US2668945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical measuring instrument
Assignee: —
•
Filing: —
•
Granted: 1954-02-09
•
Expires: 1971-02-09
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:30
CPC Classifications
G; G01; G01R; G01R5/00; G01R5/14; G01R5/02; G01R5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US371720A
Cited
US1754085A
Cited
US2102409A
Cited
US2484567A
Cited
US1398595A
Cited
US1761917A
Cited
US2002445A
Cited
US2183685A
Cited
US2446431A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-08 | 1957-08-10 | 1958-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-08 | 1961-08-10 | 1962-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-08 | 1965-08-10 | 1966-02-09 | $7700.00 | Window Closed / Lapsed |