Patent US4366881A successfully refreshed from Google Patents.
US2753484A
Expired / Lapsed
US
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Signal indicating device
Assignee: TDK Micronas GmbH
•
Filing: 1952-07-29
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Granted: 1956-07-03
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Expires: 1972-07-29
Abstract
No abstract record available.
Inventors
- 👤 John H Bryant
- 👤 Albert G Peifer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:17
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/10; H01J31/12; H01J31/121
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1987136A
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GB380381A
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US2170944A
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US2301490A
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US2464076A
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US2424289A
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US2597360A
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US2514907A
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US2551024A
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US2472779A
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US2592228A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-03 | 1960-01-02 | 1960-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-03 | 1964-01-02 | 1964-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-03 | 1968-01-02 | 1968-07-03 | $7700.00 | Window Closed / Lapsed |