Patent US4910138A successfully refreshed from Google Patents.
US4910138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of an organ culture of Catharanthus roseus to produce vincristine and vinblastine
Assignee: Individual
•
Filing: 1986-05-01
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Granted: 1990-03-20
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Expires: 2006-05-01
Abstract
Abstract A method of preparing an organ culture from branched tissue of a Catharanthus roseus seedling is disclosed. The indole alkaloids vincristine and vinblastine can be recovered from the organ culture tissue via extraction.
Inventors
- 👤 Yoshiharu Miura
- 👤 Kazumasa Hirata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:21
CPC Classifications
C; C12; C12N; C12N5/00; C12N5/04; C07; C07D; C07D519/00; C07D519/04; Y; Y10; Y10S; Y10S47/00; Y10S47/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A process for the preparation of vinblastine and vincristine which comprises cultivating a seedling of Catharanthus roseus on a culture medium containing a phytohormone, transferring branched tissue projected from a dicotyledonous portion of said seedling to said culture medium, cultivating said branched tissue, and recovering said vinblastine and vincristine from the resultant culture by extraction.
Claim 2
Dependent Claim
55 words
A process for the preparation of vinblastine and vincristine which comprises cultivating a seedling of Catharanthus roseus on a culture medium containing a phytohormone, transferring branched tissue projected from a dicotyledonous portion of said seedling to said culture medium, cultivating said branched tissue, and recovering said vinblastine and vincristine from the resultant culture by extraction.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-03-19 | 1993-09-18 | 1994-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-19 | 1997-09-18 | 1998-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-19 | 2001-09-18 | 2002-03-20 | $7700.00 | Window Closed / Lapsed |