Patents Examined by Won H. Louie
  • Patent number: 4916048
    Abstract: The invention is directed to an optical recording member including a thin film photosensitive layer provided on a base. The thin film photosensitive layer may vary between a low optical density state and a high optical density state when optical energy is applied thereto. This thin film photosensitive layer contains a first element which may be a metal or semimetal, a second element which is at least one selected from Te, Ge, Sn, Al, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Mo, Rh, Pd, Ag, Cd, In, Ta, W, Pt, Au, Tl, Pb, Si, Sb, Bi, and an oxygen element. Part of the oxygen element is bonded with the first element to form its oxide. The ratio x of the total number of atoms of the oxygen element to that of the first element, when the maximum valence of the first element in a stable oxide state is n, is according to the relation of 0<x<n/2. At least part of the second element exists in a non-oxide state. This thin film photosensitive layer is formed by a vacuum deposition or sputtering method.
    Type: Grant
    Filed: November 7, 1986
    Date of Patent: April 10, 1990
    Inventors: Noboru Yamada, Kenichi Nishiuchi, Mutsuo Takenaga
  • Patent number: 4828962
    Abstract: Photographic elements comprising a negative working silver halide emulsion containing high intensity reciprocity failure reducing amounts of dopant comprising both ruthenium and iridium ions.
    Type: Grant
    Filed: September 8, 1987
    Date of Patent: May 9, 1989
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Nicholas E. Grzeskowiak, Keith A. Penfound
  • Patent number: 4824764
    Abstract: A silver halide photographic material comprising a support having at least one light-sensitive silver halide emulsion layer on the support, wherein at least one of the emulsion layer and other constituent layers contains at least one compound represented by formula (I) and at least one compound represented by formula (II): ##STR1## wherein R.sub.0 is an organic group having 7 to 30 carbon atoms, A is a substituted or unsubstituted phenylene group, or a substituted or unsubstituted naphthylene group, and X is NH or 0, ##STR2## wherein R.sub.1 is an aliphatic, aromatic or heterocyclic group; R.sub.
    Type: Grant
    Filed: May 20, 1987
    Date of Patent: April 25, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yoshio Inagaki, Nobuaki Inoue
  • Patent number: 4824748
    Abstract: A color separation filter which is formed through use of dyestuffs provided with monomolecular film forming properties in which molecules can be absorbed by air-water interfaces and patterning properties capable of forming patterns through exposure by ionizing radiations. A method of manufacturing a color separation filter which comprises a step of forming monomolecular films of dyestuffs provided with monomolecular film forming properties and patterning properties, a step of piling a plurality of monomolecular films to form cumulative films and a step of patterning the cumulative films by radiating ionizing radiations to the cumulative films.
    Type: Grant
    Filed: February 22, 1988
    Date of Patent: April 25, 1989
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hideo Saeki, Shigeyuki Uematsu
  • Patent number: 4820617
    Abstract: A heat-developable photosensitive material of which thermal fogging is markedly suppressed without detriment to image characteristics such as sensitivity, which is prepared by forming a single layer or multiple layers of a heat-developable photosensitive element comprising at least (a) an oxidation-reduction image-forming component comprising a long-chain fatty acid silver salt and a reducing agent, (b) a photosensitive silver halide or/and a photosensitive slilver halide-forming component, (c) a binder, and (d) at least one member selected from the compounds represented by the following general formula:HOOC--R--COOHwherein R represents an alkylene or alkenylene group of at least 4 carbon atoms which may be linear or branched, on a support.
    Type: Grant
    Filed: December 30, 1987
    Date of Patent: April 11, 1989
    Assignee: Oriental Photo Industrial Co., Ltd.
    Inventors: Tetuya Higuchi, Akira Tsukada, Yukio Takegawa
  • Patent number: 4820625
    Abstract: 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%, said emulsion layer or a hydrophilic colloid layer adjacent to said emulsion layer containing at least one compound represented by the following general formula (I) and, optionally, a specified organic desensitizer, ##STR1## wherein Z.sub.
    Type: Grant
    Filed: September 21, 1987
    Date of Patent: April 11, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Naomi Saeki, Nobuaki Inoue, Toshinao Ukai, Yuji Mihara
  • Patent number: 4820613
    Abstract: The present invention provides a method of hardening a proteinaceous surface layer of a photographic silver halide element by incorporating a dextran derivative in said proteinaceous surface layer, said dextran derivative being the reaction product of dextran and an epihalohydrin. The invention also provides a photographic element comprising at least one silver halide emulsion layer and at least one proteinaceous surface layer comprising the reaction product of dextran and an epihalohydrin.
    Type: Grant
    Filed: July 29, 1987
    Date of Patent: April 11, 1989
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Joan T. Vermeersch, Hubert Vandenabeele, Jacques L. Vervecken, Daniel M. Timmerman
  • Patent number: 4818659
    Abstract: A silver halide photographic material for use in a bright room is disclosed comprising a support having thereon at least two silver halide emulsion layers, each of the emulsion layers having a different sensitivity and comprising silver chloride grains or silver chlorobromide grains having at least about 80 mol % silver chloride, each of the silver halide emulsions layers containing from about 1.times.10.sup.-7 mol to about 1.times.10.sup.-4 mol of a rhodium salt per mol of silver, wherein the sensitivity of the lower emulsion layer (the emulsion layer coated nearer to the support) is higher than the sensitivity of the upper emulsion layer (the emulsion layer coated farther from the support) and at least one of the silver halide emulsion layers or different hydrophilic colloid layers contains a hydrazine derivative and at least one of the silver halide emulsion layers of different hydrophilic colloid layers contains a dry compound having a .sup..lambda. max of from about 400 nm to about 550 nm.
    Type: Grant
    Filed: April 7, 1987
    Date of Patent: April 4, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Toshiro Takahashi, Ken-ichi Kuwabara, Kimitaka Kameoka, Masahiro Okada
  • Patent number: 4818668
    Abstract: A silver halide color photographic light-sensitive material is described, containing at least one coupler represented by formula (I) ##STR1## wherein R.sub.1 represents a substituted or unsubstituted ureido group or a substituted or unsubstituted acrylamino group; R.sub.2 represents substituted or unsubstituted acylamino group; L represents a group which is capable of being released from the phenolic group of formula (I) in a reaction with the oxidation product of a developing agent, and releases -O-A thereafter; n represents 0 or 1; and A represents an aromatic group including a hydroxy group or a substituted or unsubstituted amino group at least one of the 2-position and the 4-position thereof.
    Type: Grant
    Filed: May 26, 1987
    Date of Patent: April 4, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Seiji Ichijima, Hideo Usui, Kohzaburoh Yamada
  • Patent number: 4816373
    Abstract: Disclosed is a method for producing images which comprises imagewise exposing a silver halide photographic light-sensitive material and then developing the exposed light-sensitive material in the presence of a compound represented by the following general formula [I], [II] or [III]: ##STR1## wherein Ar represents an aryl group, R represents a hydrogen atom, an alkyl group, an alkenyl group, an unsaturated hetero ring group or an aryl group and R.sub.1 and R.sub.2 each represent a hydrogen atom or a group represented by the general formula (i): ##STR2## wherein R.sub.0 represents an alkyl group, an alkenyl group, an aryl group, an alkoxy group or an aryloxy group and n is an integer of 1 or 2. ##STR3## wherein Ar, R.sub.1 and R.sub.2 are as defined in the general formula [I] and R.sub.3 and R.sub.4 each represent a hydrogen atom, an alkyl group, an aryl group, an unsaturated hetero ring group or a substituted amino group and R.sub.3 and R.sub.
    Type: Grant
    Filed: February 2, 1987
    Date of Patent: March 28, 1989
    Assignee: Mitsubishi Paper Mills, Ltd.
    Inventors: Minoru Ohashi, Shoichi Horii, Satoshi Kaneko
  • Patent number: 4814263
    Abstract: A direct-positive silver halide emulsion comprising fine grain reduction and gold surface fogged silver halide grains containing an electron-trapping effective amount of at least one Group VIII metal dopant, at least 75% by weight of all silver halide grains in said emulsion being silver halide grains wherein at least 80 mole percent of the halide within said grains is chloride.
    Type: Grant
    Filed: July 21, 1987
    Date of Patent: March 21, 1989
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Philip Hine
  • Patent number: 4810627
    Abstract: Compounds corresponding to the formula: ##STR1## wherein R.sub.1 and R.sub.2 denote alkyl groups with 1 to 8 carbon atoms, an optionally substituted alkenyl group with 2 to 5 carbon atoms, an optionally substituted cycloalkyl group with 5 or 6 carbon atoms or an optionally substituted aryl group or R.sub.1 and R.sub.2 together represent the ring members required to form a 5- or 6-membered cycloalkyl or cycloalkenyl group, are suitable for use as antifoggants in photographic recording materials.
    Type: Grant
    Filed: March 18, 1988
    Date of Patent: March 7, 1989
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Hans Ohlschlager, Walter Patzold, Helmut Reuss, Karl Steinbeck
  • Patent number: 4808516
    Abstract: A photographic emulsion comprising silver halide, a spectral sensitizing dye, and rhodanine.
    Type: Grant
    Filed: July 21, 1987
    Date of Patent: February 28, 1989
    Assignee: Eastman Kodak Company
    Inventors: Anthony D. Gingello, Hermano P. Rocha
  • Patent number: 4806448
    Abstract: Compounds of formula I ##STR1## in conjunction with compounds that donate acid when exposed to actinic radiation, are suitable for use as positive photoresists. In formula I, R.sup.1 and R.sup.2 are hydrogen, alkyl, aryl, cycloalkyl, aralkyl or alkaryl, R.sup.3 to R.sup.8 are hydrogen or lower alkyl, X is --O-- or --NR.sup.9 --, where R.sup.9 is hydrogen or C.sub.1 -C.sub.4 alkyl n is 0 or 1, m is 2, 3 or 4 and Q is an organic radical of valency m.The photoresists are suitable for making printing formes, printed circuits, integrated circuits or silver-free photographic films.
    Type: Grant
    Filed: November 27, 1987
    Date of Patent: February 21, 1989
    Assignee: Ciba-Geigy Corporation
    Inventor: Martin Roth
  • Patent number: 4806664
    Abstract: Tetraphenyldithiolene complexes of the formula ##STR1## and novel asymmetrically substituted benzoins of the formula ##STR2## where X.sup.1, X.sup.2 and X have the meanings stated in the description and Me is nickel, palladium or platinum. The complexes have very high absorption in the range from 800 to 950 nm and are readily soluble in the plastics used for the production of optical recording materials.The recording materials produced using these complexes have a very high signal/noise ratio.
    Type: Grant
    Filed: June 8, 1987
    Date of Patent: February 21, 1989
    Assignee: BASF Aktiengesellschaft
    Inventors: Wolfgang Schrott, Peter Neumann, Bernhard Albert, Michael Thomas, Helmut Barzynski, Klaus-Dieter Schomann, Harald Kuppelmaier
  • Patent number: 4806451
    Abstract: The invention relates to a process for producing an image on a light-sensitive tonable layer comprising the steps of:(A) exposing the light-sensitive layer imagewise to produce imagewise tacky and complementary non-tacky areas;(B) bringing the imagewise-exposed layer into surface-to-surface contact with a supported non-photosensitive transfer layer containing at least one finely divided powder and/or a dissolved dye in a binder; and(C) separating the transfer layer from the light-sensitive layer, whereby the transfer layer adheres selectively to the imagewise tacky areas,the improvement wherein, the binder of the transfer layer consists essentially of(a) about 55-97 wt. % of at least one polymer in the form of a powder having a minimum film-forming temperature of above 50.degree. C., and(b) about 3-45 wt.
    Type: Grant
    Filed: June 24, 1987
    Date of Patent: February 21, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Helmut H. Frohlich
  • Patent number: 4804599
    Abstract: Dyes of the formula ##STR1## wherein Y completes a benzothiazole or benzoselenazole nucleus, R.sub.1 is alkyl, R.sub.2 and R.sub.3 are hydrogen, alkyl or phenyl and Z is alkylene, are suitable for sensitizing fine grain silver halide emulsions.
    Type: Grant
    Filed: May 24, 1988
    Date of Patent: February 14, 1989
    Assignee: Ciba-Geigy AG
    Inventor: Geoffrey E. Ficken
  • Patent number: 4804623
    Abstract: Improved photographic recording materials containing an antifoggant corresponding to the formula I ##STR1## wherein the substituents have the meanings indicated in the description.
    Type: Grant
    Filed: January 7, 1987
    Date of Patent: February 14, 1989
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventor: Hans Ohlschlager
  • Patent number: 4804613
    Abstract: An optical recording medium and an optical recording process using such a medium are provided. The optical recording medium comprises a photo-polymerizable monomer having a hydrophilic group, a hydrophobic group, and at least one unsaturated bond in the molecule.
    Type: Grant
    Filed: June 9, 1987
    Date of Patent: February 14, 1989
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroshi Matsuda, Masahiro Haruta, Hirohide Munakata, Yoshinori Tomita, Takashi Hamamoto
  • Patent number: 4803149
    Abstract: A silver halide photographic material for a bright room and a process for producing the photographic material are disclosed, wherein the silver halide photographic material for a bright room comprises a support having thereon at least one silver halide emulsion layer containing silver chloride grains or silver chlorobromide grains containing at least 80 mol % silver chloride, at least one of said silver halide emulsion layer or another hydrophilic colloid layer(s) present containing a yellow dye making the silver halide photographic material substantially insensitive to visible light of 420 n.m. or more and an ultraviolet absorbent in an amount sufficient to reduce the specific sensitivity of the silver halide emulsion at 360 n.m. to 1/2 or lower than 1/2 thereof in the absence of the ultraviolet absorbent, and the .gamma. value of the silver halide photographic material being at least 10.
    Type: Grant
    Filed: October 6, 1986
    Date of Patent: February 7, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Toshiro Takahashi, Ken-ichi Kuwabara, Masahiro Okada