US4250107A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-(Sulfoalkane) amino alkane phosphonic acids and their water-soluble salts
Assignee: BK Giulini Chemie GmbH
•
Filing: 1978-11-06
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Granted: 1981-02-10
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Expires: 1998-11-06
Abstract
Abstract N-(sulfo alkane) amino alkane phosphonic acids or their water-soluble salts are obtained by reacting an alkali metal salt of an amino alkane phosphonic acid with at least one hydrogen atom in the amino group which can be replaced by a sulfo alkane group, in an alkaline medium with an alkane sultone while heating.
Inventors
- 👤 Klaus Sommer
- 👤 Gottfried Schoebel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:25
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/3804; C07F9/3808
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
72 words
A compound of the formula ##STR5## R 1 being hydrogen, methyl or a carboxy lower alkylene group; R 3 being hydrogen or methyl; and R 4 being an alkylene sulfonic acid group of the Formula C n H 2n SO 3 H and n equals 1-14 or 17 wherein R 1 is a carboxy alkylene group or R 3 is methyl or n equals 12-14 or 17; and the water-soluble salts thereof.
Claim 2
Dependent Claim
72 words
A compound of the formula ##STR5## R 1 being hydrogen, methyl or a carboxy lower alkylene group; R 3 being hydrogen or methyl; and R 4 being an alkylene sulfonic acid group of the Formula C n H 2n SO 3 H and n equals 1-14 or 17 wherein R 1 is a carboxy alkylene group or R 3 is methyl or n equals 12-14 or 17; and the water-soluble salts thereof.
Claim 3
Dependent Claim
15 words
A compound according to claim 1 wherein R 1 is a carboxy lower alkylene group.
Claim 4
Dependent Claim
4 words
N-(sulfo butane)-2-carboxy-1-amino ethane-1,1-diphosphonic acid.
Claim 5
Dependent Claim
4 words
N-(sulfo butane)-2-carboxy-1-amino ethane-1,1-diphosphonic acid.
Claim 6
Dependent Claim
11 words
A compound according to claim 1 wherein R 3 is methyl.
Claim 7
Dependent Claim
6 words
N-methyl-N-(sulfo propane) amino methane diphosphonic acid.
Claim 8
Dependent Claim
6 words
N-methyl-N-(sulfo propane) amino methane diphosphonic acid.
Claim 9
Dependent Claim
12 words
A compound according to claim 1 wherein n is 12-14 or 17.
Claim 10
Dependent Claim
4 words
N-(sulfo dodecane)-1-amino ethane-1,1-diphosphonic acid.
Claim 11
Dependent Claim
4 words
N-(sulfo dodecane)-1-amino ethane-1,1-diphosphonic acid.
Claim 12
Dependent Claim
6 words
N-(sulfo tetradecane) amino methane diphosphonic acid.
Claim 13
Dependent Claim
6 words
N-(sulfo tetradecane) amino methane diphosphonic acid.
Claim 14
Dependent Claim
6 words
N-(sulfo heptadecane) amino methane diphosphonic acid.
Claim 15
Dependent Claim
6 words
N-(sulfo heptadecane) amino methane diphosphonic acid.
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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) | 1984-02-10 | 1984-08-11 | 1985-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-10 | 1988-08-11 | 1989-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-10 | 1992-08-11 | 1993-02-10 | $7700.00 | Window Closed / Lapsed |