US5580906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ternary azeotropic compositions
Assignee: EIDP Inc
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Filing: 1995-05-19
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Granted: 1996-12-03
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Expires: 2015-05-19
Abstract
Abstract Azeotropic or azeotrope-like compositions of effective amounts of 1,1,1,2,3,4,4,5,5,5-decafluoropentane, heptane and an alcohol such as methanol, ethanol, n-propanol or isopropanol, to form an azeotropic or azeotrope-like composition are disclosed that are useful as cleaning agents, refrigerants, aerosol propellants, heat transfer media, gaseous dielectrics, fire extinguishing agents, expansion agents for polyolefins and polyurethanes and as power cycle working fluids.
Inventors
- 👤 Abid N. Merchant
- 👤 Barbara H. Minor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:17
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/30; C09K5/00; C09K5/02; C09K5/04; C09K5/041; C09K5/044; C09K5/045; C11; C11D; C11D7/00; C11D7/50; C11D7/5036; C11D7/5068; C11D7/5077; C11D7/5081; C23; C23G; C23G5/00; C23G5/02; C23G5/028; C23G5/02803; C09K2205/00; C09K2205/10; C09K2205/102; C09K2205/12; C09K2205/32
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
33 words
A composition comprising effective amounts of 1,1,1,2,3,4,4,5,5,5-decafluoropentane, heptane and an alcohol selected from the group consisting of methanol, ethanol, n-propanol and isopropanol, to form an azeotropic or azeotrope-like composition at substantially atmospheric pressure.
Claim 2
Dependent Claim
33 words
A composition comprising effective amounts of 1,1,1,2,3,4,4,5,5,5-decafluoropentane, heptane and an alcohol selected from the group consisting of methanol, ethanol, n-propanol and isopropanol, to form an azeotropic or azeotrope-like composition at substantially atmospheric pressure.
Claim 3
Dependent Claim
85 words
The composition of claim 1, consisting essentially of 81.9 to 89.9 weight percent 1,1,1,2,3,4,4,5,5,5-decafluoropentane, 4.8 to 9.8 weight percent heptane, and 4.8 to 8.8 weight percent methanol; 89.0 to 92.0 weight percent 1,1,1,2,3,4,4,5,5,5-decafluoropentane, 4.4 to 6.4 weight percent heptane, and 3.6 to 4.6 weight percent ethanol; 91.6 to 95.6 weight percent 1,1,1,2,3,4,4,5,5,5-decafluoropentane, 4.1 to 7.1 weight percent heptane, and 0.1 to 1.8 weight percent n-propanol; and 89.8 to 93.8 weight percent 1,1,1,2,3,4,4,5,5,5-decafluoropentane, 4.2 to 6.2 weight percent heptane, and 1.5 to 4.5 weight percent isopropanol.
Claim 4
Dependent Claim
85 words
The composition of claim 1, consisting essentially of 85.1 to 86.7 weight percent 1,1,1,2,3,4,4,5,5,5-decafluoropentane, 6.8 to 7.8 weight percent heptane, and 6.4 to 7.2 weight percent methanol; 90.2 to 90.8 weight percent 1,1,1,2,3,4,4,5,5,5-decafluoropentane, 5.2 to 5.6 weight percent heptane, and 4.0 to 4.2 weight percent ethanol; 93.2 to 94.0 weight percent 1,1,1,2,3,4,4,5,5,5-decafluoropentane, 5.3 to 5.9 weight percent heptane, and 0.6 to 1.0 weight percent n-propanol; and 91.4 to 92.2 weight percent 1,1,1,2,3,4,4,5,5,5-decafluoropentane, 5.0 to 5.4 weight percent heptane, and 2.7 to 3.3 weight percent isopropanol.
Claim 5
Dependent Claim
61 words
The composition of claim 1, consisting essentially of 85.9 weight percent 1,1,1,2,3,4,4,5,5,5-decafluoropentane, 7.3 weight percent heptane, and 6.8 weight percent methanol; 90.5 weight percent 1,1,1,2,3,4,4,5,5,5-decafluoropentane, 5.4 weight percent heptane, and 4.1 weight percent ethanol; 93.6 weight percent 1,1,1,2,3,4,4,5,5,5-decafluoropentane, 5.6 weight percent heptane, and 0.8 weight percent n-propanol; and 91.8 weight percent 1,1,1,2,3,4,4,5,5,5-decafluoropentane, 5.2 weight percent heptane, and 3.0 weight percent isopropanol.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1999-12-03 | 2000-06-03 | 2000-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-12-03 | 2004-06-03 | 2004-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-12-03 | 2008-06-03 | 2008-12-03 | $7700.00 | Window Closed / Lapsed |