US3630926A
Expired / Lapsed
US
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Azeotropic composition of 1 1 2 2-tetrachloro - 1 2-difluoroethane and trichloroethylene
Assignee: Union Carbide Corp
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Filing: 1968-12-09
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Granted: 1971-12-28
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Expires: 1988-12-09
Abstract
Abstract THE DISCLOSURE RELATES TO AZEOTROPIC MIXTURES OF TETRACHLORODIFLUOROETHANE AND TRICHLOROETHYLENE. IT HAS BEEN DISCOVERED THAT THIS AZEOTROPE MAY BE USED IN SOLVENT VAPOR CLEANING AND DEGREASING APPLICATIONS.
Inventors
- 👤 Jan R Haase
- 👤 John Allan Schofield
- 👤 Roger A Delano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:49
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/50; C11D7/5036; C11D7/504; C11D7/5059; C23; C23G; C23G5/00; C23G5/02; C23G5/028; C23G5/02806
Claims Analysis
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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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |