US4925992A
Expired / Lapsed
US
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Perfluorinated 2-ISO propyl derivative compounds
Assignee: University of Pennsylvania
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Filing: 1989-02-21
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Granted: 1990-05-15
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Expires: 2009-02-21
Abstract
Abstract A novel composition of the formula: <IMAGE> wherein the carbon rings are fully fluorinated.
Inventors
- 👤 Frank K. Schweighardt
- 👤 Webb I. Bailey
- 👤 John T. Lileck
- 👤 John K. Graybill
- 👤 Eugene G. Lutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:46
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/38; B23K35/386; C; C07; C07C; C07C22/00; C07C23/00; C07C23/18; C07C23/20; C07C23/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
The perfluorinated compound having the formula: ##STR6## wherein the carbon rings are fully fluorinated.
Claim 2
Dependent Claim
14 words
The perfluorinated compound having the formula: ##STR6## wherein the carbon rings are fully fluorinated.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-14 | 1993-11-13 | 1994-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-14 | 1997-11-13 | 1998-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-14 | 2001-11-13 | 2002-05-15 | $7700.00 | Window Closed / Lapsed |