US2457176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wave generating system
Assignee: STC PLC
•
Filing: 1943-01-23
•
Granted: 1948-12-28
•
Expires: 1963-01-23
Abstract
No abstract record available.
Inventors
- 👤 Preisman Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:04
CPC Classifications
H; H03; H03K; H03K4/00; H03K4/06; H03K4/08; H03K4/86
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USRE21400E
Cited
GB426002A
Cited
GB488842A
Cited
US2231591A
Cited
US2259284A
Cited
US2288554A
Cited
US2292100A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-28 | 1952-06-28 | 1952-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-28 | 1956-06-28 | 1956-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-28 | 1960-06-28 | 1960-12-28 | $7700.00 | Window Closed / Lapsed |