Patent US2567928A successfully refreshed from Google Patents.
US2567928A
Expired / Lapsed
US
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Cold cathode timer
Assignee: Individual
•
Filing: 1949-08-27
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Granted: 1951-09-18
•
Expires: 1969-08-27
Abstract
No abstract record available.
Inventors
- 👤 Edward B Farmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:12
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/28; H03K17/288
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1880367A
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US1937869A
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US2372516A
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US2379262A
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US2360721A
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US2476963A
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US2453486A
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US2414443A
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US2480678A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-17 | 1955-03-19 | 1955-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-17 | 1959-03-19 | 1959-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-17 | 1963-03-19 | 1963-09-18 | $7700.00 | Window Closed / Lapsed |