US3588324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color image projectors
Assignee: US Philips Corp
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Filing: 1967-04-20
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Granted: 1971-06-28
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Expires: 1987-04-20
Abstract
Abstract A PROJECTION SYSTEM FOR DISPLAYING COLOR TELEVISION SIGNALS IN WHICH POLARIZED LIGHT IS FIRST DIRECTED TO TWO OR MORE OPTICAL RELAYS FOR ROTATION AS A FUNCTION OF LOW DEFINITION COLOR SIGNALS. THE CHROMINANCE RELAYS MAY BE EITHER IN SERIES OR PARALLEL WITH RESPECT TO THE LIGHT. THE RESULTANT LIGHT BEAM IS THEN ROTATED AS A FUNCTION OF A HIGH DEFINITION LUMINANCE SIGNAL, AND APPLIED TO A PROJECTION SYSTEM BY WAY OF AN ANALYZER ARRANGED TO PASS LIGHT THAT HAS BEEN ROTATED 90.*
Inventors
- 👤 Jerard Marie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:29
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/31; H04N9/3102; H04N9/3105; H04N5/00; H04N5/74
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |