Patent US3713861A successfully refreshed from Google Patents.
US3713861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inhibitor device
Assignee: Xerox Corp
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Filing: 1969-12-04
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Granted: 1973-01-30
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Expires: 1989-12-04
Abstract
Abstract A METHOD OF RENDERING A DOCUMENT COPY-PROOF BY OVERCOATING THE DOCUMENT WITH A FILM OF A SELECTED FLUORESCENT MATERIAL SO THAT LIGHT EMANATING FROM AN EXPOSURE SOURCE ONTO THE DOCUMENT FLUOORESCES IN THE IMAGES AREAS OF THE DOCUMENT AS WELL AS IN THE BACKGROUND AREAS. AS A RESULT, NO IMAGE IMPRESSION IS MADE ON THE PHOTOSENSITIVE ELEMENT OF THE COPYING DEVICE.
Inventors
- 👤 J Sharp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:03
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/08; B; B41; B41M; B41M7/00; B41M7/02; G03C11/00; G03C11/08; G03G; G03G21/00; G03G21/04; G03G21/043; G03G8/00; Y; Y10; Y10S; Y10S283/00; Y10S283/902; Y10S428/00; Y10S428/913; Y10S428/916
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |