US2453078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for wave length transformation of very short waves
Assignee: Hartford National Bank and Trust Co
•
Filing: 1943-03-17
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Granted: 1948-11-02
•
Expires: 1963-03-17
Abstract
No abstract record available.
Inventors
- 👤 Posthumus Klass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:43
CPC Classifications
H; H03; H03D; H03D7/00; H03D7/14; H03D7/1408
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1864591A
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US1916408A
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US2071630A
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NL58327C
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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) | 1951-11-02 | 1952-05-03 | 1952-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-02 | 1956-05-03 | 1956-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-02 | 1960-05-03 | 1960-11-02 | $7700.00 | Window Closed / Lapsed |