US5143652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduced flammability mixture based on isopropanol
Assignee: Rhodia Chimie SAS
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Filing: 1991-04-26
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Granted: 1992-09-01
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Expires: 2011-04-26
Abstract
Abstract Ternary mixtures of isopropanol, water and a perfluorocarbon boiling at 30° to 70° C., especially perfluoro-n-hexane, have reduced flammability. They can be used for cleaning purposes.
Inventors
- 👤 David S. L. Slinn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:26
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/22; C11D7/26; C11D7/261; C11D7/50; C11D7/5004; C11D7/5018; C23; C23G; C23G5/00; C23G5/02; C23G5/032; C11D7/28
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
66 words
A mixture comprising two phases: (1) a ternary phase having isopropanol as the major ingredient and comprising isopropanol and water substantially saturated with a perfluorocarbon having a boiling point in the range of 30° to 60° C. selected from the group consisting of perfluoro-n-hexane and perfluoromethylcyclopentane; and (2) a ternary phase comprising isopropanol, water and the perfluorocarbon of phase (1), said perfluorocarbon being the major ingredient.
Claim 2
Dependent Claim
66 words
A mixture comprising two phases: (1) a ternary phase having isopropanol as the major ingredient and comprising isopropanol and water substantially saturated with a perfluorocarbon having a boiling point in the range of 30° to 60° C. selected from the group consisting of perfluoro-n-hexane and perfluoromethylcyclopentane; and (2) a ternary phase comprising isopropanol, water and the perfluorocarbon of phase (1), said perfluorocarbon being the major ingredient.
Claim 3
Dependent Claim
33 words
A mixture according to claim 1 in which the phase (1) comprises 1 to 30% by weight of water, based on the combined weight of the isopropanol and the water in said phase.
Claim 4
Dependent Claim
48 words
A mixture according to claim 2 in which the phase (1) comprises, at 20° C., 78 to 92% by weight of isopropanol, 2 to 20% by weight of water, and 2 to 6% by weight of perfluoro-n-hexane, the percentages being based on the total weight of said phase.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-09-01 | 1996-03-02 | 1996-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-01 | 2000-03-02 | 2000-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-01 | 2004-03-02 | 2004-09-01 | $7700.00 | Window Closed / Lapsed |