US3965088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Naphthacene derivatives
Assignee: Rhone Poulenc SA
•
Filing: 1972-11-20
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Granted: 1976-06-22
•
Expires: 1992-11-20
Abstract
Abstract Naphthacene derivatives of the formula:
Inventors
- 👤 Georges Jolles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:27
CPC Classifications
C; C07; C07H; C07H15/00; C07H15/20; C07H15/24; C07H15/252
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
The naphthacene derivative which is 4-methoxy-5,12-dioxo-6,9,11-trihydroxy-7-(2,3,6-O-tridesocy-3-amino-1-L-lyxohexosyl)-9-(1-formylhydrazonoethyl)-5,7,8,9,10,12-hexahydronaphthacene, and non-toxic acid addition salts thereof.
Claim 2
Dependent Claim
12 words
The naphthacene derivative which is 4-methoxy-5,12-dioxo-6,9,11-trihydroxy-7-(2,3,6-O-tridesocy-3-amino-1-L-lyxohexosyl)-9-(1-formylhydrazonoethyl)-5,7,8,9,10,12-hexahydronaphthacene, and non-toxic acid addition salts thereof.
References Cited (Backward Citations)
US3590028A
Cited
US3686163A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-22 | 1979-12-22 | 1980-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-22 | 1983-12-22 | 1984-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-22 | 1987-12-22 | 1988-06-22 | $7700.00 | Window Closed / Lapsed |