Patent US4423218A successfully refreshed from Google Patents.
US4423218A
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Antibiotic neplanocin A
Assignee: Asahi Kasei Corp
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Filing: 1980-11-03
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Granted: 1983-12-27
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Expires: 2000-11-03
Abstract
Abstract Antibiotic neplanocin A of the formula <IMAGE> is produced by culturing Ampullariella sp. A 11079 FERM-P No. 4494 in a nutrient medium and then separating the neplanocin A thus produced from the culture medium.
Inventors
- 👤 Masaru Otani
- 👤 Satoshi Yaginuma
- 👤 Masatoshi Tsujino
- 👤 Naoki Muto
- 👤 Tetsu Saito
- 👤 Tadashiro Fujii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:40
CPC Classifications
C; C07; C07D; C07D473/00; C12; C12N; C12N1/00; C12N1/20; C12N1/205; C12P; C12P19/00; C12P19/26; C12P19/28; C12P19/38; C12P19/40; C12R; C12R2001/00; C12R2001/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
Antibiotic neplanocin A of the formula ##STR3## or a pharmaceutically acceptable salt thereof.
Claim 2
Dependent Claim
13 words
Antibiotic neplanocin A of the formula ##STR3## or a pharmaceutically acceptable salt thereof.
References Cited (Backward Citations)
US4138562A
Cited
US4321376A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-26 | 1987-06-27 | 1987-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-26 | 1991-06-27 | 1991-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-26 | 1995-06-27 | 1995-12-27 | $7700.00 | Window Closed / Lapsed |