US2719191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit-arrangement of the kind comprising a plurality of amplifiers fed in parallel
Assignee: Hartford National Bank and Trust Co
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Filing: 1951-09-12
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Granted: 1955-09-27
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Expires: 1971-09-12
Abstract
No abstract record available.
Inventors
- 👤 Hermes Willem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:27
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/52; H03F1/54; H03F1/34; H03F1/36
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) | 1958-09-26 | 1959-03-28 | 1959-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-26 | 1963-03-28 | 1963-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-26 | 1967-03-28 | 1967-09-27 | $7700.00 | Window Closed / Lapsed |