Patent US2446674A successfully refreshed from Google Patents.
US2446674A
Expired / Lapsed
US
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Cathode-ray device mounting
Assignee: AT&T Inc
•
Filing: 1944-02-18
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Granted: 1948-08-10
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Expires: 1964-02-18
Abstract
No abstract record available.
Inventors
- 👤 Philip T Sproul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:26
CPC Classifications
G; G09; G09F; G09F9/00; G09F9/46; G01; G01R; G01R13/00; G01R13/20; G01R13/202
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2022175A
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GB472165A
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US2158925A
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GB459355A
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US2159328A
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US2251984A
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US2200039A
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US2234720A
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US2330604A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-10 | 1952-02-09 | 1952-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-10 | 1956-02-09 | 1956-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-10 | 1960-02-09 | 1960-08-10 | $7700.00 | Window Closed / Lapsed |