Patent US5580997A successfully refreshed from Google Patents.
US5580997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Baccatin III derivatives
Assignee: Aventis Pharma SA
•
Filing: 1995-06-07
•
Granted: 1996-12-03
•
Expires: 2015-06-07
Abstract
Abstract New Baccatin III derivatives are disclosed for use in making taxoid compounds having formula (I) illustrated herein that exhibit antitumor activity.
Inventors
- 👤 Herv e Bouchard
- 👤 Jean-Dominique Bourzat
- 👤 Alain Commercon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:59
CPC Classifications
C; C07; C07D; C07D305/00; C07D305/14; A; A61; A61K; A61K31/00; A61K31/33; A61K31/335; A61P; A61P35/00; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/55
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
19 words
A compound of the formula (XXII) ##STR27## in which G 1 is a hydrogen atom or a hydroxy-protecting group.
Claim 2
Dependent Claim
19 words
A compound of the formula (XXII) ##STR27## in which G 1 is a hydrogen atom or a hydroxy-protecting group.
Claim 3
Dependent Claim
13 words
The compound of claim 1, wherein the hydroxy-protecting group is an acetyl radical.
Claim 4
Dependent Claim
16 words
The compound of claim 1, wherein the hydroxy-protecting group is a 2,2,2-trichloroethoxycarbonyl or a 2-(2-trichloromethylpropoxy)carbonyl radical.
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) | 1999-12-03 | 2000-06-03 | 2000-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-12-03 | 2004-06-03 | 2004-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-12-03 | 2008-06-03 | 2008-12-03 | $7700.00 | Window Closed / Lapsed |