US2606943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic range-shifting voltmeter
Assignee: Eastern Ind Inc
•
Filing: 1947-02-06
•
Granted: 1952-08-12
•
Expires: 1967-02-06
Abstract
No abstract record available.
Inventors
- 👤 John L Barker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:28
CPC Classifications
G; G01; G01R; G01R15/00; G01R15/08; G01R15/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US536478A
Cited
US1784522A
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US1811319A
Cited
US1959592A
Cited
GB406360A
Cited
US2434297A
Cited
US2457214A
Cited
US2400190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-12 | 1956-02-11 | 1956-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-12 | 1960-02-11 | 1960-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-12 | 1964-02-11 | 1964-08-12 | $7700.00 | Window Closed / Lapsed |