US4970013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Binary azeotropic composition of 2,3-dichloro-1,1,1,3-3-pentafluoropropane and methanol
Assignee: CORIOLIS Corp A CORP OF
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Filing: 1989-12-11
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Granted: 1990-11-13
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Expires: 2009-12-11
Abstract
Abstract Azeotropic mixtures of 2,3-dichloro-1,1,1,3,3-pentafluoropropane and methanol, the azeotropic mixtures being useful in solvent cleaning applications. 2
Inventors
- 👤 Abid N. Merchant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:47
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/50; C11D7/5036; C11D7/5068; C11D7/5077; C11D7/5081
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
33 words
An azeotropic composition consisting essentially of from about 92-98 weight percent 2,3-dichloro-1,1,1,3,3-pentafluoropropane and about 2-8 weight percent methanol wherein the composition has a boiling point of about 45.2° C., at substantially atmospheric pressure.
Claim 2
Dependent Claim
33 words
An azeotropic composition consisting essentially of from about 92-98 weight percent 2,3-dichloro-1,1,1,3,3-pentafluoropropane and about 2-8 weight percent methanol wherein the composition has a boiling point of about 45.2° C., at substantially atmospheric pressure.
Claim 3
Dependent Claim
21 words
The azeotropic composition of claim 1, wherein the composition is about 95.5 weight percent 2,3-dichloro-1,1,1,3,3-pentafluoropropane and about 4.5 weight percent methanol.
Claim 4
Dependent Claim
19 words
A process for cleaning a solid surface which comprises treating said surface with the azeotropic composition of claim 1.
Claim 5
Dependent Claim
19 words
The process of claim 3, wherein the solid surface is a printed circuit board contaminated with flux and flux-residues.
Claim 6
Dependent Claim
12 words
The process of claim 3, wherein the solid surface is a metal.
Claim 7
Dependent Claim
16 words
A process for heating or cooling comprising the use of the azeotropic composition of claim 2.
Claim 8
Dependent Claim
18 words
A process for preparing a polymeric foam utilizing an effective amount of the azeotropic composition of claim 1.
Claim 9
Dependent Claim
30 words
A process of preparing aerosol formulation wherein the active ingredients are combined in an aerosol container with the azeotropic composition of claim 1, said azeotropic composition functioning as a propellant.
References Cited (Backward Citations)
US4465609A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-11-12 | 1994-05-14 | 1994-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-12 | 1998-05-14 | 1998-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-12 | 2002-05-14 | 2002-11-13 | $7700.00 | Window Closed / Lapsed |