US2848684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage measuring instrument providing readings with an adjustable magnification range
Assignee: Institut de Recherches de la Siderurgie Francaise IRSID
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Filing: 1955-02-28
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Granted: 1958-08-19
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Expires: 1975-02-28
Abstract
No abstract record available.
Inventors
- 👤 Tuppin Claude
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:14
CPC Classifications
G; G01; G01R; G01R15/00; G01R15/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |