Patent US3159669A successfully refreshed from Google Patents.
US3159669A
Expired / Lapsed
US
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Process for phosphoramidic acid derivatives
Assignee: Pennwalt Corp
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Filing: 1960-04-14
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Granted: 1964-12-01
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Expires: 1980-04-14
Abstract
No abstract record available.
Inventors
- 👤 Francis L Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:57
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A PROCESS FOR THE PREPARATION OF N-ARYL PHOSPHORAMIDIC ACIDS AND THEIR MONO-ARYL ESTERS WHICH COMPRISES REACTING AT A TEMPERATURE BETWEEN ABOUT 130* AND 250*C. A MONO-ARYL AMINE SELECTED FROM THE CLASS OF PRIMARY AND SECONDARY MONO-ARYL AMINE CONTAINING 6 TO 10 CARBON ATOMS AND HAVING A PKA VALUE BETWEEN ABOUT 4 AND ABOUT 6 SELECTED FROM THE CLASS CONSISTING OF PRIMARY AMINES, N-LOWER ALKYL SECONDARY AMINES, AND RING-SUBSTITUTED HALO DERIVATIVES OF SAID PRIMARY AND SECONDARY AMINES, WITH A PHOSPHOROUS COMPOUND OF THE STRUCTURE
Claim 2
Dependent Claim
83 words
A PROCESS FOR THE PREPARATION OF N-ARYL PHOSPHORAMIDIC ACIDS AND THEIR MONO-ARYL ESTERS WHICH COMPRISES REACTING AT A TEMPERATURE BETWEEN ABOUT 130* AND 250*C. A MONO-ARYL AMINE SELECTED FROM THE CLASS OF PRIMARY AND SECONDARY MONO-ARYL AMINE CONTAINING 6 TO 10 CARBON ATOMS AND HAVING A PKA VALUE BETWEEN ABOUT 4 AND ABOUT 6 SELECTED FROM THE CLASS CONSISTING OF PRIMARY AMINES, N-LOWER ALKYL SECONDARY AMINES, AND RING-SUBSTITUTED HALO DERIVATIVES OF SAID PRIMARY AND SECONDARY AMINES, WITH A PHOSPHOROUS COMPOUND OF THE STRUCTURE
References Cited (Backward Citations)
US2587549A
Cited
US2842527A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |