US4098849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alpha-amino phosphonic acids
Assignee: Baker Petrolite LLC
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Filing: 1976-10-12
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Granted: 1978-07-04
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Expires: 1996-10-12
Abstract
Abstract This invention relates to a process for preparing α-amino phosphonic acid derivatives which comprises reacting a nitrile with a phosphite ester under hydrogenation conditions; and to the α-amino phosphonic acid derivatives formed and uses thereof.
Inventors
- 👤 Derek Redmore
- 👤 Neil E. S. Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:12
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; C07F9/40; C07F9/4003; C07F9/4006
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
30 words
Compositions of the formulas ##STR15## where R 1 is an aryl radical selected from the group consisting of phenyl, alkyl phenyl or halophenyl and R 2 is an ester moiety.
Claim 2
Dependent Claim
30 words
Compositions of the formulas ##STR15## where R 1 is an aryl radical selected from the group consisting of phenyl, alkyl phenyl or halophenyl and R 2 is an ester moiety.
Claim 3
Dependent Claim
15 words
The compositions of claim 1 where the aryl radical is phenyl, methyl phenyl or chlorophenyl.
Claim 4
Dependent Claim
10 words
The compositions of claim 1 where R 1 is phenyl.
Claim 5
Dependent Claim
10 words
The compositions of claim 2 where R 1 is methylphenyl.
Claim 6
Dependent Claim
10 words
The compositions of claim 2 where R 1 is chlorophenyl.
Claim 7
Dependent Claim
8 words
Compositions of claim 2 having the formula ##STR16##
Claim 8
Dependent Claim
8 words
Compositions of claim 2 having the formula ##STR17##
Claim 9
Dependent Claim
8 words
Compositions of claim 2 having the formula ##STR18##
Claim 10
Dependent Claim
8 words
Compositions of claim 2 having the formula ##STR19##
Claim 11
Dependent Claim
8 words
Compositions of claim 2 having the formula ##STR20##
References Cited (Backward Citations)
US3288846A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-03 | 1982-01-02 | 1982-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-03 | 1986-01-02 | 1986-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-03 | 1990-01-02 | 1990-07-04 | $7700.00 | Window Closed / Lapsed |