Patents Examined by J. Travis Brown
  • Photographic light-sensitive materials
    Patent number: 4418141
    Abstract: A photographic light-sensitive material having improved antistatic properties is described, comprising a plastic support, at least one photographic light-sensitive emulsion layer on one side of the support, and an antistatic layer on the other side of the support, wherein the antistatic layer contains fine particles of at least one crystalline metal oxide selected from ZnO, TiO.sub.2, SnO.sub.2, Al.sub.2 O.sub.3, In.sub.2 O.sub.3, SiO.sub.2, MgO, BaO, and MoO.sub.3, or a composite oxide thereof.
    Type: Grant
    Filed: December 22, 1981
    Date of Patent: November 29, 1983
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hideo Kawaguchi, Takayuki Inayama
  • Film units containing thermally induced water-releasing benzotriazole complex
    Patent number: 4418139
    Abstract: Solid compositions are disclosed comprising a complex of water; a benzotriazole of the formula ##STR1## wherein R.sup.1 and R.sup.2 are independently hydrogen, a monovalent organic radical, halogen, or nitro; and at least one water-soluble base having a basicity greater than that of the benzotriazole and capable of dissociating to provide an anion and a monovalent or divalent metal cation. The compositions have melting ranges above 35.degree. C. and are capable of releasing a substantial portion of the water contained therein to the surrounding environment when melted. The compositions can be employed in thermally developable photographic film units as thermally induced water-releasing materials which provide water to the internal environment of the film unit when the film unit is heated sufficiently to melt the composition.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: November 29, 1983
    Assignee: Polaroid Corporation
    Inventors: Howard G. Rogers, Robert D. Eckert, Ronald A. Sahatjian, Robert A. Sulesky
  • Process for the development of color photographic light-sensitive material
    Patent number: 4418140
    Abstract: A process for the development of color photographic light-sensitive material is described. The process comprises color developing an exposed light-sensitive material in the presence of a compound of the general formula: ##STR1## wherein M is a hydrogen atom, an alkali metal atom, NH.sub.4 or a protective group for the mercapto group which undergoes cleavage by the action of an alkali; R is a hydrogen atom or an alkyl group containing 1 to 3 carbon atoms; and R' is a hydrogen atom or an alkyl group containing 1 to 3 carbon atoms. This process prevents the formation of color development fog without seriously reducing sensitivity.
    Type: Grant
    Filed: April 8, 1982
    Date of Patent: November 29, 1983
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hiroyuki Mifune, Shoji Ishiguro, Tadao Shishido, Tatsuo Nishimura
  • Silver halide color photographic light-sensitive material
    Patent number: 4416978
    Abstract: A silver halide color photographic light-sensitive material containing a magenta color image forming polymer coupler latex and at least one compound represented by the following general formula (I) ##STR1## wherein R represents an alkyl group, an alkenyl group, an aryl group, a heterocyclic group, a R.sub.4 CO-- group, a R.sub.5 SO.sub.2 -- group or a R.sub.6 NHCO-- group; R.sub.1 and R.sub.2, which may be the same or different, each represents a hydrogen atom, a halogen atom, an alkyl group, an alkenyl group, an alkoxy group or an alkenoxy group; R.sub.3 represents a hydrogen atom, an alkyl group, an alkenyl group or an aryl group; and R.sub.4, R.sub.5 and R.sub.6 each represents an alkyl group, an alkenyl group, an aryl group or a heterocyclic group.
    Type: Grant
    Filed: June 10, 1982
    Date of Patent: November 22, 1983
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masakazu Morigaki, Morio Yagihara, Takashi Ozawa
  • Aqueous processable, positive-working photopolymer compositions
    Patent number: 4415652
    Abstract: Three-component aqueous processable, positive-working photopolymer compositions comprising (i) an unsaturated polymer comprising (a) about 20 to 1000 milliequivalents of reactive unsaturated carbon to carbon groups per 100 g of polyene and (b) about 10 to 50 mol percent of N-alkenylmaleimide units; (ii) a reactive mercapto acid and (iii) a radiation-sensitive, radical-generating initiator; substrates coated with such compositions; and a photoimaging process.
    Type: Grant
    Filed: July 27, 1982
    Date of Patent: November 15, 1983
    Assignee: E. I. Du Pont de Nemours & Co.
    Inventor: Stephen Proskow
  • Aqueous processable, positive-working photopolymer compositions
    Patent number: 4415651
    Abstract: Three-component aqueous processable, positive-working photopolymer compositions comprising (i) an unsaturated polymer, (ii) a reactive mercapto acid and (iii) a radiation-sensitive, radical-generating initiator; substrates coated with such compositions; and a photoimaging process.
    Type: Grant
    Filed: January 4, 1982
    Date of Patent: November 15, 1983
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Stephen Proskow
  • Image-forming method
    Patent number: 4414305
    Abstract: An image-forming method is disclosed. The method includes providing a silver halide color photographic material and imagewise exposing that material. The exposed material is color developed in the presence of a compound capable of reacting with or adsorbing a silver halide. The material is developed within a mono-bath intensifying developing solution which includes hydrogen peroxide or a compound capable of releasing hydrogen peroxide and a color developing agent. The solution substantially excludes the presence of bromide ions and iodide ions. The compound capable of reacting with or being absorbed into silver halide is a nitrogen-containing heterocyclic compound which has been found to be very useful in the image-forming method to obtain high color density with materials containing a small amount of silver halide.
    Type: Grant
    Filed: July 28, 1982
    Date of Patent: November 8, 1983
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Koichi Nakamura, Hiroyuki Hirai
  • Photographic recording material containing an aldehyde remover
    Patent number: 4414309
    Abstract: Compounds corresponding to the following general formula ##STR1## wherein R.sup.1 represents hydrogen, an aliphatic or cycloaliphatic group, an aralkyl group, an aryl group, a heterocyclic group or one of the following groups: --CO--alkyl, --CO--aryl, --CO--heterocyclic group, --SO.sub.2 --alkyl, --SO.sub.2 --aryl, --CO--O--alkyl, --CO--NH--NH.sub.2, ##STR2## and R.sup.2 represents hydrogen, an aliphatic or cycloaliphatic group, an aralkyl group, an aryl group, alkoxy, aroxy, carboxyl, carbamoyl, alkoxycarbonyl, an alkyl or aryl group attached through a carbonyl group, cyanogen, an amino group optionally substituted by alkyl, aralkyl, aryl or acyl, or a cyclic amino groupmay be used as additives in the layers of color photographic recording materials to improve the stability of color couplers, in particular magenta couplers, against formaldehyde.
    Type: Grant
    Filed: November 24, 1982
    Date of Patent: November 8, 1983
    Assignee: Agfa-Gavaert Aktiengesellschaft
    Inventors: Hans Langen, Lothar Rosenhahn, Erich Wolff
  • Silver halide color photographic photosensitive material
    Patent number: 4414308
    Abstract: In a silver halide color photographic photosensitive material, having a red, a green and a blue light-sensitive emulsion layer on a support, each emulsion containing a nondiffusible image forming coupler, improvement is attained by providing a layer structure in which at least one of the red, the green and the blue light-sensitive emulsion layer is separated into a high sensitivity silver halide emulsion layer and a low sensitivity silver halide emulsion layer, both layers having photosensitive regions in substantially the same spectral region, by an intermediate layer and incorporating at least one kind of DIR compounds represented by formula (I) defined in the specification in at least one layer of the high sensitivity silver halide emulsion layer, the low sensitivity silver halide emulsion and the intermediate layer.
    Type: Grant
    Filed: March 16, 1982
    Date of Patent: November 8, 1983
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventor: Fumio Hamada
  • Silver halide color photosensitive materials
    Patent number: 4413054
    Abstract: A silver halide color photosensitive material is described, containing a 4-arylthio-5-pyrazolone coupler and comprising a layer containing an emulsion of fine silver halide particles.
    Type: Grant
    Filed: March 30, 1982
    Date of Patent: November 1, 1983
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Akio Mitsui, Kotaro Nakamura
  • Desensitizer compositions
    Patent number: 4411700
    Abstract: A desensitizer composition containing an imidazole derivative shown by the following general formula (I) ##STR1## wherein R.sub.1 is a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, or an aryl group having 6 to 20 carbon atoms; R.sub.2 is a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, an amino group, or an alkylthio group having 1 to 20 carbon atoms; R.sub.3 and R.sub.4 each is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an aryl group having 6 to 20 carbon atoms; and R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each may be substituted, can be effectively used for partially desensitizing a developer sheet of pressure-sensitive copying papers, particularly where diphenylamine series color formers are used.
    Type: Grant
    Filed: October 16, 1981
    Date of Patent: October 25, 1983
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuyoshi Sekikawa, Ken Iwakura, Akio Miyamoto, Masato Satomura
  • Silver halide color photographic light-sensitive material
    Patent number: 4411987
    Abstract: A silver halide color photographic light-sensitive material containing an unsubstituted or substituted glycoluril as an aldehyde gas scavenger. The silver halide color photographic light-sensitive material of the present invention can avoid the decrease in color density and the formation of fog normally present when the silver halide color photographic light-sensitive material is stored for a long period of time in contact with formaldehyde gas. In addition, the silver halide color photographic light-sensitive material of the present invention has a reduced layer thickness and good film strength.
    Type: Grant
    Filed: November 8, 1982
    Date of Patent: October 25, 1983
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hidetoshi Kobayashi, Toshiyuki Watanabe, Keiichi Adachi, Tadashi Ogawa
  • Desensitizer compositions
    Patent number: 4411699
    Abstract: A desensitizer composition containing the amidine derivative shown by following general formula can be effectively used for partially desensitizing a developer sheet of pressure-sensitive copying papers using diphenylamine series color formers: ##STR1## wherein R.sub.1 is a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, or an aryl group having 6 to 20 carbon atoms; R.sub.2 is a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, an amino group, or an alkylthio group having 1 to 20 carbon atoms; and n is an integer of 2 to 6; said R.sub.1 and R.sub.2 may have a substituent and when both R.sub.1 and R.sub.2 are an alkyl group, at least one of R.sub.1 and R.sub.2 is an alkyl group having a substituent.
    Type: Grant
    Filed: October 16, 1981
    Date of Patent: October 25, 1983
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Ken Iwakura, Nobuyoshi Sekikawa, Akio Miyamoto
  • Process and equipment for enlargement of color-balanced prints in additive system
    Patent number: 4410613
    Abstract: The invention relates to a process and an equipment for making color enlaments in additive method, where the device can be fitted onto the traditional enlargers. By using the solution according to the invention the arrangement of the additive color filters under the lens of the enlarger can be solved in a stable but not containing manner, simultaneously ensuring easy and alternating actuating and integration of the colors of the negative. By means of the comparative process, by using the color-analyzer mask and the properly dark colored reference standards belong to the equipment, the color and density balance of the prints to be enlarged can be adjusted by the way of one single trial development, independent of the individual subjective color perceptional ability.
    Type: Grant
    Filed: September 14, 1981
    Date of Patent: October 18, 1983
    Assignee: Ofotert Optikai Finommechanikai es Fotocikkeket Ertekesito Vallalat
    Inventor: Miklos Soskuthy
  • Method of dispersing oil soluble photographic additives
    Patent number: 4410624
    Abstract: The invention relates to a process of dispersing oil-soluble photographic additives having a silver-halide base for information recording materials.According to the invention, compounds of the following general formula: ##STR1## are used as auxiliary dispersing agents. The symbolsR represents hydrogen, alkyl with 1 to 8 C atoms,M represents hydrogen, alkali metal, ammonium, andX represents OR or SO.sub.3 M.
    Type: Grant
    Filed: March 26, 1982
    Date of Patent: October 18, 1983
    Assignee: VEB Filmfabrik Wolfen
    Inventors: Dieter Plaschnick, Christoph Roth, Bernd Noll, Walter Kroha, Lothar Kuhnert
  • Silver halide photosensitive material
    Patent number: 4409322
    Abstract: A silver halide photographic material comprising a silver halide emulsion layer and a protective layer on one side of the support and a non-photosensitive back layer on the other side of the support. The amount of silver halide in the emulsion layer is not more than 30 mg/dm.sup.2. A matting agent in indeterminate form is included in the protective layer and a substantially spherical matting agent is included in the back layer.
    Type: Grant
    Filed: December 10, 1981
    Date of Patent: October 11, 1983
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Atsuo Ezaki, Takeshi Murakami
  • Method of preparing a phosphor suspension
    Patent number: 4409306
    Abstract: Method of preparing a phosphor suspension by mixing a photosensitive material, a photosensitizer, and a phosphor for the purpose of forming a photosensitive film. The photosensitizer in the suspension is a chromic-acid solution.With such a phosphor suspension, a firmly adhering, uniform and compact phosphor film can be formed on the screen substrate. In addition, the phosphor areas obtained by this method have very sharp boundaries.
    Type: Grant
    Filed: March 2, 1982
    Date of Patent: October 11, 1983
    Assignee: International Standard Electric Corporation
    Inventors: Volker Gerstle, Gerhard Mauz, Rolf Zondler
  • Method for the reproduction of color image
    Patent number: 4409321
    Abstract: A method for reproducing a color image. A dye image is formed on a photographic light-sensitive material by imagewisely exposing the material and processing to form a dye image. Through the imaged photographic light-sensitive material, an exposure is made on a photographic printing light-sensitive material which is processed in an alkaline activator solution to form a dye image thereon. The photographic light-sensitive material contains a transparent support provided thereon with red-sensitive, green-sensitive, and blue-sensitive silver halide emulsion layers. The layers each contain one of three different nondiffusible couplers capable of forming, by coupling, compounds having spectral absorption maximum wavelength in the wavelength region longer than 340 nm. The spectral absorption maximum wavelength of the compounds differ by at least 30 nm.
    Type: Grant
    Filed: January 22, 1982
    Date of Patent: October 11, 1983
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Kaoru Onodera, Toshifumi Iijima, Wataru Fujimastu
  • Silver halide photographic material
    Patent number: 4409323
    Abstract: A silver halide photographic material containing a coupler capable of releasing a photographically useful group in a controllable timing.
    Type: Grant
    Filed: February 13, 1981
    Date of Patent: October 11, 1983
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Ryosuke Sato, Yuji Hotta, Katsumi Matsuura
  • Multilayer color photographic light-sensitive materials
    Patent number: 4409324
    Abstract: A multilayer color photographic sensitive material is disclosed. The material is comprised of a support base and a silver halide emulsion layer. The material contains at least one layer containing a high boiling solvent and an oil-soluble coupler, wherein the volume ratio of solvent to coupler is 1/2 or less, and a compound represented by the general formula (I): ##STR1## wherein X is a hydrogen atom or an acetyl group, R is an aryl group, and R.sub.1, R.sub.2, R.sub.3 and R.sub.4, which may be the same or different, each represents a hydrogen atom, an alkyl group or an aryl group. The material produces sharp images even though it contains a low oil/coupler ratio. Furthermore, there is no retardation of development.
    Type: Grant
    Filed: September 21, 1982
    Date of Patent: October 11, 1983
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takatoshi Ishikawa, Akio Mitsui, Masakazu Morigaki, Takashi Nakamura