Patent US2877418A successfully refreshed from Google Patents.
US2877418A
Expired / Lapsed
US
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Vacuum tube voltmeter
Assignee: Individual
•
Filing: 1955-02-03
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Granted: 1959-03-10
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Expires: 1975-02-03
Abstract
No abstract record available.
Inventors
- 👤 Arthur J Eldridge
- 👤 Joseph G Nish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:54
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2316044A
Cited
US2472209A
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US2577499A
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US2697782A
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US2582676A
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US2613735A
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US2637786A
Cited
US2716162A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-09 | 1962-09-08 | 1963-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-09 | 1966-09-08 | 1967-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-09 | 1970-09-08 | 1971-03-10 | $7700.00 | Window Closed / Lapsed |