US3728268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixtures of 1,1,2-trichloro-1,2,2-trifluoroethane,ethanol and acetone and a ternary azeotrope thereof
Assignee: EIDP Inc
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Filing: 1970-12-11
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Granted: 1973-04-17
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Expires: 1990-12-11
Abstract
Abstract A MIXTURE OF 1,1,2-TRICHLORO-1,2,2-TRIFLUORETHANE, ETHANOL AND ACETONE AND A TERNARY AZEOTROPE THEREOF, SAID MIXTURE CONTAINING FROM ABOUT 82.3 TO ABOUT 89.2 WEIGHT PERCENT 1,1,2-TRICHLORO-1,2,2-TRIFLUOROETHANE AND FROM ABOUT 0.8 TO ABOUT 4.5 WEIGHT PERCENT ETHANOL AND SAID AZEOTROPE CONTAINING ABOUT 86.4 WEIGHT PERCENT 1,1,2TRICHLORO-1,2,2-TRIFLUOROETHANE AND ABOUT 1.6 WEIGHT PERCENT ETHANOL AND HAVING A MINIMUM BOILING POINT OF ABOUT 43.6*C.
Inventors
- 👤 J Burt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:25
CPC Classifications
C; C09; C09D; C09D9/00; C09D9/005; C11; C11D; C11D7/00; C11D7/50; C11D7/5036; C11D7/5068; C11D7/5077; C11D7/5086; C23; C23G; C23G5/00; C23G5/02; C23G5/028; C23G5/02809; C23G5/02812; C23G5/02816; C23G5/02819
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |