US2797256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dichroic reflector optical system
Assignee: RCA Corp
•
Filing: 1951-09-25
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Granted: 1957-06-25
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Expires: 1971-09-25
Abstract
No abstract record available.
Inventors
- 👤 Frederick W Millspaugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:26
CPC Classifications
G; G03; G03B; G03B33/00; G03B33/10; G03B33/12; G01; G01J; G01J3/00; G01J3/28; H; H04; H04N; H04N23/00; H04N23/10; H04N23/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2403685A
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US2335180A
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US2379790A
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US2590906A
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US2560351A
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US2552070A
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US2589930A
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US2627547A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-24 | 1960-12-24 | 1961-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-24 | 1964-12-24 | 1965-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-24 | 1968-12-24 | 1969-06-25 | $7700.00 | Window Closed / Lapsed |