US2451484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode-ray signal utilizing means
Assignee: AT&T Inc
•
Filing: 1943-10-05
•
Granted: 1948-10-19
•
Expires: 1963-10-05
Abstract
No abstract record available.
Inventors
- 👤 King E Gould
- 👤 Mertz Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:18
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1976400A
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US2179205A
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US2144337A
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US2171936A
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US2186268A
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US2251332A
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US2290651A
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US2361998A
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US2374666A
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US2416914A
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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) | 1951-10-19 | 1952-04-19 | 1952-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-19 | 1956-04-19 | 1956-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-19 | 1960-04-19 | 1960-10-19 | $7700.00 | Window Closed / Lapsed |