US2844692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pile resistor
Assignee: Individual
•
Filing: 1953-05-19
•
Granted: 1958-07-22
•
Expires: 1973-05-19
Abstract
No abstract record available.
Inventors
- 👤 Louis H Berkelhamer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:32
CPC Classifications
H; H01; H01C; H01C3/00; H01C3/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2636963A
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US1230921A
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US1759184A
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FR657421A
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US1976514A
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US1987118A
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US2047796A
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US2332255A
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US2406079A
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US2407171A
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US2547405A
Cited
US2652522A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |