Patent US2635112A successfully refreshed from Google Patents.
US2635112A
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Process for producing aminomethylphosphonic acid compounds
Assignee: Research Corp
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Filing: 1949-07-28
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Granted: 1953-04-14
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Expires: 1969-07-28
Abstract
No abstract record available.
Inventors
- 👤 Fields Ellis Kirby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:37
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/3804; C07F9/3808; C07F9/40; C07F9/4003; C07F9/4006; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A PROCESS WHICH COMPRISES REACTING A PHOSPHITE DIESTER WITH A REACTANT SELECTED FROM THE GROUP CONSISTING OF (1) A CARBONYL COMPOUND AND AN AMINE HAVING AT LEAST ONE UNSUBSTITUTED AMINO HYDROGEN, (2) AN ALKYLOLAMINE, (3) AN ALKYLIDENEIMINE AND (4) A TETRA-N-SUBSTITUTED ALKYLIDENEDIAMINE, AND RECOVERING THE AMINOMETHYLPHOSPHONIC ACID DIESTERS THEREBY PRODUCED.
Claim 2
Dependent Claim
50 words
A PROCESS WHICH COMPRISES REACTING A PHOSPHITE DIESTER WITH A REACTANT SELECTED FROM THE GROUP CONSISTING OF (1) A CARBONYL COMPOUND AND AN AMINE HAVING AT LEAST ONE UNSUBSTITUTED AMINO HYDROGEN, (2) AN ALKYLOLAMINE, (3) AN ALKYLIDENEIMINE AND (4) A TETRA-N-SUBSTITUTED ALKYLIDENEDIAMINE, AND RECOVERING THE AMINOMETHYLPHOSPHONIC ACID DIESTERS THEREBY PRODUCED.
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) | 1956-04-13 | 1956-10-13 | 1957-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-13 | 1960-10-13 | 1961-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-13 | 1964-10-13 | 1965-04-14 | $7700.00 | Window Closed / Lapsed |