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US3836474A
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Novel non-flammable azeotrope solvent compositions
Assignee: Honeywell International Inc
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Filing: 1972-07-10
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Granted: 1974-09-17
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Expires: 1992-07-10
Abstract
Abstract TETRACHLORODIFLUOROETHANE (SYM.-, ASYM.-, AND MIXTURES THEREOF) NITROMETHANE, WATER AND ISOPROPANOL OR SECONDARY BUTANOL FORM QUATERNARY AZEOTROPIC MIXTURES WHICH ARE USEFUL AS DRY CLEANING SOLVENTS AND ARE PARTICULARLY USEFUL FOR THE REMOVAL OF HARD-TO-REMOVE STAINS FROM LEATHER.
Inventors
- 👤 O Barton
- 👤 K Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:19
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/50; C11D7/5036; C11D7/5068; C11D7/5095; D; D06; D06L; D06L1/00; D06L1/02; D06L1/04
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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |