US2490717A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal mercaptides of 2-amino-benzenethiol
Assignee: F Hoffmann La Roche AG
•
Filing: 1946-02-12
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Granted: 1949-12-06
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Expires: 1966-02-12
Abstract
No abstract record available.
Inventors
- 👤 Steiger Norbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:22
CPC Classifications
C; C07; C07C; C07C323/00; C07C323/23; C07C323/31; C07C323/33; C07C323/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB157853A
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US1633626A
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DE526170C
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DE492886C
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FR657183A
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US1938585A
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US2130242A
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US2111151A
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GB465291A
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US2346102A
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US2370592A
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US2430287A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-05 | 1953-06-06 | 1953-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-05 | 1957-06-06 | 1957-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-05 | 1961-06-06 | 1961-12-06 | $7700.00 | Window Closed / Lapsed |