US4680386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
6-O-methylerythromycin a derivative
Assignee: Taisho Pharmaceutical Co Ltd
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Filing: 1985-10-21
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Granted: 1987-07-14
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Expires: 2005-10-21
Abstract
Abstract A novel 6-O-methylerythromycin A derivative represented by the formula <IMAGE> and the salts thereof are disclosed. These compounds are useful as intermediates for preparation of 6-O-methylerythromycin A and useful as antibiotics.
Inventors
- 👤 Shigeo Morimoto
- 👤 Takashi Adachi
- 👤 Toshifumi Asaka
- 👤 Yoshiaki Watanabe
- 👤 Kaoru Sota
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:57
CPC Classifications
C; C07; C07H; C07H17/00; C07H17/04; C07H17/08; A; A61; A61P; A61P31/00; A61P31/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
13 words
A 6-O-methylerythromycin A derivative represented by the formula ##STR4## and the salts thereof.
Claim 2
Dependent Claim
13 words
A 6-O-methylerythromycin A derivative represented by the formula ##STR4## and the salts thereof.
Claim 3
Dependent Claim
20 words
A 6-O-methylerythromycin A according to claim 1, wherein the salts are pharmacologically acceptable salts with organic acids or inorganic acids.
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) | 1990-07-13 | 1991-01-12 | 1991-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-13 | 1995-01-12 | 1995-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-13 | 1999-01-12 | 1999-07-14 | $7700.00 | Window Closed / Lapsed |