Patent EP0349430A2 successfully refreshed from Google Patents.
US3742002A
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Iron chelates useful for supplying iron to plants growing in calcareous soil
Assignee: WR Grace and Co Conn
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Filing: 1971-06-14
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Granted: 1973-06-26
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Expires: 1991-06-14
Abstract
Abstract Iron chelates useful for supplying iron to plants growing in calcareous iron deficient soil are prepared by admixing an iron(II) or iron(III) compound with a compound formed by reacting a slat of an Alpha -amino acid having the formula H2NC(Z)HCOOH wherein Z is hydrogen, a lower alkyl group, a phenyl group, an aralkyl group having 7-10 carbon atoms, an alkaryl group having 7-10 carbon atoms, or a cycloalkyl group having 3-8 carbon atoms with formaldehyde and a phenol having the formula X-C6H4-OH where X is -SO3M, -COOM, or an alkyl group having about 1-4 carbon atoms, and M is a member selected from a second group consisting of an alkali metal cation, HN *(CH2CH2OH)3, and A, wherein A is one half of an alkaline earth metal cation.
Inventors
- 👤 J Ohlson
- 👤 P Scanlon
- 👤 R Gaudette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:33
CPC Classifications
C; C07; C07F; C07F15/00; C07F15/02; C07F15/025; Y; Y10; Y10T; Y10T29/00; Y10T29/45
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
11 words
The iron chelate of claim 1 in which M is sodium.
Claim 2
Dependent Claim
11 words
The iron chelate of claim 1 in which X is -SO3Na.
Claim 3
Dependent Claim
11 words
The iron chelate of claim 1 in which X is -COONa.
Claim 4
Dependent Claim
11 words
The iron chelate of claim 1 in which X is -CH3.
Claim 5
Dependent Claim
18 words
The iron chelate of claim 1 in which the iron is iron (III) and Z is hydrogen, -CH3,
Claim 6
Dependent Claim
18 words
The iron chelate of Claim 1 in which the iron is iron (II) and Z is hydrogen, -CH3,
Claim 7
Dependent Claim
5 words
A compound having the formula
Claim 8
Dependent Claim
10 words
The compound of claim 8 in which M is sodium.
Claim 9
Dependent Claim
10 words
The compound of claim 8 in which X is -SO3Na.
Claim 10
Dependent Claim
10 words
The compound of claim 8 in which X is -COONa.
Claim 11
Dependent Claim
11 words
The compound of claim 8 in Which Z is hydrogen, -CH3,
Claim 12
Dependent Claim
80 words
A process for preparing the compound of claim 8, comprising: a. admixing in an aqueous medium; (i) a first reactant having the formula H2N-C(Z)HCOOM in which Z is hydrogen, a lower alkyl radical, a phenyl radical, a hydrocarbyl aralkyl radical having 7-10 carbon atoms, or a hydrocarbyl alkaryl radical having 7-10 carbon atoms and M is an alkali metal cation, HN*(CH2CH2OH)3, or A, wherein A is one-half of an alkaline earth metal cation; (ii) a second reactant having the formula
Claim 13
Dependent Claim
97 words
The process of claim 13 in which; a. the first reactant, the formaldehyde, and a portion of the aqueous medium are admixed, the weight ratio of first reactant to aqueous medium being 1:2-10 to form a first solution; b. the second reactant and the remaining portion of the aqueous medium are admixed to form a second solution; c. the first solution and the second solution are admixed while maintaining the resulting mixture at 70*-80* C., and subsequent to completion of the admixing, maintaining the resulting mixture at 70*-80* C. for 2-14 hours to form the product compound.
Claim 14
Dependent Claim
10 words
The process of claim 13 in which M is sodium.
Claim 15
Dependent Claim
10 words
The process of claim 13 in which X is -SO3Na.
Claim 16
Dependent Claim
10 words
The process of claim 13 in which X is -COONa.
Claim 17
Dependent Claim
11 words
The process of claim 13 in which Z is hydrogen, -CH3,
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) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |