US4652435A
Expired / Lapsed
US
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Stabilized ferrous compound composition
Assignee: Zeon Corp
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Filing: 1985-12-10
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Granted: 1987-03-24
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Expires: 2005-12-10
Abstract
Abstract A composition comprising a ferrous compound and as a stabilizer, at least one compound selected from the group consisting of (A) erythorbic acid compounds, (B) hydroxycarboxylic acid compounds and (c) oxocarboxylic acid compounds.
Inventors
- 👤 Tadao Natsuume
- 👤 Tsunehisa Ueda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:52
CPC Classifications
C; C01; C01G; C01G49/00; C01G49/14; C01G49/10
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
63 words
A composition consisting essentially of a ferrous compound selected from the group consisting of ferrous sulfate, ferrous chloride and ferrous nitrate and as a stabilizer, at least one compound selected from the group consisting of (A) erythorbic acid compounds, (B) hydroxycarboxylic acid compounds having 2 to 8 carbon atoms and (C) oxocarboxylic acid compounds having 2 to 8 carbon atoms and, optionally, water.
Claim 2
Dependent Claim
63 words
A composition consisting essentially of a ferrous compound selected from the group consisting of ferrous sulfate, ferrous chloride and ferrous nitrate and as a stabilizer, at least one compound selected from the group consisting of (A) erythorbic acid compounds, (B) hydroxycarboxylic acid compounds having 2 to 8 carbon atoms and (C) oxocarboxylic acid compounds having 2 to 8 carbon atoms and, optionally, water.
Claim 3
Dependent Claim
14 words
The composition of claim 1 which is in the form of an aqueous solution.
Claim 4
Dependent Claim
13 words
The composition of claim 1 which is in the form of a powder.
Claim 5
Dependent Claim
15 words
The composition of claim 3 which is obtained by drying the composition of claim 2.
Claim 6
Dependent Claim
18 words
The composition of claim 3 obtained by mixing a powder of the ferrous compound with the stabilizer compound.
Claim 7
Dependent Claim
27 words
The composition of claim 1 wherein the amount of the stabilizer compound is 0.5 to 20% by weight based on the iron content of the ferrous compound.
Claim 8
Dependent Claim
13 words
The composition of claim 1 wherein the hydroxycarboxyclic acid compounds are aliphatic compounds.
Claim 9
Dependent Claim
13 words
The composition of claim 1 wherein the oxocarboxylic acid compounds are aliphatic compounds.
Claim 10
Dependent Claim
24 words
The composition of claim 1 wherein the stabilizer compound is a mixture of the compound (A) with the compound (B) and/or the compound (C).
Claim 11
Dependent Claim
32 words
The composition of claim 1 wherein the stabilizer compound is a mixture of the compound (A) with the compound (B) or the compound (C) in a mole ratio of 20:80 to 80:20.
Claim 12
Dependent Claim
68 words
The composition of claim 1 wherein the stabilizer is the hydroxycarboxylic acid compound (B) and is selected from the group consisting of lactic acid, hydroxyacetic acid, hydroxybutyric acid, malic acid, tartaric acid, glyceric acid, citric acid, alpha-methylmalic acid, beta-hydroxglutaric acid, desoxalic acid, monoethyl tartrate, monoethyl citrate, gluconic acid, galactaric acid, glucronic acid, ketogluconic acid, salicylic acid, p-hydroxybenzoic acid, 2,4-dihydroxybenzoic acid, gallic acid, hydroxyphthalic acid and the salts thereof.
Claim 13
Dependent Claim
32 words
The composition of claim 1 wherein the stabilizer is the oxocarboxylic acid compound (C) and contains at least one aldehyde or keto group and at least one carboxyl group in the molecule.
Claim 14
Dependent Claim
30 words
The composition of claim 1 wherein the stabilizer is the hydroxycarboxylic acid compound (B) and contains at least one hydroxyl group and at least one carboxyl group in the molecule.
Claim 15
Dependent Claim
50 words
The composition of claim 1 wherein the stabilizer is the oxocarboxylic acid compound (C) and is selected from the group consisting of glyoxylic acid, malonaldehydic acid, succinaldehydic acid, pyruvic acid, 2-ketobutyric acid, 4-acetylbutyric acid, 2-ketoglutaric acid, 4-keto-n-valeric acid, acetoacetic acid, oxomalonic acid, oxaloacetic acid, acetonedicarboxylic acid and the salts thereof.
Claim 16
Dependent Claim
31 words
The composition of claim 1 wherein the stabilizer is the erythorbic acid compound (A) and is selected from the group consisting of erythorbic acid and the sodium and potassium salts thereof.
References Cited (Backward Citations)
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US2324348A
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US2411636A
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US2822317A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-23 | 1990-09-22 | 1991-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-23 | 1994-09-22 | 1995-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-23 | 1998-09-22 | 1999-03-24 | $7700.00 | Window Closed / Lapsed |