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US2859409A
Expired / Lapsed
US
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Signal generator
Assignee: CLEVELAND PATENTS Inc
•
Filing: 1953-09-14
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Granted: 1958-11-04
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Expires: 1973-09-14
Abstract
No abstract record available.
Inventors
- 👤 Walter J Cerveny
- 👤 David S Wise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:41
CPC Classifications
H; H03; H03C; H03C3/00; H03C3/10; H03C3/12; H03C3/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2182377A
Cited
US2473556A
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US2563307A
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US2461307A
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US2526207A
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US2719223A
Cited
US2624853A
Cited
US2648823A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-03 | 1962-05-05 | 1962-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-03 | 1966-05-05 | 1966-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-03 | 1970-05-05 | 1970-11-04 | $7700.00 | Window Closed / Lapsed |