Patent US3272982A successfully refreshed from Google Patents.
US3372383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Information retrieval system
Assignee: General Dynamics Corp
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Filing: 1964-08-20
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Granted: 1968-03-05
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Expires: 1984-08-20
Abstract
No abstract record available.
Inventors
- 👤 Jr Jacob J Konen
- 👤 Max K Muir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:58
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
180 words
AN INFORMATION RETRIEVAL SYSTEM COMPRISING, A FILM BEARING A PLURALITY OF DISPLAY IMAGES TRANSPARENT TO LIGHT OF A FIRST COLOR AND A PLURALITY OF INDEXING IMAGES TRANSPARENT TO LIGHT OF A SECOND COLOR ASSOCIATED WITH SAID DISPLAY IMAGES AND OCCUPYING THE SAME AREA OF SAID FILM AS SAID DISPLAY IMAGES, A VIEWING AREA, MEANS FOR DRIVING SAID FILM TO PRESENT PARTICULAR DISPLAY IMAGES WITH THEIR ASSOCIATED INDEXING IMAGES TO SAID VIEWING AREA, FIRST FILTER MEANS POSITIONED ON SAID ONE SIDE OF SAID FILM FOR TRANSMITTING SAID DISPLAY IMAGES OF SAID FIRST COLOR BUT NOT SAID INDEXING IMAGES OF SAID SECOND COLOR, SECOND FILTER MEANS POSITIONED ON SAID ONE SIDE OF SAID FILM FOR TRANSMITTING PARTICULAR ONES OF SAID INDEXING IMAGES OF SAID SECOND COLOR BUT NOT SAID DISPLAY IMAGES OF SAID FIRST COLOR, AND A LIGHT SOURCE POSITIONED ON THE OTHER SIDE OF SAID FILM FOR CAUSING SAID DISPLAY IMAGES OF SAID FIRST COLOR TO BE DIRECTED AT SAID FIRST FILTER MEANS AND FOR CAUSING SAID INDEXING IMAGES OF SAID SECOND COLOR TO BE DIRECTED AT SAID SECOND FILTER MEANS.
Claim 2
Dependent Claim
180 words
AN INFORMATION RETRIEVAL SYSTEM COMPRISING, A FILM BEARING A PLURALITY OF DISPLAY IMAGES TRANSPARENT TO LIGHT OF A FIRST COLOR AND A PLURALITY OF INDEXING IMAGES TRANSPARENT TO LIGHT OF A SECOND COLOR ASSOCIATED WITH SAID DISPLAY IMAGES AND OCCUPYING THE SAME AREA OF SAID FILM AS SAID DISPLAY IMAGES, A VIEWING AREA, MEANS FOR DRIVING SAID FILM TO PRESENT PARTICULAR DISPLAY IMAGES WITH THEIR ASSOCIATED INDEXING IMAGES TO SAID VIEWING AREA, FIRST FILTER MEANS POSITIONED ON SAID ONE SIDE OF SAID FILM FOR TRANSMITTING SAID DISPLAY IMAGES OF SAID FIRST COLOR BUT NOT SAID INDEXING IMAGES OF SAID SECOND COLOR, SECOND FILTER MEANS POSITIONED ON SAID ONE SIDE OF SAID FILM FOR TRANSMITTING PARTICULAR ONES OF SAID INDEXING IMAGES OF SAID SECOND COLOR BUT NOT SAID DISPLAY IMAGES OF SAID FIRST COLOR, AND A LIGHT SOURCE POSITIONED ON THE OTHER SIDE OF SAID FILM FOR CAUSING SAID DISPLAY IMAGES OF SAID FIRST COLOR TO BE DIRECTED AT SAID FIRST FILTER MEANS AND FOR CAUSING SAID INDEXING IMAGES OF SAID SECOND COLOR TO BE DIRECTED AT SAID SECOND FILTER 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) | 1971-03-05 | 1971-09-04 | 1972-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-05 | 1975-09-04 | 1976-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-05 | 1979-09-04 | 1980-03-05 | $7700.00 | Window Closed / Lapsed |