US4029697A
Expired / Lapsed
US
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N-acyl-1-amino alkane-1,1-diphosphonic acid compounds, process of making same, and compositions for and method of using same
Assignee: Joh A Benckiser GmbH
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Filing: 1976-04-15
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Granted: 1977-06-14
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Expires: 1996-04-15
Abstract
Abstract N-acyl-1-amino alkane-1,1-diphosphonic acids or their alkali metal salts are highly effective scale and deposit formation preventing, metal ion complexing, sequestering, and anti-corrosive agents which can be used with great advantage in washing and cleaning fluids and detergent preparations. Such N-acyl-1-amino alkane-1,1-diphosphonic acids are prepared, for instance, by acylating the corresponding 1-amino alkane-1,1-diphosphonic acids or by hydrolyzing the corresponding (1,1-diphosphono alkane) acylamidines.
Inventors
- 👤 Friedrich Krueger
- 👤 Walter Michel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:55
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/167; C23F11/1676; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/14; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/3804; C07F9/3839; C07F9/3873
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
38 words
An N-acyl-1-amino alkane-1,1-diphosphonic acid of the formula ##STR4## in which R, R', and R" are hydrogen or lower alkyl and R 1 , r 2 , r 3 , and R 4 are hydrogen or an alkali metal.
Claim 2
Dependent Claim
38 words
An N-acyl-1-amino alkane-1,1-diphosphonic acid of the formula ##STR4## in which R, R', and R" are hydrogen or lower alkyl and R 1 , r 2 , r 3 , and R 4 are hydrogen or an alkali metal.
Claim 3
Dependent Claim
42 words
The compound of claim 1, in which R, r', and R" are hydrogen and R 1 , r 2 , r 3 , and R 4 are hydrogen or sodium metal, said compound being N-formylamino methane diphosphonic acid or its sodium salts.
Claim 4
Dependent Claim
45 words
The compound of claim 1, in which R is methyl, R' is hydrogen, and R" is ethyl, while R 1 , r 2 , r 3 , and R 4 are hydrogen or sodium metal, said compound being N-propionyl-1-amino ethane-1,1-diphosphonic acid or its sodium salts.
Claim 5
Dependent Claim
17 words
The compound of claim 1, in which R and R" are hydrogen and R' is methyl, while
Claim 6
Dependent Claim
28 words
R 1 , R 2 , R 3 , and R 4 are hydrogen or sodium metal, said compound being N-formyl-N-methylamino methane diphosphoric acid or its doium salts.
Claim 7
Dependent Claim
28 words
R 1 , R 2 , R 3 , and R 4 are hydrogen or sodium metal, said compound being N-formyl-N-methylamino methane diphosphoric acid or its doium salts.
Claim 8
Dependent Claim
45 words
The compound of claim 1, in which R is ethyl, R' is hydrogen, and R" is methyl, while R 1 , r 2 , r 3 , and R 4 are hydrogen or sodium metal, said compound being N-acetyl-1-amino propane-1,1-diphosphonic acid or its sodium salts.
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) | 1980-06-13 | 1980-12-13 | 1981-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-13 | 1984-12-13 | 1985-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-13 | 1988-12-13 | 1989-06-14 | $7700.00 | Window Closed / Lapsed |