US4046793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chelates for the regulation of metal-deficiency phenomena in plants
Assignee: Novartis Corp
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Filing: 1974-10-03
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Granted: 1977-09-06
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Expires: 1994-10-03
Abstract
Abstract N-carboxymethyl-N-(hydroxybenzyl)-asparagic acids which may be further substituted in the phenyl nucleus possess metal-chelating properties for metals such as iron magnesium, calcium, manganese, cobalt, nickel, copper, zinc, cadmium or related metals. Chelates of this type may be used for the regulation of metal-deficiency phenomena in plants.
Inventors
- 👤 Peter Baccini
- 👤 Werner Fory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:38
CPC Classifications
C; C05; C05D; C05D9/00; C05D9/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
95 words
A metal chelate selected from the group consisting of iron, magnesium, calcium, manganese, cobalt, nickel, copper, zinc and cadmium metals of an asparagic acid derivative of formula I ##STR6## wherein R 1 represents hydrogen, hydroxy, halogen, sulpho, carboxyl C 1 -C 6 alkyl, C 1 -C 6 alkoxy, C 1 -C 6 halogenoalkyl, di- (C 1 -C 6 alkyl) amino, C 2 -C 4 alkanoyl or phenyl, R 2 represents hydrogen, hydroxy, halogen, C 1 -C 6 alkyl or C 1 -C 6 alkoxy, and R 3 represents hydrogen or C 1 -C 6 alkyl.
Claim 2
Dependent Claim
95 words
A metal chelate selected from the group consisting of iron, magnesium, calcium, manganese, cobalt, nickel, copper, zinc and cadmium metals of an asparagic acid derivative of formula I ##STR6## wherein R 1 represents hydrogen, hydroxy, halogen, sulpho, carboxyl C 1 -C 6 alkyl, C 1 -C 6 alkoxy, C 1 -C 6 halogenoalkyl, di- (C 1 -C 6 alkyl) amino, C 2 -C 4 alkanoyl or phenyl, R 2 represents hydrogen, hydroxy, halogen, C 1 -C 6 alkyl or C 1 -C 6 alkoxy, and R 3 represents hydrogen or C 1 -C 6 alkyl.
Claim 3
Dependent Claim
54 words
The metal chelates of the asparagic acid derivatives of formula Ia according to claim 1 ##STR7## wherein R 4 represents hydrogen, hydroxy, halogen, sulpho, carboxyl, C 1 -C 6 alkyl, C 1 -C 4 alkoxy, or phenyl, and R 5 represents hydrogen, halogen, C 1 -C 6 alkyl or C 1 -C 4 alkoxy.
Claim 4
Dependent Claim
14 words
The metal chelate of the compound of the formula ##STR8## according to claim 1.
Claim 5
Dependent Claim
14 words
The metal chelate of the compound of the formula ##STR9## according to claim 1.
Claim 6
Dependent Claim
14 words
The metal chelate of the compound of the formula ##STR10## according to claim 1.
Claim 7
Dependent Claim
11 words
The chelate of claim 1, wherein said metal is iron (III).
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) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |