US2623178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blocking oscillator
Assignee: Hartford National Bank and Trust Co
•
Filing: 1951-03-20
•
Granted: 1952-12-23
•
Expires: 1971-03-20
Abstract
No abstract record available.
Inventors
- 👤 Seur Christiaan Jacobus
- 👤 Kerker Dorus Gerardus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:54
CPC Classifications
H; H03; H03K; H03K4/00; H03K4/06; H03K4/08; H03K4/10; H03K4/12; H03K4/16; H03K3/00; H03K3/02; H03K3/04; H03K3/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2360697A
Cited
US2373165A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-23 | 1956-06-23 | 1956-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-23 | 1960-06-23 | 1960-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-23 | 1964-06-23 | 1964-12-23 | $7700.00 | Window Closed / Lapsed |