Patent US3663197A successfully refreshed from Google Patents.
US3663197A
Expired / Lapsed
US
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Increased component concentration of iron nutrient solution
Assignee: Union Oil Company of California
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Filing: 1969-11-12
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Granted: 1972-05-16
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Expires: 1989-11-12
Abstract
Abstract A solution suitable for application to plants and soil to correct iron deficiencies is described which comprises an aqueous solution of ferrous sulfate and mono-potassium or mono-ammonium hydrogen orthophosphate having an acidic pH value from about 1.5 to about 4, and wherein the components of the solution manifest a mutually increased solubility.
Inventors
- 👤 Peter Stanley Backlund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:00
CPC Classifications
C; C05; C05B; C05B7/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
16 words
The solution defined in claim 1 wherein said mineral acid is nitric, sulfuric, or phosphorus acid.
Claim 2
Dependent Claim
15 words
The aqueous fertilizer solution of claim 1 wherein said phosphorus solute is mono-ammonium hydrogen orthophosphate.
Claim 3
Dependent Claim
15 words
The aqueous fertilizer solution of claim 1 wherein said phosphorus solute is mono-potassium hydrogen orthophosphate.
Claim 4
Dependent Claim
47 words
The aqueous fertilizer solution of claim 1 wherein said phosphorus solute is mono-potassium hydrogen orthophosphate and said combined solutes are present at a concentration greater than the saturated concentration of said solutes at 0* C. and less than the saturated concentration of said solutes at 20* C.
Claim 5
Dependent Claim
47 words
The aqueous fertilizer solution of claim 1 wherein said phosphorus solute is mono-ammonium hydrogen orthophosphate and said combined solutes are present at a concentration greater than the saturated concentration of said solutes at 0* C. and less than the saturated concentration of said solutes at 20* C.
References Cited (Backward Citations)
US2270518A
Cited
US2950183A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |