Patent US2844792A successfully refreshed from Google Patents.
US2844792A
Expired / Lapsed
US
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High frequency electrical meter cartridge
Assignee: Bird Electronic Corp
•
Filing: 1952-11-26
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Granted: 1958-07-22
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Expires: 1972-11-26
Abstract
No abstract record available.
Inventors
- 👤 James R Bird
- 👤 Henry J Calderhead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:21
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/24; H01P1/26; H01P1/266; G; G01; G01R; G01R1/00; G01R1/02; G01R1/06; G01R1/067; G01R1/06772
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2106713A
Cited
US2498335A
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US2480682A
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US2642494A
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US2555151A
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US2624780A
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 |