Patent US4777304A successfully refreshed from Google Patents.
US4777304A
Expired / Lapsed
US
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Perfluorinated butyl derivative compounds
Assignee: University of Pennsylvania
•
Filing: 1987-08-25
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Granted: 1988-10-11
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Expires: 2007-08-25
Abstract
Abstract Novel compositions of matter are disclosed having the formula: ##STR1## wherein the carbon rings are fully fluorinated to remove all hydrogens and olefinic character. The compositions have utility as heat transfer agents, hydraulic fluids, vapor phase soldering fluids, gas (O 2 , N 2 , CO 2 , H 2 , etc.) transport agents, such as in biological and medical fields, as well as utility as burn-in test fluid.
Inventors
- 👤 Frank K. Schweighardt
- 👤 Webb I. Bailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:52
CPC Classifications
C; C07; C07C; C07C23/00; C07C23/18; C07C23/20; C07C23/36; A; A61; A61P; A61P7/00; A61P7/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
14 words
The perfluorinated compounds of the formula: ##STR5## wherein the carbon rings are fully fluorinated.
Claim 2
Dependent Claim
14 words
The perfluorinated compounds of the formula: ##STR5## wherein the carbon rings are fully fluorinated.
Claim 3
Dependent Claim
10 words
The perfluorinated compounds of claim 1 having the formula: ##STR6##
Claim 4
Dependent Claim
10 words
The perfluorinated compounds of claim 1 having the formula: ##STR7##
Claim 5
Dependent Claim
10 words
The perfluorinated compound of claim 1 having the formula: ##STR8##
Claim 6
Dependent Claim
10 words
The perfluorinated compounds of claim 1 having the formula: ##STR9##
Claim 7
Dependent Claim
10 words
The perfluorinated compound of claim 1 having the formula: ##STR10##
Claim 8
Dependent Claim
10 words
The perfluorinated compounds of claim 1 having the formula: ##STR11##
Claim 9
Dependent Claim
10 words
The perfluorinated compound of claim 1 having the formula: ##STR12##
Claim 10
Dependent Claim
10 words
The perfluorinated compounds of claim 1 having the formula: ##STR13##
Claim 11
Dependent Claim
10 words
The perfluorinated compound of claim 1 having the formula: ##STR14##
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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) | 1991-10-11 | 1992-04-11 | 1992-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-11 | 1996-04-11 | 1996-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-11 | 2000-04-11 | 2000-10-11 | $7700.00 | Window Closed / Lapsed |