Patent US3597420A successfully refreshed from Google Patents.
US3597420A
Expired / Lapsed
US
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Tertiary-amino-lower-alkoxy-9-benzylidene-xanthenes and thioxanthenes
Assignee: STWB Inc
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Filing: 1969-02-17
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Granted: 1971-08-03
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Expires: 1989-02-17
Abstract
Abstract LOWER-TERTIARY-AMINO-LOWER-ALKOXY SUBSTITUTED XANTHENES AND THIOXANTHENES BEARING IN THE 9-POSITION A SECONDARY OR TERTIARY CARBINOL GROUP, A BENZYLIDENE GROUP OR A BENZYL GROUP ARE PREPARED FROM THE APPROPRIATE HYDROXY SUBSTITUTED 9-XANTHENONES OR 9-THIOXANTHENONES. THEY HAVE USEFUL PHARMACOLOGICAL PROPERTIES, E.G., AS ANTI-INFLAMMARTORY, ANTI-SECRETORY AND ANTI-ULCROGENIC AGENTS.
Inventors
- 👤 Sydney Archer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:55
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/78; C07D311/80; C07D311/82; C07D311/84; C07D311/86
Claims Analysis
Total Claims: 0
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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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |