US4808331A
Expired / Lapsed
US
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Azeotrope or azeotrope-like composition of 1,1,2,-trichloro-1,2,2-trifluoroethane, trans-1,2-dichloroethylene and cyclopentane
Assignee: EIDP Inc
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Filing: 1988-05-24
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Granted: 1989-02-28
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Expires: 2008-05-24
Abstract
Abstract An Azeotrope or azeotrope-like composition of 1,1,2-trichloro-1,2,2-trifluoroethane (CFC-113) with trans-1,2-dichloroethylene and cyclopentane useful in solvent cleaning applications.
Inventors
- 👤 James G. Burt
- 👤 John P. Burns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:06
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/50; C11D7/5036; C11D7/5068; C11D7/5072
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
39 words
An azeotrope or azeotrope-like composition wherein the azeotrope or azeotrope-like components consist essentially of about 56 to about 66 weight percent 1,1,2-trichloro-1,2,2-triflouoroethane, about 32 to about 40 weight percent trans-1,2-dichloroethylene and about 1 to about 9.5 weight percent cyclopentane.
Claim 2
Dependent Claim
39 words
An azeotrope or azeotrope-like composition wherein the azeotrope or azeotrope-like components consist essentially of about 56 to about 66 weight percent 1,1,2-trichloro-1,2,2-triflouoroethane, about 32 to about 40 weight percent trans-1,2-dichloroethylene and about 1 to about 9.5 weight percent cyclopentane.
Claim 3
Dependent Claim
28 words
The azeotrope or azeotrope-like composition of claim 1 wherein the composition is about 60.7 weight percent 1,1,2-trichloro-1,2,2-trifluoroethane, about 36.2 weight percent trans-1,2-dichloroethylene and about 3.1 weight percent cyclopentane.
Claim 4
Dependent Claim
23 words
The azeotrope or azeotrope-like composition of claim 1 wherein the composition has a boiling point of about 43.9° C. at substantially atmospheric pressure.
Claim 5
Dependent Claim
21 words
A process for cleaning a solid surface which comprises treating said surface with the azeotrope or azeotrope-like composition of claim 1.
Claim 6
Dependent Claim
20 words
The process of claim 4 wherein the solid surface is a printed circuit board contaminated with flux and flux residues.
Claim 7
Dependent Claim
12 words
The process of claim 4 wherein the solid surface is a metal.
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) | 1992-02-28 | 1992-08-29 | 1993-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-28 | 1996-08-29 | 1997-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-28 | 2000-08-29 | 2001-02-28 | $7700.00 | Window Closed / Lapsed |