Patent US4659505A successfully refreshed from Google Patents.
US4659505A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azeotropic like composition
Assignee: Daikin Industries Ltd
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Filing: 1986-02-19
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Granted: 1987-04-21
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Expires: 2006-02-19
Abstract
Abstract An azeotropic like composition comprising 95 to 93% by weight of Flon-112 and 5 to 7% by weight of isooctane. The composition has a lower freezing point than that of Flon-112 while maintaining excellent properties of Flon-112. The composition is useful as various solvents and dispersing media such as a cleaning solvent, an extraction solvent, a dispersing medium.
Inventors
- 👤 Naonori Enjo
- 👤 Yukio Omure
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:42
CPC Classifications
C; C23; C23G; C23G5/00; C23G5/02; C23G5/028; C23G5/02809; C23G5/02812; C23G5/02816; C23G5/02822; C11; C11D; C11D7/00; C11D7/50; C11D7/5036; C11D7/5068; C11D7/5072
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
An azeotropic like composition comprising 95 to 93% by weight of tetrachlorodifluoroethane and 5 to 7% by weight of isooctane.
Claim 2
Dependent Claim
20 words
An azeotropic like composition comprising 95 to 93% by weight of tetrachlorodifluoroethane and 5 to 7% by weight of isooctane.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-20 | 1990-10-20 | 1991-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-20 | 1994-10-20 | 1995-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-20 | 1998-10-20 | 1999-04-21 | $7700.00 | Window Closed / Lapsed |