US2332906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparation of sulphonamide derivatives
Assignee: Individual
•
Filing: 1940-06-24
•
Granted: 1943-10-26
•
Expires: 1960-06-24
Abstract
No abstract record available.
Inventors
- 👤 Foldi Zolten
- 👤 Konig Rezso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:55
CPC Classifications
C; C07; C07D; C07D277/00; C07D277/60; C07D277/62; C07D277/68; C07D277/82; C07C; C07C311/00; C07C311/50; C07C311/52; C07C311/54
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) | 1946-10-25 | 1947-04-26 | 1947-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-10-25 | 1951-04-26 | 1951-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-10-25 | 1955-04-26 | 1955-10-26 | $7700.00 | Window Closed / Lapsed |