US2923819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystal gating circuit
Assignee: GTE Sylvania Inc
•
Filing: 1955-02-28
•
Granted: 1960-02-02
•
Expires: 1975-02-28
Abstract
No abstract record available.
Inventors
- 👤 William F Schreiber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:03
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB580575A
Cited
US2458599A
Cited
US2597796A
Cited
US2589465A
Cited
US2603746A
Cited
US2730632A
Cited
US2677759A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |