US2791504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photopolymerizable elements
Assignee: EIDP Inc
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Filing: 1955-10-20
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Granted: 1957-05-07
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Expires: 1975-10-20
Abstract
No abstract record available.
Inventors
- 👤 Jr Louis Plambeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:22
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/20; G03F7/2002; G03F7/2014; G03F7/004; G03F7/027; G03F7/028; G03F7/029; G03F7/201; Y; Y10; Y10S; Y10S430/00; Y10S430/156; Y10S430/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A PHOTOPOLYMERIZABLE PHOTOGRAPHICALLY SENSITIVE ELEMENT FOR THE PREPARING OF PRINTING RRELIEFS COMPRISING (1) A SOLID POLYMERIZABLE LAYER COMPRISING (A) AN ADDITION POLYMERIZABLE ETHYLENICALLY UNSATURATED COMPOUND CAPABLE OF FORMING A HIGH POLYMER BY PHOTOINITIATED POLYMERIZATION IN THE PRESENCE OF AN ADDITION POLYMERIZATION INITIATOR THEREFIR ACTIVATABLE BY ACTINIC LIGHT AND (B) AS THE SOLE TYPE OF ADDITION POLYMERIZATION INITIATOR PRESENT INTHE LAYER IN POLYMERIZATION-EFFECTIVE AMOUNTS ONE WHICH IS ACTIVATABLE BY ACTINIC LIGHT BUT IS THERMICALLY INACTIVE BELOW 85%C., SAID LAYER BEIN FROM 3 TO 250 MILS IN THICKNESS AND EXHIBITING AN OPTICAL DENSITY TO SAID ACTINIC LIGHT LESS THAN 5.0 AND LESS THAN 0.5 PER MIL; (2) A SUPPORT FOR SAID LAYER; AND (3) IN OPERATIVE ASSOCIATION WITH AND BENEATH SAID LAYER, ANTIHALATION MATERIAL SUFFICIENTLY ABSORPTIVE OF ACTINIC LIGHT SO THAT LESS THAN 35% OF ACTINIC LIGHT INCIDENT ON SAID MATERIAL IS REFLECTED INTO THE PHOTOPOLYMERIZABLE LAYER.
Claim 2
Dependent Claim
145 words
A PHOTOPOLYMERIZABLE PHOTOGRAPHICALLY SENSITIVE ELEMENT FOR THE PREPARING OF PRINTING RRELIEFS COMPRISING (1) A SOLID POLYMERIZABLE LAYER COMPRISING (A) AN ADDITION POLYMERIZABLE ETHYLENICALLY UNSATURATED COMPOUND CAPABLE OF FORMING A HIGH POLYMER BY PHOTOINITIATED POLYMERIZATION IN THE PRESENCE OF AN ADDITION POLYMERIZATION INITIATOR THEREFIR ACTIVATABLE BY ACTINIC LIGHT AND (B) AS THE SOLE TYPE OF ADDITION POLYMERIZATION INITIATOR PRESENT INTHE LAYER IN POLYMERIZATION-EFFECTIVE AMOUNTS ONE WHICH IS ACTIVATABLE BY ACTINIC LIGHT BUT IS THERMICALLY INACTIVE BELOW 85%C., SAID LAYER BEIN FROM 3 TO 250 MILS IN THICKNESS AND EXHIBITING AN OPTICAL DENSITY TO SAID ACTINIC LIGHT LESS THAN 5.0 AND LESS THAN 0.5 PER MIL; (2) A SUPPORT FOR SAID LAYER; AND (3) IN OPERATIVE ASSOCIATION WITH AND BENEATH SAID LAYER, ANTIHALATION MATERIAL SUFFICIENTLY ABSORPTIVE OF ACTINIC LIGHT SO THAT LESS THAN 35% OF ACTINIC LIGHT INCIDENT ON SAID MATERIAL IS REFLECTED INTO THE PHOTOPOLYMERIZABLE LAYER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-06 | 1960-11-05 | 1961-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-06 | 1964-11-05 | 1965-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-06 | 1968-11-05 | 1969-05-07 | $7700.00 | Window Closed / Lapsed |