US3671251A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sensitized pyrylium photobleachable dye in gelatin
Assignee: Eastman Kodak Co
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Filing: 1970-12-10
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Granted: 1972-06-20
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Expires: 1990-12-10
Abstract
Abstract A LIGHT SENSITIVE LAYER COMPRISING A GELATIN BINDER, A PHOTO-BLEACHABLE DYE SUCH AS A PYRYLIUM DYE, A PYRIDINUM DYE OR A CYANINE DYE, A SENSITIZER FOR THE DYE E.G., A THIOUREA SENSITIZER, AND IN A PREFERRED ASPECTS, A TANNING AGENT FOR THE GELATIN, WHEN COATED ON A SUITABLE SUPPORT, PROVIDES A NEGATIVE WORKING LITHOGRAPHIC PLATE WHICH, UPON EXPOSURE, BECOMES DIFFERENTIALLY INK AND WATER RECEPTIVE TO SUCH A DEGREE THAT IT MAY BE USED IN A PRINTING OPERATION WITHOUT ADDITIONAL PROCESSING.
Inventors
- 👤 Conrad G Houle
- 👤 Thomas J Masseth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:59
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/02; C; C07; C07D; C07D309/00; C07D309/34; G03F; G03F7/00; G03F7/004; G03F7/0045; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/127
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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |