Patent US4688255A successfully refreshed from Google Patents.
US3554918A
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Azeotropic composition
Assignee: Union Carbide Corp
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Filing: 1967-10-24
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Granted: 1971-01-12
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Expires: 1987-10-24
Abstract
Abstract THE DISCLOSURE ALSO RELATES TO TERNARY AZEOTROPES OF TETRACHLORODIFLUOROETHANE AND TRICHLOROETHYLENE WITH ISOPROPANOL.
Inventors
- 👤 John Allan Schofield
- 👤 Roger A Delano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:37
CPC Classifications
C; C23; C23G; C23G5/00; C23G5/02; C23G5/028; C23G5/02809; C23G5/02812; C23G5/02816; C23G5/02822; C11; C11D; C11D7/00; C11D7/50; C11D7/5036; C11D7/5068; C11D7/5077; C11D7/5081; C23G5/02806
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |