US3567482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Latent image printing device
Assignee: International Business Machines Corp
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Filing: 1968-01-12
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Granted: 1971-03-02
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Expires: 1988-01-12
Abstract
Abstract A LATENT IMAGE PRINTING DEVICE COMPRISING A SUBSTRATE, A FIRST LAYER OF ABRASIVE MATERIAL, AND A SECOND LAYER OF NON-ABRASIVE MATERIAL PLACED AS A NEGATIVE FACSIMILE OF THE IMAGE TO BE PRINTED UPON SAID FIRST LAYER, SAID LAYERS MATCHED FOR SIMILARITY OF PROPERTIES OF COLOR, GLOSS AND FLUORESCENCE, TO RENDER THE IMAGE UNDETECTABLE UNDER NORMAL OR ULTRAVIOLET LIGHT. THE IMAGE IS DEVELOPED BY RUBBING, FOR EXAMPLE, A METAL OBJECT OVER THE SURFACE OF SAID SUBSTRATE, CAUSING ABRADING OF THE OBJECT IN THE ABRASIVE AREAS AND "PRINTING" OF SAID IMAGE.
Inventors
- 👤 Harry O George
- 👤 James F Martone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:57
CPC Classifications
B; B41; B41M; B41M3/00; B41M3/005; A; A63; A63F; A63F3/00; A63F3/06; A63F3/065; A63F3/0665; B44; B44F; B44F1/00; B44F1/08; B44F1/10
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |