Patent US2704339A successfully refreshed from Google Patents.
US2704339A
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US
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Capacity operated electronic control circuit
Assignee: TRONICS Inc
•
Filing: 1949-03-19
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Granted: 1955-03-15
•
Expires: 1969-03-19
Abstract
No abstract record available.
Inventors
- 👤 Jr George A Wescott
- 👤 Willard L Geiger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:08
CPC Classifications
F; F16; F16P; F16P3/00; F16P3/12; F16P3/14; F16P3/148
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1838084A
Cited
GB353627A
Cited
US2086913A
Cited
US2040425A
Cited
US2053445A
Cited
US2238040A
Cited
US2228163A
Cited
US2150440A
Cited
US2182336A
Cited
US2153986A
Cited
US2249488A
Cited
US2343987A
Cited
US2368953A
Cited
US2355395A
Cited
US2369243A
Cited
US2437661A
Cited
US2513342A
Cited
FR923060A
Cited
US2480678A
Cited
US2507565A
Cited
US2594424A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-03-14 | 1958-09-13 | 1959-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-14 | 1962-09-13 | 1963-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-14 | 1966-09-13 | 1967-03-15 | $7700.00 | Window Closed / Lapsed |