US3543290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical scanner and slit exposure device for reproduction apparatus
Assignee: Ricoh Co Ltd
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Filing: 1968-09-05
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Granted: 1970-11-24
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Expires: 1988-09-05
Abstract
Abstract An optical scanning and reflecting system is disclosed for use in a document copying apparatus in which photosensitive paper is exposed by the image of an original document. Light from the original document is reflected by three moving mirrors through a fixed lens and is projected through a slit upon photosensitive paper which is moved in coordination with the movement of the three reflecting mirrors. Two mirrors move in a plane parallel to the original document and the third mirror moves perpendicular thereto.
Inventors
- 👤 Yutaka Koizumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:22
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/28; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/522; G03B27/525; G03B27/526
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2859673A
Cited
US3431053A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-23 | 1974-05-25 | 1974-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-23 | 1978-05-25 | 1978-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-23 | 1982-05-25 | 1982-11-24 | $7700.00 | Window Closed / Lapsed |