US2721260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television input circuit
Assignee: Allen B du Mont Laboratories Inc
•
Filing: 1950-10-09
•
Granted: 1955-10-18
•
Expires: 1970-10-09
Abstract
No abstract record available.
Inventors
- 👤 Jr Fred W Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:49
CPC Classifications
H; H03; H03H; H03H2/00; H03H2/005; H03H2/008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1967570A
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US2268672A
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US2305743A
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US2312211A
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US2321291A
Cited
US2342638A
Cited
US2662216A
Cited
US2602864A
Cited
US2615983A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-17 | 1959-04-18 | 1959-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-17 | 1963-04-18 | 1963-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-17 | 1967-04-18 | 1967-10-18 | $7700.00 | Window Closed / Lapsed |