Patent US3555557A successfully refreshed from Google Patents.
US3555557A
Expired / Lapsed
US
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Reflex thermomagnetic recording process
Assignee: EIDP Inc
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Filing: 1969-02-04
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Granted: 1971-01-12
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Expires: 1989-02-04
Abstract
Abstract A process for thermomagentic copying of documents using a semitransparent recording member containing a magnetic stratum which is permagnetized and placed in imaging relationship to the document. The assembly is exposed to light which passes through the recording member and is selectively reflected from the document so that the magnetic stratum is imagewise demagnetized.
Inventors
- 👤 George Raymond Nacci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:31
CPC Classifications
G; G03; G03G; G03G19/00; B; B41; B41M; B41M5/00; B41M5/26; G03G5/00; G03G5/16
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |