US2824975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-optical system
Assignee: AT&T Inc
•
Filing: 1944-04-05
•
Granted: 1958-02-25
•
Expires: 1964-04-05
Abstract
No abstract record available.
Inventors
- 👤 Kenneth D Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:14
CPC Classifications
H; H01; H01J; H01J40/00; H01J40/02; H01J40/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1313187A
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US1415748A
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US1650092A
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US1889758A
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US1864670A
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US1832707A
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US2203882A
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US2219189A
Cited
US2360233A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-24 | 1961-08-26 | 1962-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-24 | 1965-08-26 | 1966-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-24 | 1969-08-26 | 1970-02-25 | $7700.00 | Window Closed / Lapsed |