US4002676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroxyethercarboxylic acids
Assignee: Henkel AG and Co KGaA
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Filing: 1972-01-28
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Granted: 1977-01-11
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Expires: 1992-01-28
Abstract
Abstract The present invention relates to a process for producing novel hydroxyether carboxylic acids and their salts containing at least one glycolic acid ether and at least two carboxylic acids as well as to these compounds per se.
Inventors
- 👤 Gerhard Borggrefe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:33
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/20; C11D3/2075; C11D3/2089; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C07; C07C; C07C59/00; C07C59/235; C07C59/305; C07D; C07D319/00; C07D319/10; C07D319/12
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
60 words
A hydroxyethercarboxylic acid compound selected from the group consisting of (1) a compound selected from the group consisting of 1,2-bis-O-carboxymethyl glycerine, mono-O-carboxymethyl glyceric acid, mono-O-carboxymethyl tartaric acid, mono-O-carboxymethyl erythric acid, mono-O-carboxymethyl-1,2,3-trihydroxyglutaric acid, and 1,2-bis-O-carboxymethyl-1,2,3-trihydroxyglutaric acid; and (2) a salt of said compound selected from the group consisting of alkali metal salts, ammonium salts, lower alkylamine salts, and lower akylolamine salts.
Claim 2
Dependent Claim
60 words
A hydroxyethercarboxylic acid compound selected from the group consisting of (1) a compound selected from the group consisting of 1,2-bis-O-carboxymethyl glycerine, mono-O-carboxymethyl glyceric acid, mono-O-carboxymethyl tartaric acid, mono-O-carboxymethyl erythric acid, mono-O-carboxymethyl-1,2,3-trihydroxyglutaric acid, and 1,2-bis-O-carboxymethyl-1,2,3-trihydroxyglutaric acid; and (2) a salt of said compound selected from the group consisting of alkali metal salts, ammonium salts, lower alkylamine salts, and lower akylolamine salts.
Claim 3
Dependent Claim
51 words
A hydroxyethercarboxylic acid compound selected from the group consisting of (1) a compound selected from the group consisting of mono-O-carboxymethyl-tartaric acid, mono-O-carboxymethyl-1,2,3-trihydroxyglutaric acid, and 1,2-bis-O-carboxymethyl-1,2,3-trihydroxyglutaric acid; and (2) a salt of said compound selected from the group consisting of alkali metal salts, ammonium salts, lower alkylamine salts, and lower alkylolamine salts.
Claim 4
Dependent Claim
51 words
A hydroxyethercarboxylic acid compound selected from the group consisting of (1) a compound selected from the group consisting of mono-O-carboxymethyl-tartaric acid, mono-O-carboxymethyl-1,2,3-trihydroxyglutaric acid, and 1,2-bis-O-carboxymethyl-1,2,3-trihydroxyglutaric acid; and (2) a salt of said compound selected from the group consisting of alkali metal salts, ammonium salts, lower alkylamine salts, and lower alkylolamine salts.
Claim 5
Dependent Claim
2 words
Mono-O-carboxymethyl-tartaric acid.
Claim 6
Dependent Claim
2 words
Mono-O-carboxymethyl-tartaric acid.
Claim 7
Dependent Claim
1 words
1,2-bis-O-carboxymethyl-glycerine.
Claim 8
Dependent Claim
1 words
1,2-bis-O-carboxymethyl-glycerine.
Claim 9
Dependent Claim
3 words
Mono-O-carboxymethyl glyceric acid.
Claim 10
Dependent Claim
3 words
Mono-O-carboxymethyl glyceric acid.
Claim 11
Dependent Claim
3 words
Mono-O-carboxymethyl erythric acid.
Claim 12
Dependent Claim
3 words
Mono-O-carboxymethyl erythric acid.
Claim 13
Dependent Claim
2 words
Mono-O-carboxymethyl-1,2,3-trihydroxyglutaric acid.
Claim 14
Dependent Claim
2 words
Mono-O-carboxymethyl-1,2,3-trihydroxyglutaric acid.
Claim 15
Dependent Claim
2 words
1,2-bis-O-carboxymethyl-1,2,3-trihydroxyglutaric acid.
Claim 16
Dependent Claim
2 words
1,2-bis-O-carboxymethyl-1,2,3-trihydroxyglutaric 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) | 1980-01-11 | 1980-07-12 | 1981-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-11 | 1984-07-12 | 1985-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-11 | 1988-07-12 | 1989-01-11 | $7700.00 | Window Closed / Lapsed |