US2478191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction products of p-aminobenzenesulfonamides and vasoconstrictor amines
Assignee: Individual
•
Filing: 1942-06-02
•
Granted: 1949-08-09
•
Expires: 1962-06-02
Abstract
No abstract record available.
Inventors
- 👤 William F Hamilton
- 👤 Jr Melvin F George
- 👤 Simon Eli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:20
CPC Classifications
C; C07; C07D; C07D277/00; C07D277/02; C07D277/20; C07D277/32; C07D277/38; C07D277/50; C07D277/52
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USRE19569E
Cited
US2013524A
Cited
US2047144A
Cited
US2144395A
Cited
US2339788A
Cited
DE676436C
Cited
US2294937A
Cited
US2245539A
Cited
US2187467A
Cited
US2361624A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-08 | 1953-02-07 | 1953-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-08 | 1957-02-07 | 1957-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-08 | 1961-02-07 | 1961-08-09 | $7700.00 | Window Closed / Lapsed |