Mark Lelental has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
Abstract: A heat developable, photographic material comprising (a) a photographic metal compound with (b) an oxidation-reduction image-forming combination comprising (i) a tellurium (II) or (IV) compound as an oxidizing agent and (ii) a reducing agent provides an improved amplified image. The photographic metal compound can be, for example, photograhic silver halide. A developed image can be provided in the material after imagewise exposure by heating the element to moderately elevated temperatures.
Abstract: A positive image is formed by imagewise passing a current through a substantially uniform layer of physically developable catalyst having a coverage of 1 .times. 10.sup.-6 to 1 .times. 10.sup.-10 g/cm.sup.2. The catalytic ability of the catalyst layer is destroyed by subjecting the image areas to greater than 1 .times. 10.sup.-8 coulombs/cm.sup.2. Physical development of the thus exposed catalyst layer produces the positive image. A photoconductive element which is useful in this process is also disclosed. This photographic element comprises:(1) a non-catalytic conductive support;(2) a substantially uniform first layer coated on the conductive support comprising a physically developable catalyst having a coverage of 1 .times. 10.sup.-6 to 1 .times. 10.sup.-10 g/cm.sup.
Abstract: A heat developable, photographic material comprising, in reactive association, (a) a photosensitive, transition metal carbonyl compound, (b) an oxidation-reduction image-forming combination comprising (i) a tellurium (II) or (IV) compound as an oxidizing agent, with (ii) a reducing agent, and (c) a binder can provide an improved non-silver image. After imagewise exposure of the heat developable material, an image can be developed by merely heating the material.
Abstract: A process for the formation of formazan dye images employing nuclei of metals from Groups VIIIB and/or IB of the periodic table to catalyze the reduction of tetrazolium salts to the corresponding formazan dye by a reducing agent.
Abstract: A physical developer composition for latent images comprises a mixture of at least one copper salt and at least one nickel salt and a reducing agent for copper and nickel salts wherein the nickel and copper salts are in such proportions that upon reduction to a metal alloy, the alloy contains from 9 to 98 mole percent copper and from 2 to 91 mole percent nickel.