Patent US3142568A successfully refreshed from Google Patents.
US3142568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic emulsions, elements, and processes
Assignee: EIDP Inc
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Filing: 1961-03-13
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Granted: 1964-07-28
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Expires: 1981-03-13
Abstract
No abstract record available.
Inventors
- 👤 Nottorf Robert William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:57
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/043; G03C1/053; Y; Y10; Y10S; Y10S430/00; Y10S430/15; Y10S516/00; Y10S516/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A LIGHT-SENSITIVE LITHOGRAPHIC SILVER HALIDE EMULSION EXHIBITING IMPROVED HALFTONE DOT QUALITY HAVING A BINDING MATERIAL WHICH COMPRISES A MIXTURE OF GELATIN AND A POLYMETRIC AQUEOUS DISPERSION OF A POLYMERIZED VINYL COMPOUND AND AT LEAST ONE AMPHOTERIC DISPERSING AGENT OF THE FORMULA:
Claim 2
Dependent Claim
41 words
A LIGHT-SENSITIVE LITHOGRAPHIC SILVER HALIDE EMULSION EXHIBITING IMPROVED HALFTONE DOT QUALITY HAVING A BINDING MATERIAL WHICH COMPRISES A MIXTURE OF GELATIN AND A POLYMETRIC AQUEOUS DISPERSION OF A POLYMERIZED VINYL COMPOUND AND AT LEAST ONE AMPHOTERIC DISPERSING AGENT OF THE FORMULA:
References Cited (Backward Citations)
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US2489341A
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US2441389A
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US2607683A
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US2831766A
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US2779684A
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US2816920A
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US2956884A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-28 | 1968-01-27 | 1968-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-28 | 1972-01-27 | 1972-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-28 | 1976-01-27 | 1976-07-28 | $7700.00 | Window Closed / Lapsed |