US3623879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of forming a continuous tone photographic image
Assignee: WR Grace and Co
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Filing: 1968-10-11
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Granted: 1971-11-30
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Expires: 1988-10-11
Abstract
Abstract THIS INVENTION IS DIRECTED TOWARD FORMING A SILVERLESS CONTINUOUS TONE PHOTOGRAPHIC IMAGE HAVING A SCALE INDEX BETWEEN 0.5 AND 1.5 AND A GAMMA OF 0.5-1.5 (SEE "KODAK NOTES ON PRACTICAL DENSITOMETRY," PAMPHLET NO. E29, PP. 1-17, EASTMAN KODAK CO., ROCHESTER, N.Y. FOR DEFINITIONS), FROM A SUPPORTED PIGMENT OR DYE FILLED LIQUID PHOTOSENSITIVE COMPOSITION CONSISTING ESSENTIALLY OF A POLYENE CONTAINING AT LEAST TWO REACTIVE UNSATURATED CARBON TO CARBON BONDS PER MOLECULE, A PHOTOSENSITIZER AND A PIGMENT OR DY BY SELECTIVELY INSOLUBLZING PORTIONS OF THE COMPOSITION ON EXPOSURE TO ACTINIC RADIATION AND REMOVING THE UNEXPOSED LIQUID PORTION OF THE COMPOSITION FROM THE SUPPORT.
Inventors
- 👤 Arthur D Ketley
- 👤 Clifton L Kehr
- 👤 Jennie Lee Touchette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:48
CPC Classifications
G; G03; G03F; G03F1/00; G03F1/54; G03F1/56; G03F3/00; G03F3/10; G03F7/00; G03F7/004; G03F7/027; G03F7/0275; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/106; Y10S430/109; Y10S430/114; Y10S430/124; Y10S430/125; Y10S430/141
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |