Patent US3752667A successfully refreshed from Google Patents.
US3752667A
Expired / Lapsed
US
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Method for directly recording light patterns
Assignee: TRIUMPH-ADLER AG A CORP OF GERMANY
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Filing: 1971-10-01
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Granted: 1973-08-14
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Expires: 1991-10-01
Abstract
Abstract A METHOD FOR DIRECTLY PRODUCING VISIBLE REPRODUCTIONS OF LIGHT PATTERNS IN HEAT SENSITIVE RECORD SHEET MATERIAL. THE RECORD SHEET MATERIAL IS PLACED CONTIGUOUS TO A PHOTOCONDUCTIVE PLATE AND IS DIELECTRICALLY HEATED TO RECORDING TEMPERATURE OPPOSITE AREAS OF THE PHOTOCONDUCTIVE PLATE EXPOSED TO LIGHT PATTERN INTNESITIES OF PREDETERMINED MAGNITUDE BY POTENTIAL GRADIENTS RESULTING FROM THE CHANNELLING OF HIGH FREQUENCY ELECTRIC FIELDS THROUGH THE RECORD SHEET MATERIAL BY THE LIGHT PRODUCED CONDUCTIVITY PATTERNS IN THE PHOTOCONDUCTIVE PLATE. POSITIVES OR NEGATIVES OF LIGHT PATTERNS MAY BE PRODUCED BY CONTROLLING LIGHT PATTERN INTENSITIES.
Inventors
- 👤 Onofrio A D
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:15
CPC Classifications
G; G03; G03G; G03G17/00
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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |