US4833236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Erythromycin derivatives
Assignee: Taisho Pharmaceutical Co Ltd
•
Filing: 1987-04-28
•
Granted: 1989-05-23
•
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 00:27
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.
References Cited (Backward Citations)
US4331803A
Cited
JPS5849396A
Cited
US4382085A
Cited
US4672109A
Cited
US4680386A
Cited
EP0184921A2
Cited
US4743593A
Cited
JPS61200998A
Cited
US4670549A
Cited
US4672056A
Cited
US4681872A
Cited
US4740502A
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 |