US3993575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hard surface acid cleaner and brightener
Assignee: FINE ORGANICS Corp F/K/A FOA CORPORATION
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Filing: 1975-05-27
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Granted: 1976-11-23
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Expires: 1995-05-27
Abstract
Abstract An acid cleaner and brightener concentrate composition comprising a dicarboxylic acid, an amine and water having a pH of about 1 to about 3 is useful in removal of tenacious soil, such as tarnish, discoloration, corrosion and oxidation products from vehicles, such as railroad rolling stock, without subsequent harm to surfaces, including coated polycarbonate glass substitute.
Inventors
- 👤 Joseph Howanitz
- 👤 Irwin Greenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:22
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/20; C11D3/2075; C11D3/2082; C11D3/26; C11D3/30
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
106 words
A cleaner concentrate, comprising an aqueous solution of from about 5 to about 30 per cent of a dicarboxylic acid of the formula HOOC--R--COOH, where R is a direct bond or straight or branched chain alkylene of 1 to 4 carbon atoms and from about 3 to about 15% of an amine of the formula: ##EQU1## where R.sub. 1 and R.sub. 2 are independently selected from hydrogen, lower alkyl, or hydroxy lower alkyl, and R.sub. 3 is lower alkyl, lower cycloalkyl or hydroxy lower alkyl, the amount of the amine being sufficient to provide the solution with a pH of from about 1 to about 2.5.
Claim 2
Dependent Claim
106 words
A cleaner concentrate, comprising an aqueous solution of from about 5 to about 30 per cent of a dicarboxylic acid of the formula HOOC--R--COOH, where R is a direct bond or straight or branched chain alkylene of 1 to 4 carbon atoms and from about 3 to about 15% of an amine of the formula: ##EQU1## where R.sub. 1 and R.sub. 2 are independently selected from hydrogen, lower alkyl, or hydroxy lower alkyl, and R.sub. 3 is lower alkyl, lower cycloalkyl or hydroxy lower alkyl, the amount of the amine being sufficient to provide the solution with a pH of from about 1 to about 2.5.
Claim 3
Dependent Claim
22 words
The concentrate according to claim 1, wherein at least one of R.sub. 1, R.sub. 2 and R.sub. 3 is hydroxy lower alkyl.
Claim 4
Dependent Claim
11 words
The concentrate according to claim 2, wherein the amine is monoethanolamine.
Claim 5
Dependent Claim
24 words
The concentrate according to claim 1, wherein the dicarboxylic acid is selected from the group consisting of oxalic, malonic, succinic, glutaric and adipic acid.
Claim 6
Dependent Claim
13 words
The concentrate according to claim 4, wherein the dicarboxylic acid is oxalic acid.
Claim 7
Dependent Claim
24 words
The concentrate according to claim 1, including from about 2 to about 6.5 per cent of a hydroxycarboxylic acid, based on the total composition.
Claim 8
Dependent Claim
25 words
The concentrate according to claim 6, wherein the hydroxycarboxylic acid is selected from the group consisting of glycollic, lactic, malic, tartaric, citric and gluconic acid.
Claim 9
Dependent Claim
13 words
The concentrate according to claim 6, wherein the hydroxycarboxylic acid is gluconic acid.
Claim 10
Dependent Claim
21 words
The concentrate according to claim 1, including from about 1 to about 4 per cent of an acid stable wetting agent.
Claim 11
Dependent Claim
16 words
The concentrate according to claim 9, wherein the acid stable wetting agent is a nonionic surfactant.
Claim 12
Dependent Claim
176 words
A cleaner concentrate consisting essentially of from about 5 to about 30 per cent of a dicarboxylic acid of the formula HOOC--R--COOH, where R is a direct bond or straight or branched chain alkylene of 1 to 4 carbon atoms, from about 3 to about 15 per cent of an amine of the formula: ##EQU2## where R.sub. 1 and R.sub. 2 are independently selected from hydrogen, lower alkyl, or hydroxy lower alkyl, and R.sub. 3 is lower alkyl, lower cycloalkyl or hydroxy lower alkyl; at least one member selected from the group consisting of from about 2 to about 6.5 per cent of a hydroxycarboxylic acid having from 1 to 6 hydroxy groups and 1 to 3 carboxylic acid groups and from about 1 to about 4 per cent of an acid stable wetting agent; and from about 44.5 to about 90 per cent water; the concentrate being in the form of an aqueous solution; the amount of the amine being sufficient to provide the solution with a pH of from about 1 to about 2.5.
Claim 13
Dependent Claim
176 words
A cleaner concentrate consisting essentially of from about 5 to about 30 per cent of a dicarboxylic acid of the formula HOOC--R--COOH, where R is a direct bond or straight or branched chain alkylene of 1 to 4 carbon atoms, from about 3 to about 15 per cent of an amine of the formula: ##EQU2## where R.sub. 1 and R.sub. 2 are independently selected from hydrogen, lower alkyl, or hydroxy lower alkyl, and R.sub. 3 is lower alkyl, lower cycloalkyl or hydroxy lower alkyl; at least one member selected from the group consisting of from about 2 to about 6.5 per cent of a hydroxycarboxylic acid having from 1 to 6 hydroxy groups and 1 to 3 carboxylic acid groups and from about 1 to about 4 per cent of an acid stable wetting agent; and from about 44.5 to about 90 per cent water; the concentrate being in the form of an aqueous solution; the amount of the amine being sufficient to provide the solution with a pH of from about 1 to about 2.5.
Claim 14
Dependent Claim
22 words
The concentrate according to claim 11, wherein at least one of R.sub. 1, R.sub. 2 and R.sub. 3 is hydroxy lower alkyl.
Claim 15
Dependent Claim
24 words
The concentrate according to claim 11, wherein the dicarboxylic acid is selected from the group consisting of oxalic, malonic, succinic, glutaric and adipic 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) | 1979-11-23 | 1980-05-24 | 1980-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-23 | 1984-05-24 | 1984-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-23 | 1988-05-24 | 1988-11-23 | $7700.00 | Window Closed / Lapsed |