US4055507A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methylpentane/CClF2 CH2 Cl azeotropic mixtures
Assignee: EIDP Inc
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Filing: 1975-12-31
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Granted: 1977-10-25
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Expires: 1995-12-31
Abstract
Abstract Azeotropic mixtures of 3-methylpentane and 1,2-dichloro-1,1-difluoroethane useful in solvent cleaning applications.
Inventors
- 👤 Kavsy D. Dastur
- 👤 Robert A. Gorski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:21
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/50; C11D7/5036; C11D7/5068; C11D7/5072; C23; C23G; C23G5/00; C23G5/02; C23G5/028; C23G5/02809; C23G5/02825; C23G5/02829; C23G5/02835
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
22 words
An azeotropic composition consisting essentially of about from 4 to 10 weight percent 3-methylpentane and about from 96 to 90 weight percent
Claim 2
Dependent Claim
22 words
An azeotropic composition consisting essentially of about from 4 to 10 weight percent 3-methylpentane and about from 96 to 90 weight percent
Claim 3
Dependent Claim
24 words
An azeotropic composition of claim 1 consisting essentially of about from 6 to 8 weight percent 3-methylpentane and about from 94 to 92 weight
Claim 4
Dependent Claim
24 words
An azeotropic composition of claim 1 consisting essentially of about 7.4 weight percent 3-methylpentane and about 92.6 weight percent CClF 2 CH 2 Cl.
References Cited (Backward Citations)
US3042479A
Cited
US3201482A
Cited
US3249546A
Cited
US3431211A
Cited
US3349009A
Cited
US3819493A
Cited
US4024086A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-24 | 1981-04-25 | 1981-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-24 | 1985-04-25 | 1985-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-24 | 1989-04-25 | 1989-10-25 | $7700.00 | Window Closed / Lapsed |