US3288846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Processes for preparing organophosphonic acids
Assignee: Monsanto Co
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Filing: 1961-11-13
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Granted: 1966-11-29
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Expires: 1981-11-13
Abstract
No abstract record available.
Inventors
- 👤 Riyad R Irani
- 👤 Moedritzer Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:13
CPC Classifications
D; D06; D06L; D06L1/00; D06L1/02; D06L1/04; C; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/14; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/3804; C07F9/3808; C07F9/3817; C07F9/40; C07F9/4003; C07F9/4006; C07F9/4009; C11; C11D; C11D1/00; C11D1/02; C11D1/34; C11D1/342; C11D3/00; C11D3/16; C11D3/36; C11D3/364; C11D3/43; C22; C22B; C22B3/00; C22B3/20; C22B3/26; C22B3/38; C22B3/384; C22B3/3844; C22B3/386; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A PROCESS WHICH COMPRISES FORMING AN AQUEOUS MIXTURE HAVING A PH BELOW ABOUT 4 CONTAINTING A NITROGENOUS MATERIAL SELECTED FROM THE GROUP CONSISTING OF AMMONIA PRIMARY AMINES, AND SECONDARY AMINES; AN ORGANIC CARBONYL COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALDEHYDES AND KETONES; AND ORTHOPHOSPHOROUS ACID, AND SUBJECTING SAID MIXTURE TO TEMPERATURES ABOVE ABOUT 70*C., WHEREBY AN AMINOALKYLPHOSPHONIC ACID COMPOUND HAVING AT LEAST ONE N-C-P LINKAGE (WHEREIN SAID P IS FROM SAID ORTHOPHOSPHOROUS ACID) IS FORMED.
Claim 2
Dependent Claim
76 words
A PROCESS WHICH COMPRISES FORMING AN AQUEOUS MIXTURE HAVING A PH BELOW ABOUT 4 CONTAINTING A NITROGENOUS MATERIAL SELECTED FROM THE GROUP CONSISTING OF AMMONIA PRIMARY AMINES, AND SECONDARY AMINES; AN ORGANIC CARBONYL COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALDEHYDES AND KETONES; AND ORTHOPHOSPHOROUS ACID, AND SUBJECTING SAID MIXTURE TO TEMPERATURES ABOVE ABOUT 70*C., WHEREBY AN AMINOALKYLPHOSPHONIC ACID COMPOUND HAVING AT LEAST ONE N-C-P LINKAGE (WHEREIN SAID P IS FROM SAID ORTHOPHOSPHOROUS ACID) IS FORMED.
References Cited (Backward Citations)
US2635112A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |