US4986928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Binary azeotropic compositions of 1-chloro-1,2,2-trifluorocyclobutane and methanol
Assignee: EIDP Inc
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Filing: 1990-03-21
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Granted: 1991-01-22
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Expires: 2010-03-21
Abstract
Abstract Azeotropic mixtures of 1-chloro-1,2,2-trifluorocyclobutane and methanol are useful in solvent cleaning applications and as refrigerants, aerosol propellants and polymer blowing agents.
Inventors
- 👤 Abid N. Merchant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:46
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/30; C08; C08J; C08J9/00; C08J9/04; C08J9/12; C08J9/14; C08J9/149; C09K5/00; C09K5/02; C09K5/04; C09K5/041; C09K5/044; C11; C11D; C11D7/00; C11D7/50; C11D7/5036; C11D7/5068; C11D7/5077; C11D7/5081; C23; C23G; C23G5/00; C23G5/02; C23G5/028; C23G5/02809; C23G5/02825; C08J2207/00; C08J2207/04; C09K2205/00; C09K2205/10; C09K2205/102; C09K2205/32
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
39 words
An azeotropic composition consisting essentially of about 67-77 weight percent 1-chloro-1,2,2-trifluorocyclobutane and about 23-33 weight percent methanol, said composition having a boiling point of about 56.5 C. when the pressure on such composition is adjusted to substantially atmospheric pressure.
Claim 2
Dependent Claim
39 words
An azeotropic composition consisting essentially of about 67-77 weight percent 1-chloro-1,2,2-trifluorocyclobutane and about 23-33 weight percent methanol, said composition having a boiling point of about 56.5 C. when the pressure on such composition is adjusted to substantially atmospheric pressure.
Claim 3
Dependent Claim
21 words
The azeotropic composition of claim 1, wherein the composition is about 72.4 weight percent 1-chloro-1,2,2-trifluorocyclobutane and about 27.6 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 4, wherein the solid surface is a metal.
Claim 7
Dependent Claim
20 words
The azeotropic composition of claim 1, consisting essentially of about 70-75 weight percent 1-chloro-1,2,2-trifluorocyclobutane and about 25-30 weight percent methanol.
Claim 8
Dependent Claim
22 words
A process for producing refrigeration which comprises evaporating a mixture of claim 1 in the vicinity of a body to be cooled.
Claim 9
Dependent Claim
22 words
A process for producing heat which comprises condensing a composition of claim 1 in the vicinity of a body to be heated.
Claim 10
Dependent Claim
28 words
In a process for preparing a polymer foam comprising expanding a polymer with a blowing agent, the improvement wherein the blowing agent is a composition of claim 1.
Claim 11
Dependent Claim
22 words
In an aerosol composition comprising a propellant and an active agent, the improvement wherein the propellant is a composition of claim 1.
Claim 12
Dependent Claim
28 words
A process for preparing aerosol formulations comprising condensing an active ingredient in an aerosol container with an effective amount of the composition of claim 1 as a propellant.
Claim 13
Dependent Claim
10 words
The composition of claim 1, consisting of 1-chloro-1,2,2-trifluorocyclobutane and methanol.
References Cited (Backward Citations)
US2999815A
Cited
US2999817A
Cited
US3870797A
Cited
US3881949A
Cited
US3903009A
Cited
US4482465A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-01-21 | 1994-07-23 | 1995-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-21 | 1998-07-23 | 1999-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-21 | 2002-07-23 | 2003-01-22 | $7700.00 | Window Closed / Lapsed |