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Patent US4721720B1 successfully refreshed from Google Patents.
US4721720B1
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US4721720B1 - - Google Patents
Assignee: Beecham Group PLC
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Filing: 1986-03-12
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Granted: 1992-06-30
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Expires: 2006-03-12
Abstract
No abstract record available.
Inventors
- 👤 Wootton Gordon
- 👤 J Sanger Gareth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:27
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/33; A61K31/395; A61K31/435; A61K31/40; A61K31/403; A61K31/404; A61K31/405; A61K31/41; A61K31/415; A61K31/46; A61P; A61P1/00; A61P1/08; A61P11/00; A61P25/00; A61P25/20; A61P35/00
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) | 1995-06-30 | 1995-12-30 | 1996-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-30 | 1999-12-30 | 2000-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-30 | 2003-12-30 | 2004-06-30 | $7700.00 | Window Closed / Lapsed |