Patent US2873428A successfully refreshed from Google Patents.
US2873428A
Expired / Lapsed
US
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Expanded scale voltmeter
Assignee: Individual
•
Filing: 1953-08-11
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Granted: 1959-02-10
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Expires: 1973-08-11
Abstract
No abstract record available.
Inventors
- 👤 Bruno Anthony
- 👤 Galman Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:17
CPC Classifications
G; G01; G01R; G01R17/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR770781A
Cited
US2189660A
Cited
US2414318A
Cited
GB582307A
Cited
US2432199A
Cited
US2562912A
Cited
US2649715A
Cited
US2747161A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-09 | 1962-08-11 | 1963-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-09 | 1966-08-11 | 1967-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-09 | 1970-08-11 | 1971-02-10 | $7700.00 | Window Closed / Lapsed |