US2462859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interference eliminating system
Assignee: STC PLC
•
Filing: 1944-03-18
•
Granted: 1949-03-01
•
Expires: 1964-03-18
Abstract
No abstract record available.
Inventors
- 👤 Donald D Grieg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:40
CPC Classifications
H; H03; H03G; H03G11/00; H03G11/02; G; G01; G01S; G01S1/00; G01S1/02; G01S7/00; G01S7/02; G01S7/28; G01S7/285; G01S7/292; G01S7/2921
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2313967A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-29 | 1952-08-30 | 1953-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-29 | 1956-08-30 | 1957-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-29 | 1960-08-30 | 1961-03-01 | $7700.00 | Window Closed / Lapsed |