US2561772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for distinguishing between pulses having different characteristics
Assignee: RCA Corp
•
Filing: 1944-10-06
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Granted: 1951-07-24
•
Expires: 1964-10-06
Abstract
No abstract record available.
Inventors
- 👤 John B Atwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:07
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/10; H04B1/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1481284A
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US2251973A
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US2208349A
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US2266401A
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US2236015A
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GB528192A
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US2344745A
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US2355363A
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US2434937A
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US2434921A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |