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US3729424A
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US
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Tertiary azeotropic cleaning solution based on tetrachlorodifluoroethane
Assignee: Union Carbide Corp
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Filing: 1971-07-28
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Granted: 1973-04-24
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Expires: 1991-07-28
Abstract
Abstract A TERNARY AZEOTROPE OF TETRACHLORODIFLUOROETHANE, DICHLOROETHANE AND METHANOL HAS SUPERIOR PROPERTIES FOR SOLVENT VAPOR CLEANING AND DEGREASING APPLICATIONS.
Inventors
- 👤 J Schofield
- 👤 R Delano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:40
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; C11D7/5086; C23G5/02806
Claims Analysis
Total Claims: 0
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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) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |