US2768356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical impedance transformer for use at very high frequencies
Assignee: Hartford National Bank and Trust Co
•
Filing: 1951-05-09
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Granted: 1956-10-23
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Expires: 1971-05-09
Abstract
No abstract record available.
Inventors
- 👤 Lindt Willem Jacobus Van De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:16
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/24; H01P5/00; H01P5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2428485A
Cited
US2593120A
Cited
US2564030A
Cited
US2508573A
Cited
US2486818A
Cited
US2568090A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |