Patent US3575702A successfully refreshed from Google Patents.
US3575702A
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US
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Automatic printing method and apparatus
Assignee: Agfa Gevaert AG
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Filing: 1968-08-22
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Granted: 1971-04-20
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Expires: 1988-08-22
Abstract
Abstract REPRODUCTION OF IMAGES OF COLOR PHOTOGRAPHIC POSITIVE OR NEGATIVE ORIGINALS ONTO PRINTING PAPER IS REGULATED BY AN ADJUSTABLE EXPOSURE CONTROL WHICH RECEIVES IMPULSES FROM AN EVALUATING CIRCUIT. THE LATTER ADJUSTS THE EXPOSURE CONTROL AS A FUNCTION OF THE AVERAGE DENSITY OF THAT AREA OF THE ORIGINAL WHICH HAS A MAXIMUM AVERAGE CONTRAST. THE AVERAGE CONTRAST OF SEVERAL AREAS OF THE ORIGINAL CAN BE DETERMINED BY THE PROCESS OF ELIMINATION.
Inventors
- 👤 Hans-Peter Huber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:03
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/72; G03B27/73; G03B27/735; G03B27/80
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) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |