Patent US2425641A successfully refreshed from Google Patents.
US2425641A
Expired / Lapsed
US
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Vacuum tube bridge voltmeter
Assignee: RAY L TRIPLETT
•
Filing: 1943-08-14
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Granted: 1947-08-12
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Expires: 1963-08-14
Abstract
No abstract record available.
Inventors
- 👤 Remde Jack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:22
CPC Classifications
G; G01; G01R; G01R17/00; G01R17/10; G01R17/16; G01R19/00; G01R19/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US879061A
Cited
US1232879A
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US1254620A
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US1611716A
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GB232593A
Cited
US1622786A
Cited
US1822996A
Cited
US2143219A
Cited
US2198226A
Cited
US2329073A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-11 | 1951-02-10 | 1951-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-11 | 1955-02-10 | 1955-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-11 | 1959-02-10 | 1959-08-12 | $7700.00 | Window Closed / Lapsed |