US2418947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nu4-(mercapto-acyl)-(p-amino-benzenesulfonamides) and method of preparing same
Assignee: ER Squibb and Sons LLC
•
Filing: 1943-05-17
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Granted: 1947-04-15
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Expires: 1963-05-17
Abstract
No abstract record available.
Inventors
- 👤 William A Lott
- 👤 Kathryn A Losee
- 👤 O'keeffe Andrew Ellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:28
CPC Classifications
C; C07; C07D; C07D498/00; C07D498/02; C07D498/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2270676A
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US2289029A
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US2260632A
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US2295867A
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US2300676A
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US2303698A
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US2324013A
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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) | 1950-04-14 | 1950-10-14 | 1951-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-04-14 | 1954-10-14 | 1955-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-04-14 | 1958-10-14 | 1959-04-15 | $7700.00 | Window Closed / Lapsed |