Patent US3387140A successfully refreshed from Google Patents.
US3387140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical signal correlator using rotary photochromic record means
Assignee: Unisys Corp
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Filing: 1965-06-21
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Granted: 1968-06-04
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Expires: 1985-06-21
Abstract
No abstract record available.
Inventors
- 👤 Roth Irving
- 👤 Edward W Stark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:15
CPC Classifications
G; G06; G06E; G06E3/00; G06E3/001
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
110 words
IN COMBINATION: A PAIR OF PHOTOCHROMIC DISKS; IMAGE ROTATING MEANS POSITIONED BETWEEN SAID PHOTOCHROMIC DISKS; MEANS TO PASS A BEAM OF RED LIGHT SERIALLY THROUGH SAID PHOTOCHROMIC DISKS AND SAID IMAGE ROTATING MEANS; MEANS TO COLLECT SAID READ BEAM; MEANS TO RECORD FIRST AND SECOND TRAINS OF INPUT SIGNALS IN ANNULAR PATHS ON SAID FIRST AND SECOND PHOTOCHROMIC DISKS RESPECTIVELY; MEANS TO ERASE SAID RECORDED SIGNALS; SAID IMAGE ROTATING MEANS BEING TIMED TO CAUSE SEVERAL COMPLETE ROTATIONS OF A PROJECTED IMAGE BEFORE A RECORDED SIGNAL IS ERASED; AND MEANS TO CORRELATE THE INSTANTANEOUS POSITION OF A PROJECTED IMAGE AND THE RESULTANT QUANTITY OF LIGHT BEING COLLECTED BY SAID COLLECTION MEANS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-04 | 1971-12-04 | 1972-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-04 | 1975-12-04 | 1976-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-04 | 1979-12-04 | 1980-06-04 | $7700.00 | Window Closed / Lapsed |