US2870192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tricresylphosphate process
Assignee: Beazer East Inc
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Filing: 1957-12-30
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Granted: 1959-01-20
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Expires: 1977-12-30
Abstract
No abstract record available.
Inventors
- 👤 Kurt P Bonstedt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:21
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A METHOD OF MAKING TRICRESYLPHOSPHATE COMPRISING CONTACTING SUBSTANTIALLY ANHYDROUS CRESYLIC ACID AND SUBSTANTIALLY ANHYDROUS PHOSPHORUS OXYCHLORIDE IN AT LEAST A 3:1 MOLE RATIO IN THE PRESENCE OF AN ANHYDROUS CONDENSATION CATALYST, HEATING THE REACTION MIXTURE UNTIL ABOUT 90 TO 96% COMPLETION OF THE REACTION OCCURS, ADDING TO SAID MIXTURE ABOUT 3 TO 12% BY WEIGHT OF FRESH CRESYLIC ACID BASED ON THE WEIGHT OF CRESYLIC ACID ORIGINALLY PRESENT, CONTINUING HEATING UNTIL THE COMPLETION OF THE REACTION AND RECOVERING TRICRESYLPHOSPHATE FROM SAID MIXTURE.
Claim 2
Independent Claim
82 words
A METHOD OF MAKING TRICRESYLPHOSPHATE COMPRISING CONTACTING SUBSTANTIALLY ANHYDROUS CRESYLIC ACID AND SUBSTANTIALLY ANHYDROUS PHOSPHORUS OXYCHLORIDE IN AT LEAST A 3:1 MOLE RATIO IN THE PRESENCE OF AN ANHYDROUS CONDENSATION CATALYST, HEATING THE REACTION MIXTURE UNTIL ABOUT 90 TO 96% COMPLETION OF THE REACTION OCCURS, ADDING TO SAID MIXTURE ABOUT 3 TO 12% BY WEIGHT OF FRESH CRESYLIC ACID BASED ON THE WEIGHT OF CRESYLIC ACID ORIGINALLY PRESENT, CONTINUING HEATING UNTIL THE COMPLETION OF THE REACTION AND RECOVERING TRICRESYLPHOSPHATE FROM SAID MIXTURE.
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) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |