Patent US3424525A successfully refreshed from Google Patents.
US3424525A
Expired / Lapsed
US
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Assignee: Xerox Corp
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Filing: 1966-05-20
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Granted: 1969-01-28
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Expires: 1986-05-20
Abstract
No abstract record available.
Inventors
- 👤 Harvey S Towers
- 👤 John E Blackert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:46
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/04; H; H10; H10N; H10N80/00; G03G15/041
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A SYSTEM FOR REPRODUCING MICRO-DATA FROM MICROFILM, SUCH SYSTEM HAVING A PHOTOSENSITIVE SURFACE ADAPTED FOR RECEIVING IMAGE RAYS OF THE MICRO-DATA AND A PROCESSING SYSTEM FOR REPRODUCING COPIES THEREFROM, COMPRISING: A FIRST PROJECTION SYSTEM, A LIGHT RECEIVING MEMBER HAVING A FRESNEL LENS IN THE IMAGE FOCAL PLANE OF SAID FIRST PROJECTION SYSTEM, A SECOND PROJECTION SYSTEM ADAPTED TO DIRECT THE IMAGE ON SAID LIGHT RECEIVING MEMBER SIMULTANEOUSLY, AS THE SAME IS PRODUCED ONTO A PHOTOSENSITIVE SURFACE AND THEREBY EFFECT THE REPRODUCTION OF THE COPIES OF THE ENLARGED MICRO-DATA IMAGES BY THE PROCESSING SYSTEM THEREOF, SAID LIGHT RECEIVING MEMBER BEING LOCATED AT THE OBJECT PLANE OF SAID SECOND PROJECTION SYSTEM, SAID FRESNEL LENS OF SAID LIGHT RECEIVING MEMBER HAVING A NUMBER OF GROOVES PER INCH AT LEAST EQUAL TO THE RESOLUTION CAPABILITIES OF THE PHOTOSENSITIVE SURFACE WHEREBY THE GROOVES OF SAID LENS ARE NOT IMAGED THEREON.
Claim 2
Independent Claim
145 words
A SYSTEM FOR REPRODUCING MICRO-DATA FROM MICROFILM, SUCH SYSTEM HAVING A PHOTOSENSITIVE SURFACE ADAPTED FOR RECEIVING IMAGE RAYS OF THE MICRO-DATA AND A PROCESSING SYSTEM FOR REPRODUCING COPIES THEREFROM, COMPRISING: A FIRST PROJECTION SYSTEM, A LIGHT RECEIVING MEMBER HAVING A FRESNEL LENS IN THE IMAGE FOCAL PLANE OF SAID FIRST PROJECTION SYSTEM, A SECOND PROJECTION SYSTEM ADAPTED TO DIRECT THE IMAGE ON SAID LIGHT RECEIVING MEMBER SIMULTANEOUSLY, AS THE SAME IS PRODUCED ONTO A PHOTOSENSITIVE SURFACE AND THEREBY EFFECT THE REPRODUCTION OF THE COPIES OF THE ENLARGED MICRO-DATA IMAGES BY THE PROCESSING SYSTEM THEREOF, SAID LIGHT RECEIVING MEMBER BEING LOCATED AT THE OBJECT PLANE OF SAID SECOND PROJECTION SYSTEM, SAID FRESNEL LENS OF SAID LIGHT RECEIVING MEMBER HAVING A NUMBER OF GROOVES PER INCH AT LEAST EQUAL TO THE RESOLUTION CAPABILITIES OF THE PHOTOSENSITIVE SURFACE WHEREBY THE GROOVES OF SAID LENS ARE NOT IMAGED THEREON.
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) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |