US3981712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of iron deficiencies in plants with iron complexes of ethylene-bis-(α-imino-2-hydroxyaryl acetic acids)
Assignee: Novartis Corp
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Filing: 1975-07-03
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Granted: 1976-09-21
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Expires: 1995-07-03
Abstract
Abstract Compositions and methods useful for the treatment of iron deficiencies in plant utilizing new iron complexes of ethylene-bis(α-imino-2-hydroxyaryl-acetic acids) containing sulfonic acid groups are disclosed in which the molar ratio of iron to ligand is from about 1.1:1 to 3:1. These complexes are stable at pH values of from about 6.0 to 9.0.
Inventors
- 👤 Harris E. Petree
- 👤 Joseph W. Stutts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:57
CPC Classifications
C; C07; C07F; C07F15/00; C07F15/02; C07F15/025; C05; C05D; C05D9/00; C05D9/02; Y; Y10; Y10S; Y10S71/00; Y10S71/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
69 words
A composition of matter for the treatment of iron deficiencies in plants which comprises from about one-hundredth to about 50 percent by weight of at least one iron complex of ethylene-bis-(α-imino-2-hydroxyaryl acetic acid) as active ingredient of the formula ##EQU2## wherein Ar is selected from the group consisting of ##SPC5## wherein X is 1 to 3 the molar ratio of ligand to iron being from about 1:1.1 to 1:3.0.
Claim 2
Dependent Claim
69 words
A composition of matter for the treatment of iron deficiencies in plants which comprises from about one-hundredth to about 50 percent by weight of at least one iron complex of ethylene-bis-(α-imino-2-hydroxyaryl acetic acid) as active ingredient of the formula ##EQU2## wherein Ar is selected from the group consisting of ##SPC5## wherein X is 1 to 3 the molar ratio of ligand to iron being from about 1:1.1 to 1:3.0.
Claim 3
Dependent Claim
57 words
A composition as claimed in claim 1, wherein the ethylene-bis-(α-imino-2-hydroxyaryl acetic acid) has the formula ##SPC6## wherein X 1 and X 2 are each linked in the 3-, 4- or 5-position to the respective benzene nuclei and each represents --SO 3 H and wherein the molar ratio of ligand to iron is from about 1:1.0 to 1:2.0.
Claim 4
Dependent Claim
16 words
A composition as claimed in claim 2, wherein the ethylene-bis-(α-imino-2-hydroxyaryl acetic acid) is ethylene-bis-(α-imino-2-hydroxy-5-sulfophenyl acetic acid).
Claim 5
Dependent Claim
16 words
A composition as claimed in claim 2, wherein the ethylene-bis-(α-imino-2-hydroxyaryl acetic acid) is 1,1'-ethylene-bis-(α-imino-2-hydroxy-3,6-disulfo-2-naphthalene acetic acid).
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) | 1979-09-21 | 1980-03-22 | 1980-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-21 | 1984-03-22 | 1984-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-21 | 1988-03-22 | 1988-09-21 | $7700.00 | Window Closed / Lapsed |