US2636048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing trialkyl phosphate esters
Assignee: Victor Chemical Works
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Filing: 1949-04-07
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Granted: 1953-04-21
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Expires: 1969-04-07
Abstract
No abstract record available.
Inventors
- 👤 Toy Arthur Dock Fon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:18
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/025; C07F9/06; C07F9/08; C07F9/09; C07F9/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A METHOD OF PRODUCING A TRIALKYL PHOSPHATE ESTER WHICH COMPRISES REACTING PHOSPHORUS OXYCHLORIDE WITH AN ALIPHATIC ALCOHOL UNDER APPROXIMATELY ANHYDROUS CONDITION, REMOVINF THE LIBERATED HYDROGEN CHLORIDE AND EXCESS ALCOHOL AND CONTACTING THE LIQUID REACTION MIXTURE WITH AN ANION EXCHANGE RESIN WHEREBY ACID ESTERS AND AEIDIC IMPURITIES ARE ADSORBED LEAVING A SUBSTANTIALLY PURE TRIALKYL PHOSPHATE ESTER.
Claim 2
Independent Claim
55 words
A METHOD OF PRODUCING A TRIALKYL PHOSPHATE ESTER WHICH COMPRISES REACTING PHOSPHORUS OXYCHLORIDE WITH AN ALIPHATIC ALCOHOL UNDER APPROXIMATELY ANHYDROUS CONDITION, REMOVINF THE LIBERATED HYDROGEN CHLORIDE AND EXCESS ALCOHOL AND CONTACTING THE LIQUID REACTION MIXTURE WITH AN ANION EXCHANGE RESIN WHEREBY ACID ESTERS AND AEIDIC IMPURITIES ARE ADSORBED LEAVING A SUBSTANTIALLY PURE TRIALKYL PHOSPHATE ESTER.
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) | 1956-04-20 | 1956-10-20 | 1957-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-20 | 1960-10-20 | 1961-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-20 | 1964-10-20 | 1965-04-21 | $7700.00 | Window Closed / Lapsed |