US2728050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for modulating ultra-short waves in a transmission line
Assignee: Hartford National Bank and Trust Co
•
Filing: 1951-05-09
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Granted: 1955-12-20
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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
2026-10-23 19:54
CPC Classifications
H; H03; H03C; H03C1/00; H03C1/52; H01; H01P; H01P5/00; H01P5/04; H03C7/00; H03C7/02; H03C7/022
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-19 | 1959-06-20 | 1959-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-19 | 1963-06-20 | 1963-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-19 | 1967-06-20 | 1967-12-20 | $7700.00 | Window Closed / Lapsed |