US4045366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azeotrope-like compositions of trichlorotrifluoroethane, nitromethane and acetone
Assignee: Honeywell International Inc
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Filing: 1976-11-16
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Granted: 1977-08-30
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Expires: 1996-11-16
Abstract
Abstract Azeotrope-like compositions consisting essentially of 1,1,2-trichloro-1,2,2-trifluoroethane, nitromethane and acetone have utility as degreasing agents and as solvents to remove rosin fluxes from printed circuit boards.
Inventors
- 👤 Francis J. Figiel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:10
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/50; C11D7/5036; C11D7/5068; C11D7/5095; C11D7/5077; C11D7/5081
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
19 words
Azeotrope-like compositions comprising about 90.25 weight percent 1,1,2-trichloro-1,2,2-trifluoroethane, about 0.33 weight percent nitromethane and about 9.42 weight percent acetone.
Claim 2
Dependent Claim
19 words
Azeotrope-like compositions comprising about 90.25 weight percent 1,1,2-trichloro-1,2,2-trifluoroethane, about 0.33 weight percent nitromethane and about 9.42 weight percent acetone.
Claim 3
Dependent Claim
12 words
Azeotrope-like compositions which consist essentially of the compositions defined in claim 1.
Claim 4
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 5
Dependent Claim
26 words
The method of cleaning a solid surface as described in claim 3 in which the solid surface is a printed circuit board contaminated with solder flux.
References Cited (Backward Citations)
US2999815A
Cited
US3573213A
Cited
US3789006A
Cited
US3728268A
Cited
US3903009A
Cited
US3960746A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-29 | 1981-02-28 | 1981-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-29 | 1985-02-28 | 1985-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-29 | 1989-02-28 | 1989-08-30 | $7700.00 | Window Closed / Lapsed |