Patent US2736861A successfully refreshed from Google Patents.
US2736861A
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US
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Multirange direct current meter amplifier
Assignee: Individual
•
Filing: 1951-08-24
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Granted: 1956-02-28
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Expires: 1971-08-24
Abstract
No abstract record available.
Inventors
- 👤 Jr Philip A Duffy
- 👤 William J Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:19
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/0084
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE644464C
Cited
GB407458A
Cited
US2355068A
Cited
US2421578A
Cited
US2481500A
Cited
US2520766A
Cited
US2555306A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-27 | 1959-08-29 | 1960-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-27 | 1963-08-29 | 1964-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-27 | 1967-08-29 | 1968-02-28 | $7700.00 | Window Closed / Lapsed |