US2943258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for impedance measurements
Assignee: Sunoco Inc
•
Filing: 1954-08-12
•
Granted: 1960-06-28
•
Expires: 1974-08-12
Abstract
No abstract record available.
Inventors
- 👤 Shawhan Elbert Neil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:06
CPC Classifications
G; G01; G01R; G01R27/00; G01R27/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB569279A
Cited
US2525675A
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US2535027A
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US2508478A
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US2597088A
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US2651940A
Cited
US2677804A
Cited
US2769957A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |