Patent US2654840A successfully refreshed from Google Patents.
US2654840A
Expired / Lapsed
US
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Pulse generator
Assignee: Individual
•
Filing: 1950-09-01
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Granted: 1953-10-06
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Expires: 1970-09-01
Abstract
No abstract record available.
Inventors
- 👤 Clyde E Wiegand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:12
CPC Classifications
H; H03; H03K; H03K4/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2271876A
Cited
US2401404A
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US2428541A
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US2441387A
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US2455283A
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US2508879A
Cited
US2435938A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-05 | 1957-04-06 | 1957-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-05 | 1961-04-06 | 1961-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-05 | 1965-04-06 | 1965-10-06 | $7700.00 | Window Closed / Lapsed |