C3/062; C05; C05B; C05B13/00; C05B13/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
125 words
A glass composition adapted in comminuted form to act as a micronutrient in both acidic and alkaline soils consisting essentially of a non-oxidizing phosphate base glass containing a nutrient amount of zinc oxide to nourish plant and seed growth in such acidic or alkaline soils, and a metal control agent to control the water-solubility of said glass composition and provide a water-extraction of said zinc oxide from said phosphate base glass at a rate within a predetermined range, said glass composition consisting essentially in weight percent of about: Percent
______________________________________
P.sub.2 O.sub.5 25 to 65
Zinc Oxide 30 to 60
Control Agent 5 to 20
______________________________________ said control agent being R 2 O or RCl or mixtures thereof, in which R is sodium or potassium.
Claim 2
Dependent Claim
125 words
A glass composition adapted in comminuted form to act as a micronutrient in both acidic and alkaline soils consisting essentially of a non-oxidizing phosphate base glass containing a nutrient amount of zinc oxide to nourish plant and seed growth in such acidic or alkaline soils, and a metal control agent to control the water-solubility of said glass composition and provide a water-extraction of said zinc oxide from said phosphate base glass at a rate within a predetermined range, said glass composition consisting essentially in weight percent of about: Percent
______________________________________
P.sub.2 O.sub.5 25 to 65
Zinc Oxide 30 to 60
Control Agent 5 to 20
______________________________________ said control agent being R 2 O or RCl or mixtures thereof, in which R is sodium or potassium.
Claim 3
Dependent Claim
26 words
The glass composition of claim 1 in which said amount of control agent includes B 2 O 3 up to 5% by weight of said amount.
Claim 4
Dependent Claim
23 words
The glass composition of claim 1 in which said amount of control agent includes CaO up to 15% by weight of said amount.
Claim 5
Dependent Claim
24 words
The glass composition of claim 1 in which said amount of control agent includes SiO 2 up to 15% by weight of said amount.
Claim 6
Dependent Claim
116 words
A process for preparing a micronutrient glass adapted to be added to soil to enrich the life of plants and seeds plated therein, comprising: preparing a non-oxidizing phosphate base glass containing from about 30% to about 60% by weight of zinc oxide to nourish plant and seed growth in such soil, and controlling the water-solubility of the glass by including in the glass from about 5% to about 20% by weight of a metal control agent to provide a water-extraction of said zinc oxide from said phosphate base glass at a rate within a predetermined range, said metal control agent being R 2 O or RCl or mixtures thereof, in which R is potassium or sodium.
Claim 7
Dependent Claim
116 words
A process for preparing a micronutrient glass adapted to be added to soil to enrich the life of plants and seeds plated therein, comprising: preparing a non-oxidizing phosphate base glass containing from about 30% to about 60% by weight of zinc oxide to nourish plant and seed growth in such soil, and controlling the water-solubility of the glass by including in the glass from about 5% to about 20% by weight of a metal control agent to provide a water-extraction of said zinc oxide from said phosphate base glass at a rate within a predetermined range, said metal control agent being R 2 O or RCl or mixtures thereof, in which R is potassium or sodium.
Claim 8
Dependent Claim
111 words
A process for enriching the life of plants and seeds thereof planted in soil comprising adding to said soil a comminuted glass comprising a non-oxidizing phosphate base glass containing from about 30% to about 60% by weight of zinc oxide to nourish said plant and seed growth in such soil, and from about 5% to about 20% by weight of a metal control agent to control the water-solubility of said glass and provide a water-extraction of said zinc oxide from said phosphate base glass at a rate within a predetermined range, said metal control agent being R 2 O or RCl or mixtures thereof, in which R is potassium or sodium.
Claim 9
Dependent Claim
111 words
A process for enriching the life of plants and seeds thereof planted in soil comprising adding to said soil a comminuted glass comprising a non-oxidizing phosphate base glass containing from about 30% to about 60% by weight of zinc oxide to nourish said plant and seed growth in such soil, and from about 5% to about 20% by weight of a metal control agent to control the water-solubility of said glass and provide a water-extraction of said zinc oxide from said phosphate base glass at a rate within a predetermined range, said metal control agent being R 2 O or RCl or mixtures thereof, in which R is potassium or sodium.
Claim 10
Dependent Claim
13 words
The process of claim 6 in which said soil has an acidic pH.
Claim 11
Dependent Claim
13 words
The process of claim 6 in which said soil has an alkaline pH.
Claim 12
Dependent Claim
62 words
The process of claim 6 in which said soil is alkaline, and said glass composition is adapted to form an aqueous acid extract containing the zinc oxide, and including leaching said glass with water to provide a less alkaline microenvironment adjacent said plants and seeds in said alkaline soil and thereby facilitate assimulation by the plants and seeds of said micronutrient metal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |