US2790035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple band-pass amplifier
Assignee: Allen B du Mont Laboratories Inc
•
Filing: 1953-01-05
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Granted: 1957-04-23
•
Expires: 1973-01-05
Abstract
No abstract record available.
Inventors
- 👤 Albert E Hylas
- 👤 Walter V Tyminski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:13
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/42; H03F1/48; H03F1/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1557860A
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US1438828A
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US1568142A
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US1708950A
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US1938620A
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US2429652A
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US2370399A
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US2422087A
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US2544508A
Cited
US2710314A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-22 | 1960-10-22 | 1961-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-22 | 1964-10-22 | 1965-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-22 | 1968-10-22 | 1969-04-23 | $7700.00 | Window Closed / Lapsed |