Patent US2494524A successfully refreshed from Google Patents.
US2494524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-(benzene sulfonamido)-tetra-hydrobenzothiazoles
Assignee: Sharp and Dohme Inc
•
Filing: 1943-01-12
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Granted: 1950-01-10
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Expires: 1963-01-12
Abstract
No abstract record available.
Inventors
- 👤 James M Sprague
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:02
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/28; C07D239/69; C07D277/00; C07D277/60; C07D277/62; C07D277/68; C07D277/82
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA:
References Cited (Backward Citations)
US1898431A
Cited
US2362087A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |