US2671109A
Expired / Lapsed
US
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Preparation of bis-dialkylamino phosphonous anhydrides
Assignee: Pest Control Ltd
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Filing: 1949-11-16
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Granted: 1954-03-02
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Expires: 1969-11-16
Abstract
No abstract record available.
Inventors
- 👤 Hartley Gilbert Spencer
- 👤 Pound Denis William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:49
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/22; C07F9/24; C07F9/2404; C07F9/2433; C07F9/245
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A PROCESS FOR THE MANUFACTURE OF A LOWER BIS-DIALKYLAMINO PHOSPHONOUS ANHYDRIDE WHICH COMPRISES REACTING ABOUT TWO MOLS OF AN ANHYDROUS LOWER DIALKYLAMINE WITH A SOLUTION OF ABOUT ONE MOL OF PHOSPHORUS OXYCHLORIDE IN AN INERT SOLVENT IN THE PRESENCE OF AT LEAST TWO MOLS OF A TERTIARY AMINE OF A STRENGTH AT LEAST EQUAL TO THAT OF PYRIDINE, AND REACTING THE PRODUCT FORMED WITHOUT SEPARATION THEREOF FROM THE REACTION MIXTURE WITH ABOUT ONE-HALF MOL OF WATER IN THE PRESENCE OF AN AMOUNT OF SAID TERTIARY AMINE EQUIVALENT TO AT LEAST ONE MOL THEREOF.
Claim 2
Dependent Claim
93 words
A PROCESS FOR THE MANUFACTURE OF A LOWER BIS-DIALKYLAMINO PHOSPHONOUS ANHYDRIDE WHICH COMPRISES REACTING ABOUT TWO MOLS OF AN ANHYDROUS LOWER DIALKYLAMINE WITH A SOLUTION OF ABOUT ONE MOL OF PHOSPHORUS OXYCHLORIDE IN AN INERT SOLVENT IN THE PRESENCE OF AT LEAST TWO MOLS OF A TERTIARY AMINE OF A STRENGTH AT LEAST EQUAL TO THAT OF PYRIDINE, AND REACTING THE PRODUCT FORMED WITHOUT SEPARATION THEREOF FROM THE REACTION MIXTURE WITH ABOUT ONE-HALF MOL OF WATER IN THE PRESENCE OF AN AMOUNT OF SAID TERTIARY AMINE EQUIVALENT TO AT LEAST ONE MOL THEREOF.
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) | 1957-03-01 | 1957-08-31 | 1958-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-01 | 1961-08-31 | 1962-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-01 | 1965-08-31 | 1966-03-02 | $7700.00 | Window Closed / Lapsed |