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Patent US2524494A successfully refreshed from Google Patents.
US2524494A
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Wave-signal responder system
Assignee: Ferranti International PLC
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Filing: 1947-07-22
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Granted: 1950-10-03
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Expires: 1967-07-22
Abstract
No abstract record available.
Inventors
- 👤 Wood Hubert
- 👤 Richard H Davies
- 👤 Whitehead James Rennie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:33
CPC Classifications
H; H04; H04W; H04W84/00; H04W84/02; B; B65; B65B; B65B43/00; B65B43/12; B65B43/14; B65B43/22; F; F16; F16D; F16D1/00; F16D1/06; G; G01; G01S; G01S13/00; G01S13/74; G01S13/76; G01S13/767; G01S13/78; G01S13/87; H03; H03D; H03D11/00; H03D11/02; H03F; H03F1/00; H03F1/52; H03F1/54; H03F1/542; B31; B31B; B31B2105/00; B31B2120/00; B31B2120/40; B31B2120/408
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-02 | 1954-04-03 | 1954-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-02 | 1958-04-03 | 1958-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-02 | 1962-04-03 | 1962-10-03 | $7700.00 | Window Closed / Lapsed |