US3954773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
4-Desacetoxyvinblastine
Assignee: Eli Lilly and Co
•
Filing: 1974-11-21
•
Granted: 1976-05-04
•
Expires: 1994-11-21
Abstract
Abstract 4-Desacetoxyvinblastine, a novel indole-dihydroindole alkaloid obtained in small quantities from Vinca rosea, intermediate for the preparation of antimitotic compounds.
Inventors
- 👤 Norbert Neuss
- 👤 Albert J. Barnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:12
CPC Classifications
C; C07; C07D; C07D519/00; C07D519/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
23 words
A compound of the formula ##SPC2## wherein R and R' are OCH 3 and ##EQU2## respectively or are NH--NH 2 and H, respectively.
Claim 2
Dependent Claim
23 words
A compound of the formula ##SPC2## wherein R and R' are OCH 3 and ##EQU2## respectively or are NH--NH 2 and H, respectively.
Claim 3
Dependent Claim
8 words
The compound 4-desacetoxyvinblastine and pharmaceutically acceptable salts thereof.
Claim 4
Dependent Claim
8 words
The compound 4-desacetoxyvinblastine and pharmaceutically acceptable salts thereof.
Claim 5
Dependent Claim
11 words
A compound according to claim 1, said compound being 18'-descarbomethoxy-4-desacetoxyvinblastine hydrazide.
Claim 6
Dependent Claim
10 words
A sulfate salt of a compound according to claim 2.
References Cited (Backward Citations)
US3392173A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-04 | 1979-11-03 | 1980-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-04 | 1983-11-03 | 1984-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-04 | 1987-11-03 | 1988-05-04 | $7700.00 | Window Closed / Lapsed |