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US4790955A
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Azeotrope-like compositions of trichlorotrifluoroethane, acetone, nitromethane and hexane
Assignee: Honeywell International Inc
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Filing: 1984-12-24
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Granted: 1988-12-13
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Expires: 2004-12-24
Abstract
Abstract Azeotrope-like compositions comprising of trichlorotrifluoroethane, acetone, nitromethane and hexane are stable and have utility as degreasing agents and as solvents in a variety of industrial cleaning applications.
Inventors
- 👤 Earl E. A. Lund
- 👤 David P. Wilson
- 👤 Rajat S. Basu
- 👤 Hang T. Pham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:00
CPC Classifications
C; C23; C23G; C23G5/00; C23G5/02; C23G5/028; C23G5/02809; C23G5/02812; C23G5/02816; C23G5/02819; C11; C11D; C11D7/00; C11D7/50; C11D7/5036; C11D7/5068; C11D7/509
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
8 words
Azeotrope-like compositions comprising trichlorotrifluoroethane, acetone, nitromethane, and hexane.
Claim 2
Dependent Claim
8 words
Azeotrope-like compositions comprising trichlorotrifluoroethane, acetone, nitromethane, and hexane.
Claim 3
Dependent Claim
11 words
Azeotrope-like compositions according to claim 1 wherein said trichlorotrifluoroethane is 1,1,2-trichloro-1,2,2-trifluoroethane.
Claim 4
Dependent Claim
11 words
Azeotrope-like compositions according to claim 2 wherein said hexane is n-hexane.
Claim 5
Dependent Claim
11 words
Azeotrope-like compositions according to claim 2 wherein said hexane is 2-methylpentane.
Claim 6
Dependent Claim
11 words
Azeotrope-like composition according to claim 2 wherein said hexane is 3-methylpentane.
Claim 7
Dependent Claim
11 words
Azeotrope-like composition according to claim 2 wherein said hexane is 2,2-dimethylbutane.
Claim 8
Dependent Claim
11 words
Azeotrope-like compositions according to claim 2 wherein said hexane is 2,3-dimethylbutane.
Claim 9
Dependent Claim
11 words
Azeotrope-like compositions according to claim 2 wherein said hexane is isohexane.
Claim 10
Dependent Claim
44 words
Azeotrope-like compositions according to claim 2 comprising from about 72.7 to about 87.6 weigh percent 1,1,2-trichloro-1,2,2-trifluoroethane, from about 10.0 to about 16.6 weight percent acetone, from about 0.05 to about 1.1 weight percent nitromethane and from about 1.0 to about 10.6 weight percent hexane.
Claim 11
Dependent Claim
45 words
Azeotrope-like compositions according to claim 2 comprising from about 77.9 to about 87.6 weight percent of 1,1,2-trichloro-1,2,2-trifluoroethane, from about 10.0 to about 14.2 weight percent acetone, from about 0.05 to about 0.9 weight percent nitromethane, and from about 1.0 to about 7.9 weight percent hexane.
Claim 12
Dependent Claim
48 words
Azeotrope-like compositions according to claim 2 comprising from about 81.3 to about 83.6 weight percent of 1,1,2-trichloro-1,2,2-trifluoroethane, from about 10.5 to about 13.2 weight percent of acetone, from about 0.05 to about 0.4 weight percent of nitromethane, and from about 1.5 to about 5.5 weight percent of hexane.
Claim 13
Dependent Claim
11 words
Azeotrope-like compositions according to claim 11 wherein said hexane is isohexane.
Claim 14
Dependent Claim
21 words
The method of cleaning a solid surface which comprises treating said surface with an azeotrope-like composition as defined in claim 1.
Claim 15
Dependent Claim
21 words
The method of cleaning a solid surface which comprises treating said surface with an azeotrope-like composition as defined in claim 2.
Claim 16
Dependent Claim
21 words
The method of cleaning a solid surface which comprises treating said surface with an azeotrope-like composition as defined in claim 8.
Claim 17
Dependent Claim
21 words
The method of cleaning a solid surface which comprises treating said surface with an azeotrope-like composition as defined in claim 10.
Claim 18
Dependent Claim
21 words
The method of cleaning a solid surface which comprises treating said surface with an azeotrope-like composition as defined in claim 11.
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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) | 1991-12-13 | 1992-06-13 | 1992-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-13 | 1996-06-13 | 1996-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-13 | 2000-06-13 | 2000-12-13 | $7700.00 | Window Closed / Lapsed |