US2678424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual suspension oscillograph
Assignee: —
•
Filing: —
•
Granted: 1954-05-11
•
Expires: 1971-05-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:46
CPC Classifications
G; G01; G01R; G01R5/00; G01R5/02; G01R5/04; G01R5/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1930677A
Cited
US2161744A
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US2183934A
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US2410379A
Cited
US2469265A
Cited
US988084A
Cited
GB191117624A
Cited
US1859020A
Cited
US2154080A
Cited
US2294320A
Cited
US2501538A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-10 | 1957-11-09 | 1958-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-10 | 1961-11-09 | 1962-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-10 | 1965-11-09 | 1966-05-11 | $7700.00 | Window Closed / Lapsed |