Patent DE258708C successfully refreshed from Google Patents.
Patent US4833236A successfully refreshed from Google Patents.
US4833236A
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US
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Erythromycin derivatives
Assignee: Taisho Pharmaceutical Co Ltd
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Filing: 1987-04-28
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Granted: 1989-05-23
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Expires: 2007-04-28
Abstract
Abstract Erythromycin derivatives represented by the general formula ##STR1## wherein R 1 is a hydrogen atom or a methyl group, R 2 is a hydrogen atom or a hydroxy group, R 3 is a hydrogen atom, a lower alkanoyl group, an alkoxycarbonyl group or an alkylsuccinyl group, and the salts thereof are disclosed. These compounds have antibacterial activity.
Inventors
- 👤 Shigeo Morimoto
- 👤 Yoko Takahashi
- 👤 Yoshiaki Watanabe
- 👤 Takashi Adachi
- 👤 Toshifumi Asaka
- 👤 Kaoru Sota
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:41
CPC Classifications
C; C07; C07H; C07H17/00; C07H17/04; C07H17/08; A; A61; A61P; A61P31/00; A61P31/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
50 words
Erythromycin derivatives represented by the general formula ##STR3## wherein R 1 is a hydrogen atom or a methyl group, R 2 is a hydrogen atom or a hydroxy group, R 3 is a hydrogen atom, a lower alkanoyl group, an alkoxycarbonyl group or an alkylsuccinyl group, and the salts thereof.
Claim 2
Dependent Claim
50 words
Erythromycin derivatives represented by the general formula ##STR3## wherein R 1 is a hydrogen atom or a methyl group, R 2 is a hydrogen atom or a hydroxy group, R 3 is a hydrogen atom, a lower alkanoyl group, an alkoxycarbonyl group or an alkylsuccinyl group, and the salts thereof.
Claim 3
Dependent Claim
2 words
4"-deoxy-6-O-methlerythromycin A.
Claim 4
Dependent Claim
2 words
4"-deoxy-6-O-methlerythromycin A.
Claim 5
Dependent Claim
2 words
2'-O-acetyl-4"-deoxy-6-O-methylerythromycin A.
Claim 6
Dependent Claim
2 words
2'-O-acetyl-4"-deoxy-6-O-methylerythromycin A.
Claim 7
Dependent Claim
2 words
2'-O-propionyl-4"-deoxy-6-O-methylerythromycin A.
Claim 8
Dependent Claim
2 words
2'-O-propionyl-4"-deoxy-6-O-methylerythromycin A.
Claim 9
Dependent Claim
2 words
2'-O-ethylsuccinyl-4"-deoxy-6-O-methylerythromycin A.
Claim 10
Dependent Claim
2 words
2'-O-ethylsuccinyl-4"-deoxy-6-O-methylerythromycin A.
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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 |