US3715944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photocopying apparatus
Assignee: Canon Inc
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Filing: 1970-07-13
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Granted: 1973-02-13
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Expires: 1990-07-13
Abstract
Abstract D R A W I N G A PHOTOCOPYING APPARATUS IN WHICH THE OPTICAL IMAGE OF AN ORIGINAL IS FORMED WITH DIFFERENT DIMENSIONS ON ELECTROSTATICALLY CHARGED PAPER, FOIL OR LIKE MATERIAL. A MEANS FOR MEASURING THE LENGTH OF PHOTOSENSITIVE PAPER SUPPLIED FROM A SUPPLY ROLL OF PAPER IS PROVIDED, AND THIS MEASURING MEANS ON THE ONE HAND CONTROLS CUTTER MEANS THROUGH COMPARATOR MEANS FOR COMPARING ACTUAL MEASUREMENTS WITH STANDARD FORMATS AND ON THE OTHER HAND CONTROLS A DRIVE MECHANISM FOR DRAWING PAPER FROM SAID ROLL OF PAPER, WHEREBY COPIES OF DIFFERENT STANDARD FORMATS CAN BE OBTAINED WITHOUT CHANGING SHEETS OF COPYING PAPER.
Inventors
- 👤 W Knechtel
- 👤 D Schaffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:22
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/65; G03G15/6517; G03G15/6523; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/58; G03B27/587; G03B27/588; G03D; G03D15/00; G03D15/04; G03D15/043; G03D15/046; G03G15/6588; G03G15/6594; G03G2215/00; G03G2215/00362; G03G2215/00443; G03G2215/00518; Y; Y10; Y10T; Y10T83/00; Y10T83/081; Y10T83/088; Y10T83/444; Y10T83/4443; Y10T83/4455; Y10T83/4458; Y10T83/446; Y10T83/525; Y10T83/54
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |