Patent EP0323728A2 successfully refreshed from Google Patents.
EP0323728A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Filter dyes for photographic elements
Assignee: Eastman Kodak Co
•
Filing: 1988-12-20
•
Granted: —
•
Expires: 2008-12-20
Abstract
Abstract Dyes according to the formula: R₁ and R₂ are each independently substituted or unsubstituted alkyl or substituted or unsubstituted aryl, or together represent the atoms necessary to complete a substituted or unsubstituted 5- or 6-membered ring, R₃ is substituted or unsubstituted alkyl or aryl, R₄ and R₅ each independently represents H, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, CO₂H, or NHSO₂R₆, with the proviso that at least one of R₄, R₅, or a substituent on an aryl R₃, on an aryl R₁ or R₂, or on an aryl ring formed by R₁ and R₂ is CO₂H or NHSO₂R₆, R₆ is substituted or unsubstituted alkyl or substituted or unsubstituted aryl, R₇ is substituted or unsubstituted alkyl, or together with R₈ forms a double bond, R₈ is H or together with R₇ forms a double bond, and n is 1 or 2.
Inventors
- 👤 Ronda Ellen C/O Eastman Kodak Company Factor
- 👤 Donald Richard C/O Eastman Kodak Company Diehl
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 19:41
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/83; G03C1/832; C; C09; C09B; C09B23/00; C09B23/0091
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
141 words
A dye having the formula; R₁ and R₂ are each independently substituted or unsubstituted alkyl or substituted or unsubstituted aryl, or together represent the atoms necessary to complete a substituted or unsubstituted 5- or 6-membered ring, R₃ is substituted or unsubstituted alkyl or aryl, R₄ and R₅ each independently represents H, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, CO₂H, or NHSO₂R₆, with the proviso that at least one of R₄, R₅, or a substituent on an aryl R₃, on an aryl R₁ or R₂, or on an aryl ring formed by R₁ and R₂ is CO₂H or NHSO₂R₆, R₆ is substituted or unsubstituted alkyl or substituted or unsubstituted aryl, R₇ is substituted or unsubstituted alkyl, or together with R₈ forms a double bond, R₈ is H or together with R₇ forms a double bond, and n is 1 or 2.
Claim 2
Dependent Claim
141 words
A dye having the formula; R₁ and R₂ are each independently substituted or unsubstituted alkyl or substituted or unsubstituted aryl, or together represent the atoms necessary to complete a substituted or unsubstituted 5- or 6-membered ring, R₃ is substituted or unsubstituted alkyl or aryl, R₄ and R₅ each independently represents H, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, CO₂H, or NHSO₂R₆, with the proviso that at least one of R₄, R₅, or a substituent on an aryl R₃, on an aryl R₁ or R₂, or on an aryl ring formed by R₁ and R₂ is CO₂H or NHSO₂R₆, R₆ is substituted or unsubstituted alkyl or substituted or unsubstituted aryl, R₇ is substituted or unsubstituted alkyl, or together with R₈ forms a double bond, R₈ is H or together with R₇ forms a double bond, and n is 1 or 2.
Claim 3
Dependent Claim
92 words
A dye according to Claim 1 wherein R₁ and R₂ are each independently substituted or unsubstituted alkyl of from 1 to 6 carbon atoms, or together form a phenyl ring, R₃ is substituted or unsubstituted alkyl of from 1 to 8 carbon atoms or substituted or unsubstituted aryl of from 6 to 14 carbon atoms, R₄ is H, CO₂H, or NHSO₂R₆, R₅ is H, CO₂H, or NHSO₂R₆, R₆ is substituted or unsubstituted alkyl of from 1 to 6 carbon atoms or substituted or unsubstituted aryl of from 6 to 14 carbon atoms.
Claim 4
Dependent Claim
43 words
A dye according to Claims 1-2 wherein R₁ and R₂ are each methyl or together with the carbon atoms to which they are attached, form a phenyl ring, R₄ is CO₂H, R₅ is H or CO₂H, and R₃ is methyl, ethyl, or benzyl.
Claim 5
Dependent Claim
70 words
A dye according to Claims 1-3 wherein at least one of R₄, R₅, or a substituent on an aryl R₃, on an aryl R₁ or R₂, or on an aryl ring formed by R₁ and R₂ is CO₂H, or at least two of R₄, R₅, or a substituent on an aryl R₃, on an aryl R₁ or R₂, or on an aryl ring formed by R₁ and R₂ are NHSO₂R₆.
Claim 6
Dependent Claim
26 words
A dye according to Claims 1-4 wherein R₇ is part of a double bond between the ring carbon atoms to which R₁ and R₂ are attached.
Claim 7
Dependent Claim
19 words
A dye according Claims 1-5 characterized in that the dye is in the form of a solid particle dispersion.
Claim 8
Dependent Claim
24 words
A dye according to Claim 6 in the form of a dispersion of particles having a mean diameter of from 0.01 to 10 µm.
Claim 9
Dependent Claim
24 words
A dye according to Claim 6 in the form of a dispersion of particles having a mean diameter of from 0.01 to 1.0 µm.
Claim 10
Dependent Claim
17 words
A dye according to Claims 6-7 wherein the dye particles are dispersed in a hydrophilic colloid vehicle.
Claim 11
Dependent Claim
30 words
A photographic element comprising a support having thereon a radiation-sensitive layer and a dye, located in the radiation-sensitive layer or in another layer of the element, according to Claims 1-8.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.