Patent US2106912A successfully refreshed from Google Patents.
US4474945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anthracycline antibiotics
Assignee: Mercian Corp
•
Filing: 1982-08-06
•
Granted: 1984-10-02
•
Expires: 2002-08-06
Abstract
Abstract New anthracycline compounds, 2-hydroxyaclacinomycin B having potent antitumor activity and lower toxicity, and a process for producing 2-hydroxyaclacinomycins A, B, and N by fermentation.
Inventors
- 👤 Akihiro Yoshimoto
- 👤 Hiroyasu Tobe
- 👤 Tomoyuki Ishikura
- 👤 Hamao Umezawa
- 👤 Tomio Takeuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:28
CPC Classifications
C; C07; C07H; C07H15/00; C07H15/20; C07H15/24; C07H15/252; C12; C12N; C12N1/00; C12N1/20; C12N1/205; C12P; C12P19/00; C12P19/44; C12P19/56; C12R; C12R2001/00; C12R2001/01; C12R2001/465
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
2-Hydroxyaclacinomycin B presented by the formula ##STR6## or a nontoxic acid addition salt thereof.
Claim 2
Dependent Claim
14 words
2-Hydroxyaclacinomycin B presented by the formula ##STR6## or a nontoxic acid addition salt thereof.
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) | 1987-10-02 | 1988-04-02 | 1988-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-02 | 1992-04-02 | 1992-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-02 | 1996-04-02 | 1996-10-02 | $7700.00 | Window Closed / Lapsed |