US4087429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
5' Acetoxy vinblastine 4' bis-sulfite
Assignee: Eli Lilly and Co
•
Filing: 1976-10-20
•
Granted: 1978-05-02
•
Expires: 1996-10-20
Abstract
Abstract Vincaleukoblastine (VLB, vinblastine) is reacted with thionyl chloride to form a bis-sulfite ester which is converted to various 5'-oxygenated derivatives.
Inventors
- 👤 Allen S. Katner
- 👤 Gerald E. Gutowski
- 👤 Jean C. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:21
CPC Classifications
C; C07; C07D; C07D519/00; C07D519/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
5'-Acetoxy VLB 4'-bis-sulfite ester of the formula ##STR3##
Claim 2
Dependent Claim
8 words
5'-Acetoxy VLB 4'-bis-sulfite ester of the formula ##STR3##
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-01 | 1981-10-31 | 1982-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-01 | 1985-10-31 | 1986-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-01 | 1989-10-31 | 1990-05-02 | $7700.00 | Window Closed / Lapsed |