US3715154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three-dimensional picture projection
Assignee: Agfa Gevaert AG
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Filing: 1971-03-09
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Granted: 1973-02-06
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Expires: 1991-03-09
Abstract
Abstract A PROJECTION SCREEN FOR USE IN THREE-DIMENSIONAL PROJECTION SYSTEMS WHEREIN TWO DISCRETE PROJECTORS PROJECT SPACED APART IMAGES OF A SCENE TO BE VIEWED HAS A FLAT ARRANGEMENT OF DISCRETE RECORDS OF FIRST AND SECOND VIEWING ZONES FROM WHICH THE SCREEN IS TO BE VIEWED BY THE RIGHT AND LEFT EYES OF PERSONS IN THE AUDIENCE. THE IMPINGEMENT OF IMAGES FROM THE FIRST AND SECOND PROJECTORS IS RESPECTIVELY CONFINED ONTO THE RECORDS OF THE FIRST AND SECOND VIEWING ZONES. THE ARRANGEMENT OF RECORDS IS A SET OF HOLOGRAMS OR AN INTEGRAM AND THE CONFINING MEANS COMPRISES POLARIZING AND/OR COLOR FILTERS, RASTERS OF LENTICULES, OR LASERS AND A SET OF ABJUSTABLE MIRRORS.
Inventors
- 👤 F Bestenreiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:17
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/60; G03B21/606
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) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |