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US3960746A
Expired / Lapsed
US
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Azeotrope-like compositions of methanol, nitromethane and trichlorotrifluoroethane
Assignee: EIDP Inc
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Filing: 1974-07-25
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Granted: 1976-06-01
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Expires: 1994-07-25
Abstract
Abstract Azeotrope-like compositions comprising from 5.0 to 6.3 weight percent of methanol, from 0.05 to 0.6 weight percent of nitromethane and from 93.1 to 94.95 weight percent of 1,1,2-trichloro-1,2,2-trifluoroethane, the compositions being useful for cleaning printed circuit boards.
Inventors
- 👤 Robert Alexander Gorski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:08
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; C11D7/5077; C11D7/5081
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
31 words
An azeotrope-like composition consisting essentially of from 5.0 to 6.3 weight percent of methanol, from 0.05 to 0.6 weight percent of nitromethane and from 93.1 to 94.95 weight percent of 1,1,2-trichloro-1,2,2-trifluoroethane.
Claim 2
Dependent Claim
31 words
An azeotrope-like composition consisting essentially of from 5.0 to 6.3 weight percent of methanol, from 0.05 to 0.6 weight percent of nitromethane and from 93.1 to 94.95 weight percent of 1,1,2-trichloro-1,2,2-trifluoroethane.
Claim 3
Dependent Claim
34 words
A composition according to claim 1 consisting essentially of from 5.5 to 5.9 weight percent of methanol, from 0.1 to 0.3 weight percent of nitromethane and from 93.8 to 94.4 weight percent of 1,1,2-trichloro-1,2,2-trifluoroethane.
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) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |