US3073847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
9-(3-amino-1-propynyl) derivatives of 9-xanthenols and 9-thioxanthenols and a process for their preparation
Assignee: F Hoffmann La Roche AG
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Filing: 1960-02-05
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Granted: 1963-01-15
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Expires: 1980-02-05
Abstract
No abstract record available.
Inventors
- 👤 Doebel Karl
- 👤 Rey-Bellet Gerald
- 👤 Schlapfer Reinhard
- 👤 Spiegelberg Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:17
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/72; C07D213/74; C07D311/00; C07D311/02; C07D311/78; C07D311/80; C07D311/82; C07D311/90; C07D335/00; C07D335/04; C07D335/10; C07D335/12; C07D335/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
6 words
A COMPOUND REPRESENTED BY THE FORMULA
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) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |