US2786142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical tuning device
Assignee: Allen B du Mont Laboratories Inc
•
Filing: 1952-11-19
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Granted: 1957-03-19
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Expires: 1972-11-19
Abstract
No abstract record available.
Inventors
- 👤 Walter V Tyminski
- 👤 Albert E Hylas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:37
CPC Classifications
H; H03; H03J; H03J9/00; H03J9/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1958282A
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US2078909A
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US2474988A
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US2469941A
Cited
US2545681A
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US2611807A
Cited
US2672555A
Cited
US2695963A
Cited
US2698388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-18 | 1960-09-17 | 1961-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-18 | 1964-09-17 | 1965-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-18 | 1968-09-17 | 1969-03-19 | $7700.00 | Window Closed / Lapsed |