US2428011A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Receiver for time or duration modulated electrical pulses
Assignee: STC PLC
•
Filing: 1943-04-21
•
Granted: 1947-09-30
•
Expires: 1963-04-21
Abstract
No abstract record available.
Inventors
- 👤 Chatterjea Prafulla Kumar
- 👤 Scully Charles Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:30
CPC Classifications
H; H03; H03G; H03G11/00; H03G11/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2216582A
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US2061734A
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US2113214A
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US2175270A
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US2324275A
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US2265883A
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US2271203A
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US2277000A
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US2323880A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-29 | 1951-03-31 | 1951-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-29 | 1955-03-31 | 1955-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-29 | 1959-03-31 | 1959-09-30 | $7700.00 | Window Closed / Lapsed |