Patent US2639292A successfully refreshed from Google Patents.
US2639292A
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Method for preparing mixed alkyl esters of phosphoric acid
Assignee: Eastman Kodak Co
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Filing: 1951-01-26
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Granted: 1953-05-19
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Expires: 1971-01-26
Abstract
No abstract record available.
Inventors
- 👤 Kent C Brannock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:22
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A METHOD FOR REPLACING, AT LEAST PARTIALLY, THE ALKYL GROUPS OF A TRIALKY PHOSPHATE THE ALKYL OF WHICH IS OF 1-10 CARBON ATOMS WHICH COMPRISES REACTING THEREWITH AT 120-200* C. A COMPOUND SELECTED FROM THE GROUP OF THE ALKYL CHLOROSULFINATES AND THE ALKYL CHLOROFORMATES, THE ALKYL GROUPS OF WHICH ARE OF 1-10 CARBON ATOMS AND DIFFER FORM THOSE OF THE TRIALKYL PHOSPHATE, FOR A TIME SUFFICIENT TO REPLACE SOME OF THE ALKYL GROUPS OF THE TRIALKYL PHOSPHATE WITH ALKYL GROUPS FROM THE OTHER REACTANT USED.
Claim 2
Independent Claim
85 words
A METHOD FOR REPLACING, AT LEAST PARTIALLY, THE ALKYL GROUPS OF A TRIALKY PHOSPHATE THE ALKYL OF WHICH IS OF 1-10 CARBON ATOMS WHICH COMPRISES REACTING THEREWITH AT 120-200* C. A COMPOUND SELECTED FROM THE GROUP OF THE ALKYL CHLOROSULFINATES AND THE ALKYL CHLOROFORMATES, THE ALKYL GROUPS OF WHICH ARE OF 1-10 CARBON ATOMS AND DIFFER FORM THOSE OF THE TRIALKYL PHOSPHATE, FOR A TIME SUFFICIENT TO REPLACE SOME OF THE ALKYL GROUPS OF THE TRIALKYL PHOSPHATE WITH ALKYL GROUPS FROM THE OTHER REACTANT USED.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |