US3674331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Space division multiplexed holographic apparatus
Assignee: Unisys Corp
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Filing: 1970-10-09
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Granted: 1972-07-04
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Expires: 1990-10-09
Abstract
Abstract HOLOGRAPHIC APPARATUS INCLUDING A PLURALITY OF SPATIALLY COMPLEMENTARY SAMPLING MASKS FOR SPACE DIVISION MULTIPLEXING RESPECTIVE OBJECT SIGNALS IN SUCH A WAY THAT EACH RECORDING IS DISTRIBUTED THROUGHOUT SUBSTANTIALLY THE FULL AREA OF THE HOLOGRAPHIC STORAGE MEDIUM. INDIVIDUAL MASKS ARE USED FOR SUCCESSIVELY RECORDING THE VARIOUS OBJECTS AND THE MASK CORRESPONDING TO A PARTICULAR RECORDING IS USED IN PLAYBACK APPARATUS FOR PRODUCING RESPECTIVE IMAGES OF SAID OBJECTS.
Inventors
- 👤 Henry John Caulfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:32
CPC Classifications
G; G03; G03H; G03H1/00; G03H1/26
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) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |