US4781676B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
US4781676B1 - - Google Patents
Assignee: University of Pennsylvania
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Filing: 1987-02-20
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Granted: 1990-06-12
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Expires: 2007-02-20
Abstract
No abstract record available.
Inventors
- 👤 K Schweighardt Frank
- 👤 V Woo David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:27
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/21; A61K31/215; A61K31/25; A61K9/00; A61K9/0012; A61K9/0019; A61K9/0026; A61K31/02; A61K33/00; A61P; A61P35/00; A61P43/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-11 | 1993-12-11 | 1994-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-11 | 1997-12-11 | 1998-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-11 | 2001-12-11 | 2002-06-12 | $7700.00 | Window Closed / Lapsed |