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US3758540A
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US
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Ferric chelates of n-(2-hydroxybenzyl) substituted aminopoly carboxylic acids
Assignee: Individual
•
Filing: 1970-10-09
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Granted: 1973-09-11
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Expires: 1990-10-09
Abstract
Abstract Soluble iron (III) chelates of N-(2-hydroxybenzyl) substituted aminopolycarboxylic acid ligands useful in plant nutrition as a source of iron.
Inventors
- 👤 A Martell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:52
CPC Classifications
C; C05; C05D; C05D9/00; C05D9/02; C07; C07F; C07F15/00; C07F15/02; C07F15/025; Y; Y10; Y10S; Y10S71/00; Y10S71/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
Fe(III) chelate of N,N''''-bis-2-hydroxybenzyl-N,N'' ,N''''-diethylenetriaminetriacetic acid.
Claim 2
Dependent Claim
9 words
The disodium salt of the chelate of claim 2.
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |