Patent US4904407A successfully refreshed from Google Patents.
US4904407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azeotrope-like compositions of 1,1,2-trichloro-1,2,2-trifluoroethane, methanol, nitromethane, 1,2-dichloroethylene and 1-chloropropane
Assignee: Honeywell International Inc
•
Filing: 1988-12-01
•
Granted: 1990-02-27
•
Expires: 2008-12-01
Abstract
Abstract Azeotrope-like compositions comprising 1,1,2-trichloro-1,2,2-trifluoroethane, methanol, nitromethane, 1,2-dichloroethylene and 1-chloropropane are stable and have utility as degreasing agents and as solvents in a variety of industrial cleaning applications including the defluxing of printed circuit boards.
Inventors
- 👤 Ellen L. Swan
- 👤 Rajat S. Basu
- 👤 David P. Wilson
- 👤 Earl A. E. Lund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:02
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/50; C11D7/5036; C11D7/5068; C11D7/5077; C11D7/5081
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
51 words
Azeotrope-like compositions consisting essentially of from about 51.9 to about 62.8 weight percent 1,1,2-trichloro-1,2,2-trifluoroethane, from about 5.7 to about 6.2 weight percent methanol, from about 0.05 to about 0.3 weight percent nitromethane, from about 16.3 to about 24.3 weight percent trans-1,2-dichloroethylene and from about 10.0 to about 19.5 weight percent 1-chloropropane.
Claim 2
Dependent Claim
51 words
Azeotrope-like compositions consisting essentially of from about 51.9 to about 62.8 weight percent 1,1,2-trichloro-1,2,2-trifluoroethane, from about 5.7 to about 6.2 weight percent methanol, from about 0.05 to about 0.3 weight percent nitromethane, from about 16.3 to about 24.3 weight percent trans-1,2-dichloroethylene and from about 10.0 to about 19.5 weight percent 1-chloropropane.
Claim 3
Dependent Claim
68 words
Azeotrope-like compositions according to claim 1 wherein said weight percent of 1,1,2-trichloro-1,2,2-trifluoroethane is from about 58.4 to about 62.8, said weight percent of methanol is from about 6.0 to about 6.2, said weight percent of nitromethane is from about 0.3 to about 0.05, said weight percent of trans-1,2-dichloroethylene is from about 17.3 to about 19.8 and said weight percent of 1-chloropropane is from about 10.5 to about 15.5.
Claim 4
Dependent Claim
62 words
Azeotrope-like compositions according to claim 1 wherein said weight percent of 1,1,2-trichloro-1,2,2-trifluoroethane is about 64.7, said weight percent of methanol is about 6.1, said weight percent of nitromethane is about 0.2, said weight percent of trans-1,2-dichloroethylene is about 17.9 and said weight percent of 1-chloropropane is about 13.6, which compositions have a boiling point of about 38° C. at 760 mm Hg.
Claim 5
Dependent Claim
49 words
Azeotrope-like compositions consisting essentially of from about 70.4 to about 72.0 weight percent 1,1,2-trichloro-1,2,2-trifluoroethane, from about 5.8 to about 6.3 weight percent methanol, from about 0.03 to about 0.5 weight percent nitromethane, from about 2.0 to about 0.4 weight percent cis-1,2-dichloroethylene and 20.0 to about 22.0 weight percent 1-chloropropane.
Claim 6
Dependent Claim
49 words
Azeotrope-like compositions consisting essentially of from about 70.4 to about 72.0 weight percent 1,1,2-trichloro-1,2,2-trifluoroethane, from about 5.8 to about 6.3 weight percent methanol, from about 0.03 to about 0.5 weight percent nitromethane, from about 2.0 to about 0.4 weight percent cis-1,2-dichloroethylene and 20.0 to about 22.0 weight percent 1-chloropropane.
Claim 7
Dependent Claim
68 words
Azeotrope-like compositions according to claim 4 wherein said weight percent of 1,1,2-trichloro-1,2,2-trifluoroethane is from about 70.4 to about 71.3, said weight percent of methanol is from about 6.1 to about 6.3, said weight percent of nitromethane is from about 0.03 to about 0.2, said weight percent of cis-1,2-dichloroethylene is from about 2.0 to about 0.8 and said weight percent of 1-chloropropane is from about 21.2 to about 21.6.
Claim 8
Dependent Claim
62 words
Azeotrope-like compositions according to claim 4 wherein said weight percent of 1,1,2-trichloro-1,2,2-trifluoroethane is about 71.3, said weight percent of methanol is about 6.3, said weight percent of nitromethane is about 0.2, said weight percent of cis-1,2-dichloroethylene is about 0.8 and said weight percent of 1-chloropropane is about 21.6, which compositions have a boiling point of about 38.5° C. at 760 mm Hg.
Claim 9
Dependent Claim
60 words
Azeotrope-like compositions consisting essentially of from about 51.9 to about 65.5 weight percent 1,1,2-trichloro-1,2,2-trifluoroethane, from about 5.7 to about 6.3 weight percent methanol, from about 0.02 to about 0.5 weight percent nitromethane, from about 16.3 to about 24.3 weight percent trans-1,2-dichloroethylene, from about 2.0 to about 0.4 weight percent cis-1,2-dichloroethylene and from about 10.0 to about 22.0 weight percent 1-chloropropane.
Claim 10
Dependent Claim
60 words
Azeotrope-like compositions consisting essentially of from about 51.9 to about 65.5 weight percent 1,1,2-trichloro-1,2,2-trifluoroethane, from about 5.7 to about 6.3 weight percent methanol, from about 0.02 to about 0.5 weight percent nitromethane, from about 16.3 to about 24.3 weight percent trans-1,2-dichloroethylene, from about 2.0 to about 0.4 weight percent cis-1,2-dichloroethylene and from about 10.0 to about 22.0 weight percent 1-chloropropane.
Claim 11
Dependent Claim
80 words
Azeotrope-like compositions according to claim 7 wherein said weight percent of 1,1,2-trichloro-1,2,2-trifluoroethane is from about 58.4 to about 65.5, said weight percent of methanol is from about 6.0 to about 6.3, said weight percent of nitromethane is from about 0.02 to about 0.2, said weight percent of trans-1,2-dichloroethylene is from about 16.0 to about 18.0, said weight percent of cis-1,2-dichloroethylene is from about 2.0 to about 0.5 and said weight percent of 1-chloropropane is from about 15.5 to about 10.5.
Claim 12
Dependent Claim
70 words
Azeotrope-like compositions according to claim 7 wherein said weight percent of 1,1,2-trichloro-1,2,2-trifluoroethane is about 65.5, said weight percent of methanol is about 6.1, said weight percent of nitromethane is about 0.2, said weight percent of trans-1,2-dichloroethylene is about 16.8, said weight percent of cis-1,2-dichloroethylene is about 0.7 and said weight percent of 1-chloropropane is about 10.8, which compositions have a boiling point of about 39.2° C. at 760 mm Hg.
Claim 13
Dependent Claim
34 words
Azeotrope-like compositions consisting essentially of 1,1,2-trichloro-1,2,2-trifluoroethane, methanol, nitromethane, at least about 16.3 weight percent trans-1,2-dichloroethylene and at least about 10.0 weight percent 1-chloropropane which boil at about 38° C.±1° C. at 760 mm Hg.
Claim 14
Dependent Claim
34 words
Azeotrope-like compositions consisting essentially of 1,1,2-trichloro-1,2,2-trifluoroethane, methanol, nitromethane, at least about 16.3 weight percent trans-1,2-dichloroethylene and at least about 10.0 weight percent 1-chloropropane which boil at about 38° C.±1° C. at 760 mm Hg.
Claim 15
Dependent Claim
34 words
Azeotrope-like compositions consisting essentially of 1,1,2-trichloro-1,2,2-trifluoroethane, methanol, nitromethane, at least about 0.4 weight percent cis-1,2-dichloroethylene and at least about 20.0 weight percent 1-chloropropane which boil at about 38.5° C.±1° C. at 760 mm Hg.
Claim 16
Dependent Claim
34 words
Azeotrope-like compositions consisting essentially of 1,1,2-trichloro-1,2,2-trifluoroethane, methanol, nitromethane, at least about 0.4 weight percent cis-1,2-dichloroethylene and at least about 20.0 weight percent 1-chloropropane which boil at about 38.5° C.±1° C. at 760 mm Hg.
Claim 17
Dependent Claim
45 words
Azeotrope-like compositions consisting essentially of 1,1,2-trichloro-1,2,2-trifluoroethane, methanol, nitromethane, at least about 10 weight percent 1-chloropropane and a mixture of at least about 16.3 weight percent trans-1,2-dichloroethylene and at least about 0.4 weight percent cis-1,2-dichloroethylene which boil at about 39.2° C.±1° C. at 760 mm Hg.
Claim 18
Dependent Claim
45 words
Azeotrope-like compositions consisting essentially of 1,1,2-trichloro-1,2,2-trifluoroethane, methanol, nitromethane, at least about 10 weight percent 1-chloropropane and a mixture of at least about 16.3 weight percent trans-1,2-dichloroethylene and at least about 0.4 weight percent cis-1,2-dichloroethylene which boil at about 39.2° C.±1° C. at 760 mm Hg.
Claim 19
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 20
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 4.
Claim 21
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 6.
Claim 22
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 23
Dependent Claim
25 words
The method of cleaning a solid surface according to claim 16 in which the solid surface is a printed circuit board contaminated with solder flux.
Claim 24
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.
Claim 25
Dependent Claim
25 words
The method of cleaning a solid surface according to claim 18 in which the solid surface is a printed circuit board contaminated with solder flux.
Claim 26
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 12.
Claim 27
Dependent Claim
25 words
The method of cleaning a solid surface according to claim 20 in which the solid surface is a printed circuit board contaminated with solder flux.
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) | 1993-02-26 | 1993-08-28 | 1994-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-26 | 1997-08-28 | 1998-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-26 | 2001-08-28 | 2002-02-27 | $7700.00 | Window Closed / Lapsed |