Patent US2452563A successfully refreshed from Google Patents.
US2452563A
Expired / Lapsed
US
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Circuits for repeating square shaped wave forms
Assignee: STC PLC
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Filing: 1945-01-11
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Granted: 1948-11-02
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Expires: 1965-01-11
Abstract
No abstract record available.
Inventors
- 👤 Glover William Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:12
CPC Classifications
H; H01; H01F; H01F19/00; H01F19/04; H01F19/08; H03; H03K; H03K3/00; H03K3/02; H03K3/04; H03K3/16; H03K5/00; H03K5/01; H03K5/02
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) | 1951-11-02 | 1952-05-03 | 1952-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-02 | 1956-05-03 | 1956-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-02 | 1960-05-03 | 1960-11-02 | $7700.00 | Window Closed / Lapsed |