US3745008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic process
Assignee: Agfa Gevaert AG
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Filing: 1971-04-13
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Granted: 1973-07-10
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Expires: 1991-04-13
Abstract
Abstract NEGATIVE CONTINOUS TONE IMAGES ARE PRODUCED FROM BLACK-AND-WHITE OR COLORED ORIGINALS WHICH ORIGINALS ARE DIFFERING IN THEIR DENSITY RANGE WHEREBY THE EXPOSURE TIME IS DETERMINED ONLY FROM THE DENSITY OF THE LIGHT AREAS IN THE ORIGINALS AND WHEREIN THE PHOTOGRAPHIC COPYING MATERIAL FOR MAKING THE NEGATIVE CONTINUOUS-TONE IMAGE HAS A CERTAIN CHARACTERISTIC CURVE WHICH IS DEFINED BELOW.
Inventors
- 👤 E Hellmig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:10
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/02; G03F; G03F3/00; G03F3/10; G03F3/101
Claims Analysis
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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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |