Patent US2499316A successfully refreshed from Google Patents.
US800873A
Expired / Lapsed
US
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Electrical measuring instrument.
Assignee: Leeds and Northrup Co
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Filing: 1904-11-19
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Granted: 1905-10-03
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Expires: 1924-11-19
Abstract
No abstract record available.
Inventors
- 👤 Edwin F Northrup
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:24
CPC Classifications
G; G01; G01R; G01R5/00; G01R5/02; G01R5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1908-10-02 | 1909-04-03 | 1909-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1912-10-02 | 1913-04-03 | 1913-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1916-10-02 | 1917-04-03 | 1917-10-03 | $7700.00 | Window Closed / Lapsed |