Patent US4020101A successfully refreshed from Google Patents.
US4020101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
α-Alkyl-phosphonosuccinic acid compounds and sequestering compositions containing them
Assignee: Bayer AG
•
Filing: 1975-01-20
•
Granted: 1977-04-26
•
Expires: 1995-01-20
Abstract
Abstract Certain novel α-alkyl-phosphonosuccinic acid compounds of the formula ##STR1## in which R is lower alkyl, or alkenyl or alkynyl, cycloalkyl, or aralkyl are particularly suitable as sequestering agents, e.g., for incorporation into cleansing compositions.
Inventors
- 👤 Hans Geffers
- 👤 Walter Radt
- 👤 Reinhard Schliebs
- 👤 Hartmut Schulz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:25
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/36; C11D3/365; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/14; C02F5/145; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/3804; C07F9/3808
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
19 words
α-Alkyl-phosphonosuccinic acid compound of the formula ##STR4## in which R is lower alkyl, or lower alkenyl or lower alkynyl.
Claim 2
Dependent Claim
19 words
α-Alkyl-phosphonosuccinic acid compound of the formula ##STR4## in which R is lower alkyl, or lower alkenyl or lower alkynyl.
Claim 3
Dependent Claim
17 words
Compound as claimed in claim 1 wherein R is alkyl of from one to four carbon atoms.
Claim 4
Dependent Claim
21 words
Compound as claimed in claim 1 wherein R is lower alkenyl or lower alkynyl of from two to four carbon atoms.
Claim 5
Dependent Claim
10 words
Compound as claimed in claim 1 designated α-methyl phosphonosuccinic acid.
Claim 6
Dependent Claim
10 words
Compound as claimed in claim 1 designated α-ethyl phosphonosuccinic acid.
Claim 7
Dependent Claim
9 words
Compound as claimed in claim 1 designated α-allyl-phosphonosuccinic acid.
Claim 8
Dependent Claim
9 words
Compound as claimed in claim 1 designated α-butyl-phosphonosuccinic 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) | 1980-04-25 | 1980-10-25 | 1981-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-25 | 1984-10-25 | 1985-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-25 | 1988-10-25 | 1989-04-26 | $7700.00 | Window Closed / Lapsed |