US2740830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television optical projection system
Assignee: Individual
•
Filing: 1951-09-04
•
Granted: 1956-04-03
•
Expires: 1971-09-04
Abstract
No abstract record available.
Inventors
- 👤 Gretener Edgar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:45
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/31; H04N9/3102; H04N9/3111; H04N9/3114; G; G03; G03B; G03B21/00; G03B33/00; H04N5/00; H04N5/74; H04N5/7416; H04N5/7425; H04N9/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2330172A
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US2423769A
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US2600590A
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US2577756A
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US2465652A
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US2549585A
Cited
US2589930A
Cited
CH268713A
Cited
US2568543A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-03 | 1959-10-03 | 1960-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-03 | 1963-10-03 | 1964-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-03 | 1967-10-03 | 1968-04-03 | $7700.00 | Window Closed / Lapsed |