Patent US1770886A successfully refreshed from Google Patents.
US2410387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency wave signaling system
Assignee: GTE Sylvania Inc
•
Filing: 1942-02-14
•
Granted: 1946-10-29
•
Expires: 1962-02-14
Abstract
No abstract record available.
Inventors
- 👤 William P Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:37
CPC Classifications
H; H03; H03D; H03D7/00; H03D7/14; H03D7/1408
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) | 1949-10-28 | 1950-04-29 | 1950-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-10-28 | 1954-04-29 | 1954-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-10-28 | 1958-04-29 | 1958-10-29 | $7700.00 | Window Closed / Lapsed |