US3963696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
6,6A-AND 6,7-Anhydroerythromycin B and derivatives thereof
Assignee: Abbott Laboratories
•
Filing: 1975-02-21
•
Granted: 1976-06-15
•
Expires: 1995-02-21
Abstract
Abstract The present invention relates to the preparation of 6,6a-and 6,7-anhydroerythromycin B and derivatives thereof, which are useful as antibiotic.
Inventors
- 👤 Jerry Roy Martin
- 👤 John Soloman Tadanier
- 👤 Alma Whitman Goldstein
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
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
35 words
A compound having the formula ##SPC2## wherein R is hydrogen or ##EQU3## R 1 is = CH 2 or --CH 3 , and --- in position 6,7 indicates the presence of a possible double bond.
Claim 2
Dependent Claim
35 words
A compound having the formula ##SPC2## wherein R is hydrogen or ##EQU3## R 1 is = CH 2 or --CH 3 , and --- in position 6,7 indicates the presence of a possible double bond.
Claim 3
Dependent Claim
8 words
A compound according to claim 1, 6,7-anhydroerythromycin B.
Claim 4
Dependent Claim
8 words
A compound according to claim 1, 6,6a-anhydroerythromycin B.
Claim 5
Dependent Claim
8 words
A compound according to claim 1, 11-O-methylsulfinylmethyl-6,6a-anhydroerythromycin B.
Claim 6
Dependent Claim
8 words
A compound according to claim 1, 11-O-methylsulfinylmethyl-6,7-anhydroerythromycin B.
References Cited (Backward Citations)
US3681326A
Cited
US3816397A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-15 | 1979-12-15 | 1980-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-15 | 1983-12-15 | 1984-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-15 | 1987-12-15 | 1988-06-15 | $7700.00 | Window Closed / Lapsed |