Silver halide photographic element containing dyes for antihalation
Patent 5536626 Issued on July 16, 1996. Estimated Expiration Date: 
May 31, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 31, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesLight sensitive element having an antihalation layer Photographic infra-red sensitized material containing a speed enhancing agent Photographic element with near-infrared antihalation layer Patent #: 5330884 InventorsAssigneeApplicationNo. 445455 filed on 05/31/1995US Classes:430/522, Intercyclic methine or azomethine and cyclic ring containing430/512, Filters ultraviolet radiation430/561Azo dyeExaminersPrimary: Bowers, Charles L. Jr.Assistant: Young, Christopher G. Foreign Patent References
International ClassG03C 001/83AbstractA novel dye and photographic element comprising the dye are detailed. The dye is especially useful as an antihalation dye in a photographic element. A particularly preferred embodiment is provided in a photographic element comprising an absorbing amount of the dye: ##STR1## wherein X1, X2 independently represents --CR8 R9 --, --S--, --Se--, --NR10 --, --CH=CH-- or --O--;R1 and R2 independently represent alkyl of 1 to 10 carbons or substituted alkyl of 1 to 10 carbons;R3 represents a ring chosen from the set consisting of aromatic ring of 6 or 10 carbons, substituted aromatic ring of 6 or 10 carbons, a heterocyclic ring and a substituted heterocyclic ring;R4, R5, R6 and R7 independently represent hydrogen, alkyl of 1-10 carbons, substituted alkyl of 1-10 carbons;R8, R9 independently represent alkyl of 1-10 carbons, substituted alkyl of 1-10 carbons, aromatic ring of 6 or 10 carbons, substituted aromatic ring of 6 or 10 carbons;R10 represents an alkyl of 1-10 carbons, substituted alkyl of 1-10 carbons, aromatic ring of 6 or 10 carbons, substituted aromatic ring of 6 or 10 carbons;Q represents a counterion; andn is an integer chosen from 2 and 3.Other References
Field of SearchIntercyclic methine or azomethine and cyclic ring containingAntihalation or filter layer containing Filters ultraviolet radiation Organic dye or pigment containing Identified backing or protective layer containing Synthetic resin or cellulose derivative containing Silver compound sensitizer Dye containing Azo dye Silver compound sensitizer containing Chalcogen bonded directly to ring carbon of the five-membered hetero ring (e.g., indigoid dyes, etc.) |
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