Patent US2810757A successfully refreshed from Google Patents.
US2810757A
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Preparation of octaalkylpyrophosphoramides
Assignee: Union Carbide Corp
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Filing: 1954-11-17
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Granted: 1957-10-22
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Expires: 1974-11-17
Abstract
No abstract record available.
Inventors
- 👤 William M Lanham
- 👤 Percy L Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:36
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
69 words
PROCESS FOR MAKING AN OCTAALKYLPYROPHOSPHOROMIDE HAVING ONE TO FOUR CARBON ATOMS IN EACH ALKYL GROUP, WHICH COMPRISES REACTING A TETRAALKYLDIAMIDOCHLOROPHOSPHATE WITH AN ANHYDROUS ALKALI METAL CARBONATE IN A MOLAR RATIO OF MORE THAN 0.5 MOL OF THE ALKALI METAL CARBONATE PER MOL OF THE SAID CHLOROPHOSPHATE, AT TEMPERATURES WITHIN THE RANGE FROM ABOUT 50*C. TO ABOUT 125* C., AND RECOVERING FROM THE RESULTANT REACTION MIXTURE THE OCTAALKYLPYROPHOSPHORAMIDE THEREBY PRODUCED.
Claim 2
Dependent Claim
69 words
PROCESS FOR MAKING AN OCTAALKYLPYROPHOSPHOROMIDE HAVING ONE TO FOUR CARBON ATOMS IN EACH ALKYL GROUP, WHICH COMPRISES REACTING A TETRAALKYLDIAMIDOCHLOROPHOSPHATE WITH AN ANHYDROUS ALKALI METAL CARBONATE IN A MOLAR RATIO OF MORE THAN 0.5 MOL OF THE ALKALI METAL CARBONATE PER MOL OF THE SAID CHLOROPHOSPHATE, AT TEMPERATURES WITHIN THE RANGE FROM ABOUT 50*C. TO ABOUT 125* C., AND RECOVERING FROM THE RESULTANT REACTION MIXTURE THE OCTAALKYLPYROPHOSPHORAMIDE 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) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |