US2591982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Superheterodyne receiver for very short waves
Assignee: Hartford National Bank and Trust Co
•
Filing: 1946-07-20
•
Granted: 1952-04-08
•
Expires: 1966-07-20
Abstract
No abstract record available.
Inventors
- 👤 Adelbert Van Weel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:26
CPC Classifications
H; H03; H03D; H03D7/00; H03D7/14; H03D7/1408; H03F; H03F3/00; H03F3/54; H03H; H03H2/00; H03H2/005; H03H2/008; H04; H04B; H04B1/00; H04B1/06; H04B1/10; H04B1/12; H04B15/00; H04B15/02; H04B15/04; H04B15/06; H04L; H04L12/00; H04L12/02; H04L12/06; H04L15/00; H04L15/04; H04L15/22
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) | 1955-04-08 | 1955-10-08 | 1956-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-08 | 1959-10-08 | 1960-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-08 | 1963-10-08 | 1964-04-08 | $7700.00 | Window Closed / Lapsed |