US2748202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amplifier with interference reducing circuit
Assignee: Hartford National Bank and Trust Co
•
Filing: 1953-01-13
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Granted: 1956-05-29
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Expires: 1973-01-13
Abstract
No abstract record available.
Inventors
- 👤 Mccallister Edward Samuel
- 👤 Woznica Kazimierz Wladyslaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:22
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/72; A61B5/7203; A61B5/24; A61B5/30; A61B5/307; A61B5/308; Y; Y10; Y10S; Y10S128/00; Y10S128/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2032253A
Cited
US2135037A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |