US3691092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1,1,1,3,3,3-hexafluoro-2-propanol/c1 to c4 alkanol complexes
Assignee: EIDP Inc
•
Filing: 1970-10-29
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Granted: 1972-09-12
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Expires: 1990-10-29
Abstract
Abstract 1,1,1,3,3,3-Hexafluoro-2-propanol forms maximum boiling point complexes with primary, secondary and tertiary C1 to C4 alkanols that have improved selective solubilities for polymethylmethacrylates and other similar polymers.
Inventors
- 👤 Joseph Angelo Floria
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:37
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/05
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
27 words
The complex of claim 1 in which the alkanol is methanol which comprises about 56 mole percent of the azeotrope and the boiling point is about 82*C.
Claim 2
Dependent Claim
27 words
The complex of claim 1 in which the alkanol is ethanol which comprises about 61 mole percent of the azeotrope and the boiling point is about 91*C.
Claim 3
Dependent Claim
27 words
The complex of claim 1 in which the alkanol is 2-propanol which comprises about 62 mole percent Of the azeotrope and the boiling point is about 95*C.
Claim 4
Dependent Claim
27 words
The complex of claim 1 in which the alkanol is 2-methyl-2-propanol which comprises about 61 mole percent of the azeotrope and the boiling point is about 96*C.
References Cited (Backward Citations)
US2999816A
Cited
US3330776A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |