US2372193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Producing and transmitting electromagnetic waves
Assignee: AT&T Inc
•
Filing: 1940-06-05
•
Granted: 1945-03-27
•
Expires: 1960-06-05
Abstract
No abstract record available.
Inventors
- 👤 James B Fisk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:42
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/02; H01J25/10; H01J25/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1948-03-26 | 1948-09-25 | 1949-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-03-26 | 1952-09-25 | 1953-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-03-26 | 1956-09-25 | 1957-03-27 | $7700.00 | Window Closed / Lapsed |