GB1186720A - Photographic Emulsions - Google Patents

Photographic Emulsions

Info

Publication number
GB1186720A
GB1186720A GB20914/67A GB2091467A GB1186720A GB 1186720 A GB1186720 A GB 1186720A GB 20914/67 A GB20914/67 A GB 20914/67A GB 2091467 A GB2091467 A GB 2091467A GB 1186720 A GB1186720 A GB 1186720A
Authority
GB
United Kingdom
Prior art keywords
alkyl
aryl
cyanine dyes
dyes
atoms
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB20914/67A
Inventor
John David Mee
Donald Warren Heseltine
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of GB1186720A publication Critical patent/GB1186720A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C1/00—Photosensitive materials
    • G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
    • G03C1/825—Photosensitive materials characterised by the base or auxiliary layers characterised by antireflection means or visible-light filtering means, e.g. antihalation
    • G03C1/83—Organic dyestuffs therefor
    • G03C1/832—Methine or polymethine dyes
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D209/00—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
    • C07D209/56—Ring systems containing three or more rings
    • C07D209/58—[b]- or [c]-condensed
    • C07D209/60—Naphtho [b] pyrroles; Hydrogenated naphtho [b] pyrroles
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D241/00—Heterocyclic compounds containing 1,4-diazine or hydrogenated 1,4-diazine rings
    • C07D241/36—Heterocyclic compounds containing 1,4-diazine or hydrogenated 1,4-diazine rings condensed with carbocyclic rings or ring systems
    • C07D241/38—Heterocyclic compounds containing 1,4-diazine or hydrogenated 1,4-diazine rings condensed with carbocyclic rings or ring systems with only hydrogen or carbon atoms directly attached to the ring nitrogen atoms
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D241/00—Heterocyclic compounds containing 1,4-diazine or hydrogenated 1,4-diazine rings
    • C07D241/36—Heterocyclic compounds containing 1,4-diazine or hydrogenated 1,4-diazine rings condensed with carbocyclic rings or ring systems
    • C07D241/38—Heterocyclic compounds containing 1,4-diazine or hydrogenated 1,4-diazine rings condensed with carbocyclic rings or ring systems with only hydrogen or carbon atoms directly attached to the ring nitrogen atoms
    • C07D241/40—Benzopyrazines
    • C07D241/44—Benzopyrazines with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to carbon atoms of the hetero ring
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D401/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
    • C07D401/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings
    • C07D401/04—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings directly linked by a ring-member-to-ring-member bond
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D471/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00
    • C07D471/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains two hetero rings
    • C07D471/06—Peri-condensed systems
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B23/00—Methine or polymethine dyes, e.g. cyanine dyes
    • C09B23/02—Methine or polymethine dyes, e.g. cyanine dyes the polymethine chain containing an odd number of >CH- or >C[alkyl]- groups
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B23/00—Methine or polymethine dyes, e.g. cyanine dyes
    • C09B23/02—Methine or polymethine dyes, e.g. cyanine dyes the polymethine chain containing an odd number of >CH- or >C[alkyl]- groups
    • C09B23/04—Methine or polymethine dyes, e.g. cyanine dyes the polymethine chain containing an odd number of >CH- or >C[alkyl]- groups one >CH- group, e.g. cyanines, isocyanines, pseudocyanines
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B23/00—Methine or polymethine dyes, e.g. cyanine dyes
    • C09B23/02—Methine or polymethine dyes, e.g. cyanine dyes the polymethine chain containing an odd number of >CH- or >C[alkyl]- groups
    • C09B23/06—Methine or polymethine dyes, e.g. cyanine dyes the polymethine chain containing an odd number of >CH- or >C[alkyl]- groups three >CH- groups, e.g. carbocyanines
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B23/00—Methine or polymethine dyes, e.g. cyanine dyes
    • C09B23/02—Methine or polymethine dyes, e.g. cyanine dyes the polymethine chain containing an odd number of >CH- or >C[alkyl]- groups
    • C09B23/08—Methine or polymethine dyes, e.g. cyanine dyes the polymethine chain containing an odd number of >CH- or >C[alkyl]- groups more than three >CH- groups, e.g. polycarbocyanines
    • C09B23/083—Methine or polymethine dyes, e.g. cyanine dyes the polymethine chain containing an odd number of >CH- or >C[alkyl]- groups more than three >CH- groups, e.g. polycarbocyanines five >CH- groups
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B23/00—Methine or polymethine dyes, e.g. cyanine dyes
    • C09B23/02—Methine or polymethine dyes, e.g. cyanine dyes the polymethine chain containing an odd number of >CH- or >C[alkyl]- groups
    • C09B23/08—Methine or polymethine dyes, e.g. cyanine dyes the polymethine chain containing an odd number of >CH- or >C[alkyl]- groups more than three >CH- groups, e.g. polycarbocyanines
    • C09B23/086—Methine or polymethine dyes, e.g. cyanine dyes the polymethine chain containing an odd number of >CH- or >C[alkyl]- groups more than three >CH- groups, e.g. polycarbocyanines more than five >CH- groups
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B23/00—Methine or polymethine dyes, e.g. cyanine dyes
    • C09B23/10—The polymethine chain containing an even number of >CH- groups
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B23/00—Methine or polymethine dyes, e.g. cyanine dyes
    • C09B23/10—The polymethine chain containing an even number of >CH- groups
    • C09B23/105—The polymethine chain containing an even number of >CH- groups two >CH- groups
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B23/00—Methine or polymethine dyes, e.g. cyanine dyes
    • C09B23/10—The polymethine chain containing an even number of >CH- groups
    • C09B23/107—The polymethine chain containing an even number of >CH- groups four >CH- groups
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B23/00—Methine or polymethine dyes, e.g. cyanine dyes
    • C09B23/14—Styryl dyes
    • C09B23/145—Styryl dyes the ethylene chain carrying an heterocyclic residue, e.g. heterocycle-CH=CH-C6H5
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C1/00—Photosensitive materials
    • G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
    • G03C1/06—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with non-macromolecular additives
    • G03C1/08—Sensitivity-increasing substances
    • G03C1/10—Organic substances
    • G03C1/12—Methine and polymethine dyes
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C1/00—Photosensitive materials
    • G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
    • G03C1/06—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with non-macromolecular additives
    • G03C1/08—Sensitivity-increasing substances
    • G03C1/10—Organic substances
    • G03C1/12—Methine and polymethine dyes
    • G03C1/14—Methine and polymethine dyes with an odd number of CH groups
    • G03C1/18—Methine and polymethine dyes with an odd number of CH groups with three CH groups
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C1/00—Photosensitive materials
    • G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
    • G03C1/485—Direct positive emulsions
    • G03C1/48515—Direct positive emulsions prefogged
    • G03C1/48523—Direct positive emulsions prefogged characterised by the desensitiser
    • G03C1/4853—Direct positive emulsions prefogged characterised by the desensitiser polymethine dyes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
    • Y10S430/001—Electric or magnetic imagery, e.g., xerography, electrography, magnetography, etc. Process, composition, or product
    • Y10S430/102—Electrically charging radiation-conductive surface

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Plural Heterocyclic Compounds (AREA)
  • Indole Compounds (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)

Abstract

1,186,720. Cyanine dyes. EASTMAN KODAK CO. 5 May, 1967 [11 Aug., 1966; 17 Jan., 1967], No. 20914/67. Heading C4P. [Also in Division G2] Cyanine dyes have the formula wherein R is alkyl, substituted alkyl, aryl, acyl or an organic sulphonyl radical; R 1 is alkyl or substituted alkyl ; R 2 and R 3 are each H, alkyl, aryl, carboxyl, sulpho, -NO 2 , -CN, or halogen; X is an anion; Z represents the non- metallic atoms to complete a heterocyclic nucleus; n is 0 or 1. Z may represent the atoms for completing a thiazole, oxazole, selenazole, thiazoline, pyridine, quinoline or imidazole nucleus. The dyes may be prepared by condensing the carbazole-3-carboxaldehyde with a methyl substituted quaternary N-containing heterocyclic compound in a dehydrating medium, e.g. (CH 3 CO) 2 0, at an elevated temp., e.g. under reflux.
GB20914/67A 1966-03-11 1967-05-05 Photographic Emulsions Expired GB1186720A (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
US53345566A 1966-03-11 1966-03-11
US57169566A 1966-08-11 1966-08-11
US57318366A 1966-08-18 1966-08-18
US60976167A 1967-01-17 1967-01-17
US60974067A 1967-01-17 1967-01-17
US60979167A 1967-01-17 1967-01-17
US60979267A 1967-01-17 1967-01-17

Publications (1)

Publication Number Publication Date
GB1186720A true GB1186720A (en) 1970-04-02

Family

ID=27569830

Family Applications (3)

Application Number Title Priority Date Filing Date
GB01294/67A Expired GB1186714A (en) 1966-03-11 1967-03-10 Photographic Emulsions
GB20919/67A Expired GB1190031A (en) 1966-03-11 1967-05-05 Cyanine Dyes
GB20914/67A Expired GB1186720A (en) 1966-03-11 1967-05-05 Photographic Emulsions

Family Applications Before (2)

Application Number Title Priority Date Filing Date
GB01294/67A Expired GB1186714A (en) 1966-03-11 1967-03-10 Photographic Emulsions
GB20919/67A Expired GB1190031A (en) 1966-03-11 1967-05-05 Cyanine Dyes

Country Status (11)

Country Link
US (2) US3492123A (en)
JP (1) JPS521300B1 (en)
BE (3) BE695364A (en)
BR (1) BR6787702D0 (en)
CH (1) CH474086A (en)
DE (2) DE1547793A1 (en)
ES (1) ES337856A1 (en)
FR (1) FR1513840A (en)
GB (3) GB1186714A (en)
NO (1) NO129424B (en)
SE (1) SE345170B (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3650758A (en) * 1970-07-20 1972-03-21 Eastman Kodak Co Direct-positive print-out silver halide emulsion fogged to visible density
DE2132937A1 (en) * 1971-07-02 1973-01-18 Agfa Gevaert Ag SPECTRALLY SENSITIVIZED DIRECT POSITIVE EMULSION LAYERS
JPS5547378B2 (en) * 1971-09-04 1980-11-29
GB1453833A (en) * 1973-01-25 1976-10-27 Agfa Gevaert Direct-positive silver halide emulsions
GB1460438A (en) * 1973-05-18 1977-01-06 Agfa Gevaert Spectral sensitization of direct-positive silver a
US4009041A (en) * 1974-10-03 1977-02-22 Polaroid Corporation Fogged, direct-positive silver halide emulsion containing a gallium sulfide semiconductor
US4355098A (en) * 1981-02-11 1982-10-19 E. I. Du Pont De Nemours And Company Supersensitizing direct positive dye combinations
US5049483A (en) * 1989-06-08 1991-09-17 Konica Corporation Direct positive silver halide photographic light-sensitive material and a processing method therefor
US5240828A (en) * 1989-12-22 1993-08-31 Eastman Kodak Company Direct reversal emulsions
JP3679207B2 (en) * 1996-09-12 2005-08-03 富士写真フイルム株式会社 Silver halide photographic material
EP1139164A1 (en) * 2000-03-27 2001-10-04 Fuji Photo Film Co., Ltd. Silver halide photographic material
AR072297A1 (en) 2008-06-27 2010-08-18 Novartis Ag DERIVATIVES OF INDOL-2-IL-PIRIDIN-3-ILO, PHARMACEUTICAL COMPOSITION THAT INCLUDES THEM AND ITS USE IN MEDICINES FOR THE TREATMENT OF DISEASES MEDIATED BY THE SYNTHESIS ALDOSTERONE.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB723019A (en) * 1952-02-05 1955-02-02 Gevaert Photo Prod Nv Improvements in or relating to the manufacture of photographic material
BE527594A (en) * 1953-03-28
BE555921A (en) * 1956-03-19
GB1053082A (en) * 1963-06-10

Also Published As

Publication number Publication date
GB1190031A (en) 1970-04-29
JPS521300B1 (en) 1977-01-13
DE1547793A1 (en) 1969-11-20
BE695360A (en) 1967-09-11
ES337856A1 (en) 1968-08-16
DE1597528A1 (en) 1971-11-25
DE1547779A1 (en) 1970-07-23
CH474086A (en) 1969-06-15
SE345170B (en) 1972-05-15
BE695364A (en) 1967-09-11
NO129424B (en) 1974-04-08
DE1547792A1 (en) 1969-12-04
GB1186714A (en) 1970-04-02
FR1513840A (en) 1968-02-16
BR6787702D0 (en) 1973-01-18
BE695367A (en) 1967-09-11
US3501310A (en) 1970-03-17
US3492123A (en) 1970-01-27
DE1597528B2 (en) 1976-11-25

Similar Documents

Publication Publication Date Title
GB1281567A (en) Photographic silver halide emulsions
GB1186720A (en) Photographic Emulsions
GB1293862A (en) Supersensitized silver halide photographic emulsion
GB1110577A (en) Dyes
GB1529747A (en) Light-sensitive silver halide photographic materials
GB1128113A (en) Dyes, processes for preparing them and photographic elements containing them
GB893681A (en) Improvements in dye-sensitized photographic emulsions
GB764658A (en) Improvements in sensitized photographic emulsions
GB1155405A (en) Supersensitized Photographic Silver Halide Emulsions
GB764626A (en) Improvements in sensitized photographic emulsions
GB868797A (en) Improvements in dye-sensitized photographic emulsions
GB1312101A (en) Super-sensitized silver halide photographic emulsion
GB1232877A (en)
GB1431606A (en) Direct-positive silver halide emulsions
GB979045A (en) Polymethine dyes, process of making them and photographic elements containing them
GB1188784A (en) Cyanine Dyes, Processes of Making them and Photographic Materials Containing them
GB1215871A (en) Optically sensitized light-sensitive material
GB620482A (en) Trinuclear cyanine dyes and photographic light-sensitive elements containing them
GB783596A (en) Improvements in sensitized photographic emulsions
GB1240522A (en) Merocyanine dyes and photographic materials containing them
GB1297077A (en)
GB740770A (en) Improvements in and relating to polymethine dyes and photographic silver halide emulsions containing them
GB1253839A (en) Novel cyanine dyes
GB858062A (en) Improvements in dye-sensitized photographic emulsions
GB1348818A (en) Spectrally sensitized rapid-processing photographic material

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees