UST104802I4 - Nonionic alkynyl compounds and applications thereof to silver halide photography - Google Patents

Nonionic alkynyl compounds and applications thereof to silver halide photography Download PDF

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Publication number
UST104802I4
UST104802I4 US06/581,938 US58193884A UST104802I4 US T104802 I4 UST104802 I4 US T104802I4 US 58193884 A US58193884 A US 58193884A US T104802 I4 UST104802 I4 US T104802I4
Authority
US
United States
Prior art keywords
alkynyl
nonionic
applications
silver halide
latent image
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.)
Pending
Application number
US06/581,938
Inventor
Richard L. Parton
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 filed Critical
Priority to US06/581,938 priority Critical patent/UST104802I4/en
Application granted granted Critical
Publication of UST104802I4 publication Critical patent/UST104802I4/en
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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
    • G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
    • G03C1/485—Direct positive emulsions
    • G03C1/48538—Direct positive emulsions non-prefogged, i.e. fogged after imagewise exposure
    • G03C1/48546—Direct positive emulsions non-prefogged, i.e. fogged after imagewise exposure characterised by the nucleating/fogging agent

Abstract

A photographically useful alkynyl compound is disclosed which is nonionic under aqueous alkaline photographic processing conditions. The alkynyl compound is comprised of an alkynyl group attached to a methylene group through a divalent chalcogen or an imino group. The methylene group is activated by an electron withdrawing substituent. The alkynyl compounds are useful in direct positive internal latent image forming emulsions as nucleating agents and in negative working surface latent image emulsions to increase speed and/or contrast.
US06/581,938 1983-07-01 1984-02-21 Nonionic alkynyl compounds and applications thereof to silver halide photography Pending UST104802I4 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US06/581,938 UST104802I4 (en) 1983-07-01 1984-02-21 Nonionic alkynyl compounds and applications thereof to silver halide photography

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US51014683A 1983-07-01 1983-07-01
US06/581,938 UST104802I4 (en) 1983-07-01 1984-02-21 Nonionic alkynyl compounds and applications thereof to silver halide photography

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US51014683A Continuation 1983-07-01 1983-07-01

Publications (1)

Publication Number Publication Date
UST104802I4 true UST104802I4 (en) 1984-11-06

Family

ID=27056813

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/581,938 Pending UST104802I4 (en) 1983-07-01 1984-02-21 Nonionic alkynyl compounds and applications thereof to silver halide photography

Country Status (1)

Country Link
US (1) UST104802I4 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5389510A (en) * 1993-12-16 1995-02-14 Eastman Kodak Company Photographic elements containing alkynylamine dopants
US5413905A (en) * 1993-12-16 1995-05-09 Eastman Kodak Company Photographic sensitivity increasing alkynylamine compounds and photographic elements

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5389510A (en) * 1993-12-16 1995-02-14 Eastman Kodak Company Photographic elements containing alkynylamine dopants
US5413905A (en) * 1993-12-16 1995-05-09 Eastman Kodak Company Photographic sensitivity increasing alkynylamine compounds and photographic elements

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