US2519443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixing or detector circuit arrangement
Assignee: Hartford National Bank and Trust Co
•
Filing: 1948-10-20
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Granted: 1950-08-22
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Expires: 1968-10-20
Abstract
No abstract record available.
Inventors
- 👤 Diemer Gesinus
- 👤 Knol Kornelis Swier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:56
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/43; G; G06; G06F; G06F3/00; G06F3/06; G06F3/08; H01; H01J; H01J21/00; H01J21/02; H01J21/06; H01J21/10; H01J21/14; H01J31/00; H01J31/02; H01J31/04; H01J2893/00; H01J2893/0029
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-21 | 1954-02-20 | 1954-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-21 | 1958-02-20 | 1958-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-21 | 1962-02-20 | 1962-08-22 | $7700.00 | Window Closed / Lapsed |