Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 4863845 | Internal latent image type direct positive silver halide emulsions and process for producing the same In an internal latent image type direct positive silver halide emulsion containing core/shell type silver halide grains wherein at least light-sensitive sites of the silver halide internal core which has been subjected to doping with metal ions or chemica... | 09/05/1989 |
| 4859579 | Silver halide photographic material A silver halide photographic material comprising a support having thereon at least one light-sensitive silver halide photographic emulsion layer, wherein at least one layer selected from the emulsion layer and other hydrophilic colloid layers contains at ... | 08/22/1989 |
| 4840879 | Direct positive image-forming process The present invention relates to a process for forming a direct positive color image comprising (a) imagewise exposing a direct positive photosensitive silver halide color photographic material to light to yield an imagewise exposed material, said photogr... | 06/20/1989 |
| 4839271 | Direct positive dimethine cyanine dyes containing 1-aryl-2-heteroaryl indole nucleus A fogged direct positive photographic silver halide emulsion containing a sensitizing amount of at least one cyanine dye defined above, e.g., cyanine dye containing a 1-phenylindole nucleus substituted in the 2-position with the 3-pyridyl group. The said ... | 06/13/1989 |
| 4820625 | Direct positive silver halide photographic material A direct positive silver halide photographic material comprising a support having thereon at least one silver halide emulsion layer comprising a prefogged direct-positive silver halide emulsion, preferably one having a chloride content of at least 70 mol%... | 04/11/1989 |
| 4818663 | Photographic materials and color proofing system A radiation-sensitive element suitable for the preparation of half-tone color proofs comprising a substrate bearing at least four separate positive acting imaging media coated thereon, said imaging media including: (1) an imaging medium capable of forming... | 04/04/1989 |
| 4804747 | Azo compound having one or two aliphatic or cycloaliphatic groups containing a total of 8 to 40 carbon atoms therein (i) A compound of the formula: ##STR1## wherein R is H, a metal or a group containing a tetravalent N atom; X is S, O, ##STR2## R1 is NO2, CN or COOY; Y is H, C1-4 -alkyl, a metal or a group containing a tetraval... | 02/14/1989 |
| 4769316 | Method for restraining the formation of re-reversal negative image in direct positive silver halide photographic materials A restraining method for restraining the formation of a re-reversal negative image is described, comprising incorporating a cyanine dye or a merocyanine dye which is electron donative and is adsorbable on silver halide in at least one hydrophilic colloid ... | 09/06/1988 |
| 4749644 | Photographic material with two size population of silver halide grains and development inhibiting agent in an emulsion layer In a light-sensitive direct posi silver halide color photographic material having photographic constituent layers comprising at least one silver halide emulsion layer containing latent image type silver halide grains not previously fogged, which is capabl... | 06/07/1988 |
| 4704349 | Process for the preparation of photographic direct-positive emulsions Photographic direct-positive emulsions with silver halide crystals of layered structure are prepared. The silver halide crystals of these emulsions can form a latent internal image and are superficially converted to silver iodide. Normal surface developer... | 11/03/1987 |
| 4670375 | Light-sensitive silver halide color photographic material having extended exposure range and improved graininess and stability to processing and time Disclosed is a light-sensitive silver halide color photographic material comprising a support and a plurality of silver halide emulsion layers on the support, the emulsion layers being substantially identical in color sensitivity but different in sensitiv... | 06/02/1987 |
| 4643965 | Direct positive photographic light-sensitive materials A direct positive photographic light-sensitive material is described, comprising a support and at least one internal latent image type silver halide emulsion layer containing core/shell type silver halide grains which are composed of a silver halide core ... | 02/17/1987 |
| 4639416 | Internal latent image-type silver halide emulsion An internal latent image-type silver halide emulsion containing core/shell type silver halide grains with a mean grain size of about 0.4 μm or less, the grains comprising a core of chemically sensitized silver halide and a shell of silver halide covering... | 01/27/1987 |
| 4636457 | Process for forming direct positive images, direct positive silver halide elements, compositions and compounds as characteristics feature of such processes and elements Direct positive photographic elements are disclosed employing internal latent image silver halide emulsions associated with developer autoxidation promoter agents constituted by 5 or 6 membered nucleus-containing heterocyclic compounds comprising an azome... | 01/13/1987 |
| 4629678 | Internal latent image-type direct positive silver halide light-sensitive material An internal latent image-type direct positive silver halide light-sensitive material is described, comprising a support having at least one photographic emulsion layer thereon, wherein said layer contains internal latent image-type direct positive silver ... | 12/16/1986 |
| 4613563 | Silver halide photographic light-sensitive material A silver halide photographic light-sensitive material comprising a support having provided thereon at least one internal latent image type direct positive silver halide emulsion layer is disclosed, wherein (1) said internal latent image type direct positive si... | 09/23/1986 |
| 4610959 | Direct positive silver halide photographic materials A direct positive silver halide photographic material is described, comprising a support having thereon at least an internal latent image-type direct positive silver halide emulsion layer containing a hydrazine series nucleating agent, wherein said silver... | 09/09/1986 |
| 4591549 | Process for preparing silver halide emulsions Improved process for preparing silver chlorobromide or silver chloroiodobromide emulsion wherein first silver ion solution and second halide ion solution are mixed by double jet method and mole % of silver bromide, silver chloride and silver iodide are in... | 05/27/1986 |
| 4582779 | Internal latent image-type direct positive silver halide emulsions and photographic materials A previously unfogged internal latent image-type direct positive silver halide emulsion and a photographic material incorporating such emulsion are described, wherein the emulsion contains at least one sensitizing dye represented by formula (I): ##ST... | 04/15/1986 |
| 4581328 | Internal latent image core/shell silver halide photographic emulsions An internal latent image core/shell silver halide photographic emulsion containing core/shell silver halide grains is disclosed, the grains comprising a silver halide core which is doped with a metal ion or chemically sensitized or is both doped with a me... | 04/08/1986 |
| 4576905 | Photographically useful chalcogenazoles, chalcogenazolines, and chalcogenazolinium and chalcogenazolium salts Compounds containing an aromatic ring portion fused with a tellurazolium or derivative tellurazole, tellurazoline (including tellurazolinylidene), or tellurazolinium ring portion are disclosed together with processes and intermediates for their preparatio... | 03/18/1986 |
| 4572892 | Direct positive photographic elements with incorporated maximum density enhancing antifoggants A black and white direct positive photographic element intended for the formation of a viewable silver image is disclosed. One or more silver halide emulsion layers are present containing internal latent image forming silver halide grains. A maximum densi... | 02/25/1986 |
| 4571380 | Spectrally sensitized inner latent image type silver halide photographic emulsions An inner latent image type silver halide photographic emulsion which is spectrally sensitized by adding at least one cyanine dye represented by general formula (II) to a direct positive inner latent image type silver halide photographic emulsion and there... | 02/18/1986 |
| 4550070 | Direct positive silver halide photographic light-sensitive materials Direct positive silver halide photographic light-sensitive materials are described in which at least one layer of light-sensitive silver halide photographic emulsion layers and other hydrophilic colloid layers applied on a base contains a mercapto compoun... | 10/29/1985 |
| 4539291 | Direct positive silver halide photographic materials A direct positive silver halide material is disclosed. The material is comprised of a support base having a silver halide emulsion layer thereon which contains at least one phenazine series compound represented by the general formula (I), (II) or (III) an... | 09/03/1985 |
| 4529689 | Silver sulfinate photothermographic films Improved heat developable silver films are produced upon coating and drying a binder composition containing (a) a substantially light-insensitive silver sulfinate, (b) a silver halide photocatalyst, and (c) a developer. A preferred film contains (a) silve... | 07/16/1985 |
| 4521508 | Silver halide photographic light-sensitive materials A silver halide photographic light-sensitive material is disclosed. The material is comprised of a support base having thereon a silver halide emulsion layer and a protective layer. The material contains a photosensitive silver halide emulsion and inside ... | 06/04/1985 |
| 4518689 | Spectrally sensitized inner latent image type silver halide photographic emulsions An inner latent image type silver halide photographic emulsion which is spectrally sensitized by adding at least one monomethine cyanine dye represented by general formula (II) to a direct positive inner latent image type silver halide photographic emulsi... | 05/21/1985 |
| 4504570 | Direct reversal emulsions and photographic elements useful in image transfer film units High aspect ratio tabular grain direct reversal silver halide emulsions are disclosed. The emulsions can be incorporated in photographic elements, such as multicolor photographic elements. Image transfer film units incorporating these direct reversal emul... | 03/12/1985 |
| 4495274 | Direct-positive silver halide photographic material Direct positive silver halide photographic materials comprising a support, a silver halide emulsion layer comprising fogged silver halide particles prepared in the presence of a water soluble iridium salt or a water soluble rhodium salt, and a hydrophilic... | 01/22/1985 |
| 4482627 | Method of treating direct positive silver halide sensitive material A direct positive silver halide sensitive material and a method of treating the material are disclosed. The method of treatment comprises providing an exposed direct positive silver halide sensitive material comprised of a base having thereon a compound r... | 11/13/1984 |
| 4481285 | Method of treating direct positive silver halide sensitive material A method of treating a direct positive silver halide sensitive material is disclosed. The material is comprised of a base having thereon a compound represented by the general formula (I), a sensitive silver halide photographic emulsion layer and a hydroph... | 11/06/1984 |
| 4444874 | Photographic elements containing direct-positive emulsions and processes for their use Photographic elements particularly adapted for forming direct-positive images are disclosed in which a radiation-sensitive core-shell emulsion layer and a silver halide emulsion layer incapable of forming a surface latent image within the direct-positive ... | 04/24/1984 |
| 4444865 | Blended grain direct-positive emulsions and photographic elements and processes for their use Blended emulsions for use in forming a direct-positive image are disclosed. The emulsions are comprised of a first, radiation-sensitive core-shell grain population having a relatively low coefficient of variation and a second, substantially smaller size g... | 04/24/1984 |
| 4444871 | Method for forming a direct positive color image Method for forming a direct positive-color image in which an imagewise exposure is applied to a direct positive silver halide color photosensitive material comprising a support and at least one light-sensitive silver halide emulsion layer which contain in... | 04/24/1984 |
| 4440851 | Method for the formation of a direct positive image A method for obtaining direct positive images wherein a photographic material having a support and at least two silver halide emulsion layers coated thereon, each layer having a different spectral sensitivity, said emulsions being of the internal latent i... | 04/03/1984 |
| 4435491 | Electrophotographic process for the production of lithographic printing plates and light-sensitive materials for use therein A process for the production of lithographic printing plates, and a light-sensitive material for use in the process are described. The light-sensitive material comprises an electrically conductive support having a hydrophilic surface, and a positive type ... | 03/06/1984 |
| 4433050 | Direct positive type light sensitive silver halide photographic material A direct positive type light sensitive silver halide photographic material is disclosed. At least one layer containing an unfogged internal latent image type silver halide emulsion, is provided on a support, and an internal latent image type silver halide... | 02/21/1984 |
| 4431730 | Process for the preparation of internal latent image type silver halide photographic emulsions A process for the preparation of an internal latent image type silver halide emulsion containing silver halide grains comprising a central core of silver halide doped with metal ions, chemically sensitized or a combination thereof and an outer shell of si... | 02/14/1984 |
| 4431731 | Internal latent image silver halide emulsions An internal latent image silver halide emulsion is disclosed comprising core/shell silver halide particles having a chemically sensitized surface which are composed of a core of silver halide doped with metal ions and/or subjected to chemical sensitizatio... | 02/14/1984 |
