US3944554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
4-Desacetoxy-3-hydroxyvinblastine
Assignee: Eli Lilly and Co
•
Filing: 1975-01-09
•
Granted: 1976-03-16
•
Expires: 1995-01-09
Abstract
Abstract 4-Desacetoxy-3'-hydroxyvinblastine, a novel indoledihydroindole alkaloid obtained in small quantities from Vinca rosea, intermediate for the preparation of antimitotic compounds.
Inventors
- 👤 Susan S. Tafur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:09
CPC Classifications
C; C07; C07D; C07D519/00; C07D519/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
5 words
4-Desacetoxy-3'-hydroxyvinblastine having the formula ##SPC2##
Claim 2
Dependent Claim
5 words
4-Desacetoxy-3'-hydroxyvinblastine having the formula ##SPC2##
Claim 3
Dependent Claim
27 words
4-Desacetoxy-3'-hydroxyvinblastine having the following physical characteristics: proton nmr spectrum;peaks at δ 4.075, 5.85, 5.46-5.78 (broad multiplet) mass spectrum: ions at m/e 768, 411, 371, 224, 170, 102.
Claim 4
Dependent Claim
27 words
4-Desacetoxy-3'-hydroxyvinblastine having the following physical characteristics: proton nmr spectrum;peaks at δ 4.075, 5.85, 5.46-5.78 (broad multiplet) mass spectrum: ions at m/e 768, 411, 371, 224, 170, 102.
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) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |