US3737389A
Expired / Lapsed
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Azeotropic composition
Assignee: Union Carbide Corp
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Filing: 1970-04-13
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Granted: 1973-06-05
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Expires: 1990-04-13
Abstract
Abstract THIS INVENTION RELATES TO AZEOTROPIC MIXTURES OF TETRACHLORODIFLUOROETHANE AND METHYLPROPYLEKETONE.
Inventors
- 👤 J Clark
- 👤 C Rectenwald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:59
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/50; C11D7/5036; C11D7/5068; C11D7/5077; C11D7/5081; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C09K5/041; C09K5/044; C23; C23G; C23G5/00; C23G5/02; C23G5/032; C09K2205/00; C09K2205/10; C09K2205/102; C09K2205/108; C09K2205/32
Claims Analysis
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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) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |