US3411905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic masking process
Assignee: Eastman Kodak Co
•
Filing: 1965-06-14
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Granted: 1968-11-19
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Expires: 1985-06-14
Abstract
No abstract record available.
Inventors
- 👤 Robert A Mooney
- 👤 Clarence N Nelson
- 👤 Warren A Shelton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:46
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C1/00; G03C1/695; G03C5/00; G03C5/02; G03C7/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A PHOTOGRAPHIC PRINTING PROCESS FOR AUTOMATICALLY EXTENDING THE FINE DETAIL PRINT REPRODUCTION FROM A NEGATIVE SIMULANEOUSLY INTO BOTH THE UNDER- AND OVER-EXPOSED AREAS OF THE SAID NEGATIVE IN ADDITION TO LOWERING THE MACRO CONTRAST OF THE NEGATIVE WITHOUT LOWERING THE MICRO CNTRAST OF THE NEGATIVE, SAID PROCESS COMPRISING THE STEPS OF: (1) PRODUCING A TWO-COLORED UNSHARP MASK OF SAID NEGATIVE, SAID MASK AUTOMATICALLY FORMING IN AN IMAGEWISE MANNER A CONTINUOUSLY VARIABLE PAIR OF PRINTING FILTERS ONE OF SAID FILTERS BEING POSITIVE AND THE OTHER NEGATIVE, AND (2) EXPOSING A VARIABLE-CONTRAST REFLECTIN TYPE PHOTOGRAPHIC ELEMENT TO LIGHT THROUGHT EH SAID NEGATIVE AND THE SAID MASK IN UNSHARP PRINTING RELATIONSHIP, SAID ELEMENT HAVING A HIGH CONTRAST EMULSION THAT RESPONDS TO LIGHT TRANSMITTED BY ONLY ONE OF THE SAID VARIABLE PAIR OF PRINTING FILTERS AND A LOW CONTRAST EMULSION THAT RESPONDS ONLY TO LIGHT TRANSMITTED BY THE OTHER OF THE SAID VARIABLE PAIR OF PRINTING FILTERS.
Claim 2
Dependent Claim
153 words
A PHOTOGRAPHIC PRINTING PROCESS FOR AUTOMATICALLY EXTENDING THE FINE DETAIL PRINT REPRODUCTION FROM A NEGATIVE SIMULANEOUSLY INTO BOTH THE UNDER- AND OVER-EXPOSED AREAS OF THE SAID NEGATIVE IN ADDITION TO LOWERING THE MACRO CONTRAST OF THE NEGATIVE WITHOUT LOWERING THE MICRO CNTRAST OF THE NEGATIVE, SAID PROCESS COMPRISING THE STEPS OF: (1) PRODUCING A TWO-COLORED UNSHARP MASK OF SAID NEGATIVE, SAID MASK AUTOMATICALLY FORMING IN AN IMAGEWISE MANNER A CONTINUOUSLY VARIABLE PAIR OF PRINTING FILTERS ONE OF SAID FILTERS BEING POSITIVE AND THE OTHER NEGATIVE, AND (2) EXPOSING A VARIABLE-CONTRAST REFLECTIN TYPE PHOTOGRAPHIC ELEMENT TO LIGHT THROUGHT EH SAID NEGATIVE AND THE SAID MASK IN UNSHARP PRINTING RELATIONSHIP, SAID ELEMENT HAVING A HIGH CONTRAST EMULSION THAT RESPONDS TO LIGHT TRANSMITTED BY ONLY ONE OF THE SAID VARIABLE PAIR OF PRINTING FILTERS AND A LOW CONTRAST EMULSION THAT RESPONDS ONLY TO LIGHT TRANSMITTED BY THE OTHER OF THE SAID VARIABLE PAIR OF PRINTING FILTERS.
References Cited (Backward Citations)
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Cited
US2455849A
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US2737457A
Cited
US2848326A
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US3282693A
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US3062650A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-19 | 1972-05-20 | 1972-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-19 | 1976-05-20 | 1976-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-19 | 1980-05-20 | 1980-11-19 | $7700.00 | Window Closed / Lapsed |