US4833241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anthracycline compound
Assignee: Kirin Brewery Co Ltd
•
Filing: 1987-06-30
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Granted: 1989-05-23
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Expires: 2007-06-30
Abstract
Abstract Disclosed is an anthracycline compound of the following formula (I) or an acid addition salt thereof: ##STR1## These compounds are useful as intermediates in the synthesis of an anthracycline compound, M-R20X or M-R20X2, which has antitumor activity.
Inventors
- 👤 Hamao Umezawa
- 👤 Hiroyuki Kawai
- 👤 Shohachi Nakajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:34
CPC Classifications
C; C07; C07H; C07H15/00; C07H15/20; C07H15/24; C07H15/252; A; A61; A61P; A61P35/00; C12; C12P; C12P19/00; C12P19/44; C12P19/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
An anthracycline compound of the following formula or an acid addition salt thereof: ##STR5##
Claim 2
Dependent Claim
14 words
An anthracycline compound of the following formula or an acid addition salt thereof: ##STR5##
References Cited (Backward Citations)
US4301277A
Cited
US4585859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-22 | 1992-11-21 | 1993-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-22 | 1996-11-21 | 1997-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-22 | 2000-11-21 | 2001-05-23 | $7700.00 | Window Closed / Lapsed |