Minnesota Mining and Manufacturing Company

Other

Imation Corporation

Charles G Barlow

Ronald W Burrows

Bernard A Lea

Ivan H Skoog

Thomas D Hellings

Andrew W Mott

Richard R Ollmann, Jr

Robert J Nairne

Peter D Sills

Alexis Sarah Zinn-Warner

Michael G Weeks

Peter R Johns

A L Beck

A black-and-white, negative-acting, silver halide emulsion is described which gives improved image tone when used in a photographic element. The toning agents are based on dithio-substituted compounds having the following general structures: ##STR1## where R.sub.1 and R.sub.2, independently, are selected from the group consisting of alkyl, aryl and heterocyclic groups, or R.sub.1 and R.sub.2 together complete a ring;

Image toners for silver halide photographic films

Silver halide photographic emulsions may be sensitized by the use of hydrido-phosphine noble metal compounds and especially platinum (II) compounds.

Noble metal complexes to sensitize silver halide emulsions

Infra-red sensitizing dyes for silver halide having a nucleus of the general formula: ##STR1## in which Q represents Cl or Br,

Infra-red sensitizing dyes for silver halide

A method for making printing plates wherein free radicals generated in a metallic silver image migrate into an image-receiving layer which comprises a free radical polymerizable polymer, thereby forming a printing image of hardened polymer in the image-receiving layer. Also, plate-making elements which may be used in such method to make lithographic printing plates.

Method for forming printing plates and plate-making element

Infra-red sensitizing dyes for silver halide having a mucleus of the general formula: ##STR1## in which: Q represents Cl or Br,

Infra-red sensitising dyes for silver halide

An anti-rape device adapted to be inserted into the vaginal cavity of a human female, which comprises a base member to which is attached elongated penis penetrating means which projects outwardly toward the mouth of the vaginal cavity when the device is operationally positioned within the vaginal cavity of a human female. The elongated penis penetrating means is surrounded or enveloped by retractable means which serves to prevent the walls of the vaginal cavity from contacting the penis penetrating means and which is adapted to be retracted upon penetration of the vaginal cavity by a male penis to permit penetration of the penis by the penis penetrating means.

Growing community of inventors

Saint Paul, MN, United States of America

Charles G Barlow