Patent US2676975A successfully refreshed from Google Patents.
US2676975A
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Process for production of phosphate esters
Assignee: Celanese Corp
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Filing: 1950-08-31
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Granted: 1954-04-27
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Expires: 1970-08-31
Abstract
No abstract record available.
Inventors
- 👤 Fortess Fred
- 👤 Jr Conrad Hohing
- 👤 Rio Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:25
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/244; D06M13/282; D06M13/292; C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; D06M7/00; D06M2200/00; D06M2200/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
PROCESS FOR THE PRODUCTION OF PHOSPHATE ESTERS, WHICH COMPRISES REACTING A HYDROXYHYDROCARBON WITH A DISPERSION IN MINERAL OIL OF A SOLID, ESTER-FORMING PHOSPHORUS ACID DERIVATIVE AT A TEMPERATURE OF ABOUT 50 TO 100* C. FOR A PERIOD OF ABOUT 10 TO 60 MINUTES.
Claim 2
Dependent Claim
43 words
PROCESS FOR THE PRODUCTION OF PHOSPHATE ESTERS, WHICH COMPRISES REACTING A HYDROXYHYDROCARBON WITH A DISPERSION IN MINERAL OIL OF A SOLID, ESTER-FORMING PHOSPHORUS ACID DERIVATIVE AT A TEMPERATURE OF ABOUT 50 TO 100* C. FOR A PERIOD OF ABOUT 10 TO 60 MINUTES.
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) | 1957-04-26 | 1957-10-26 | 1958-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-26 | 1961-10-26 | 1962-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-26 | 1965-10-26 | 1966-04-27 | $7700.00 | Window Closed / Lapsed |