Identified Sensitizer Containing Patents (Class 430/340)
  • Patent number: 4379835
    Abstract: A thermographic imaging system comprising a single layer and capable of providing a stable dark to black image upon localized heating is disclosed. The single layer comprises a polymeric binder, a combination of at least two leuco dyes, and a nitrate salt.
    Type: Grant
    Filed: December 22, 1980
    Date of Patent: April 12, 1983
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Robert D. Lowrey, Howard D. Nelson, George Van Dyke Tiers
  • Patent number: 4370401
    Abstract: An imageable layer comprising a polymeric binder, a bleachable dye or a leuco dye, a nitrate salt, and a photosensitive diazonium salt, the nitrate salt in the imageable layer being capable of liberating HNO.sub.3, NO, NO.sub.2 or N.sub.2 O.sub.4 in oxidizing amounts when the layer is heated to no more than 200.degree. C. for 60 seconds.
    Type: Grant
    Filed: October 24, 1980
    Date of Patent: January 25, 1983
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: John M. Winslow, Kenneth G. Gatzke
  • Patent number: 4368247
    Abstract: Oxoindolizine and oxoindolizinium dyes are useful in photographic materials and processes as image dyes. These dyes are formed in unexposed areas of photographic materials, especially photothermographic materials, by the reaction of a photosensitive cyclopropenone with a pyridine compound. Oxoindolizine and oxoindolizinium dyes are alternatively formed by (1) reaction of a photosensitive cyclopropenone with a pyridine compound and (2) reaction of the resulting product with a color forming coupler. The photographic material is imagewise exposed and then heated to a processing temperature to form a dye image. Alternatively, the oxoindolizine and oxoindolizinium dyes are produced by imbibing at least one of the reactants into the photographic material comprising a photosensitive cyclopropenone.
    Type: Grant
    Filed: June 29, 1981
    Date of Patent: January 11, 1983
    Assignee: Eastman Kodak Company
    Inventors: George L. Fletcher, Jr., Steven L. Bender, Donald H. Wadsworth
  • Patent number: 4347307
    Abstract: A thermally processable imaging element and method are disclosed, wherein dimensional changes after thermal processing for about 5 seconds at a temperature of about 125.degree. C., do not exceed .+-.0.03%. The imaging element features an amine-generating and an amine-responsive composition. The method features preheating the element prior to exposure to dimensionally stabilize it.
    Type: Grant
    Filed: August 3, 1981
    Date of Patent: August 31, 1982
    Assignee: Eastman Kodak Company
    Inventors: Raymond F. Limoges, Anthony A. Scribani, Robert J. Wilson
  • Patent number: 4324852
    Abstract: A radiation-sensitive element is disclosed including a radiation-sensitive layer comprised of a cobalt(III)complex and a photoreductant. A process is disclosed in which the photoreductant is converted to a reducing agent by exposure to electromagnetic radiation longer than 300 nanometers. The reducing agent is then reacted with a cobalt(III)complex. Images can be recorded directly within the radiation-sensitive layer or in a separate image-recording element or layer by use of the residual cobalt(III)complex not exposed or one or more of the reaction products produced by exposure. By using the ammonia liberated from ammine ligand containing cobalt(III)complexes on exposure in combination with imagewise and uniform exposures, positive or negative images can be formed in diazo image-recording layers or elements associated with the radiation-sensitive layer.
    Type: Grant
    Filed: June 7, 1979
    Date of Patent: April 13, 1982
    Assignee: Eastman Kodak Company
    Inventors: Anthony Adin, James C. Fleming
  • Patent number: 4320039
    Abstract: A heat-sensitive recording composition with an improved image stability comprises 3-(N-methylcyclohexylamino)-6-methyl-7-anilinofluorane, 4,4'-isopropylidenediphenol capable of color-developing the fluorane through reaction by heating, fatty acid amide as a sensitizer and water-insoluble modified phenol resin having a softening point of 80.degree. to 190.degree. C., where at least 20% by weight of N-monosubstituted fatty acid amide is contained on the basis of total fatty acid amide, and 5 to 50% by weight of the water-insoluble, modified phenol resin is contained on the basis of the 4,4'-isopropylidenediphenol.
    Type: Grant
    Filed: October 24, 1980
    Date of Patent: March 16, 1982
    Assignee: Mitsubishi Paper Mills, Ltd.
    Inventors: Sadao Morishita, Fumio Okumura, Masahiro Higuchi, Masahiro Miyauchi, Syun Kamei
  • Patent number: 4308341
    Abstract: There are disclosed an imaging composition, element and method featuring an aromatic dialdehyde that reacts with an exposure-generated amine to form a dye. The photographic speed of the reaction is improved by incorporating into the composition an imide capable of providing an ##STR1## moiety when heated.
    Type: Grant
    Filed: August 8, 1980
    Date of Patent: December 29, 1981
    Assignee: Eastman Kodak Company
    Inventor: Thap DoMinh
  • Patent number: 4308342
    Abstract: A thermally processable imaging element and method are disclosed, wherein dimensional changes after thermal processing for about 5 seconds at a temperature of about 125.degree. C., do not exceed .+-.0.03%. The imaging element features an amine-generating and an amine-responsive composition. The method features preheating the element prior to exposure to dimensionally stabilize it.
    Type: Grant
    Filed: October 31, 1980
    Date of Patent: December 29, 1981
    Assignee: Eastman Kodak Company
    Inventors: Raymond F. Limoges, Anthony A. Scribani, Robert J. Wilson
  • Patent number: 4307182
    Abstract: A radiation sensitive element comprising a substrate having coated on at least one side thereof a layer comprising a radiation sensitive tetra(aliphatic) borate salt.
    Type: Grant
    Filed: May 23, 1980
    Date of Patent: December 22, 1981
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Rex J. Dalzell, Edward J. Goettert, George V. D. Tiers
  • Patent number: 4306014
    Abstract: A photo-sensitive and heat-sensitive composition consisting essentially of a leuco-pigment; a hydrogen donator; a photo-reductant which, when exposed to a visible light, produces a reducing agent by the action of said hydrogen donator coexisting therewith; a photooxidant which, when exposed to an ultraviolet ray, causes said leuco-pigment coexisting therewith to generate color and simultaneously, when reacted with said reducing agent, is deprived of its own oxidizing ability; and a cobalt complex which reacts with the reducing agent in amplifying manner to thereby suppress the reaction of a color-forming system, and a recording element using the same.
    Type: Grant
    Filed: March 31, 1980
    Date of Patent: December 15, 1981
    Assignee: Ricoh Co., Ltd.
    Inventors: Makoto Kunikane, Akiyoshi Yasumori, Kiyoshi Taniguchi, Tetu Yamamuro
  • Patent number: 4298678
    Abstract: A photosensitive composition comprising a photooxidant, leuco dye and a substituted hydroxylamine compound of the formula R.sub.1 R.sub.2 NOH wherein R.sub.1 and R.sub.2, e.g., are alkyl, cyclic alkyl, aryl, aralkyl, alkaryl and R.sub.1 and R.sub.2 taken together form a heterocyclic ring of 5 to 7 carbon atoms. Optionally monomers and polymeric binders can be present. The compositions are useful for photoimaging and in solvent and aqueous developable resist-forming films.
    Type: Grant
    Filed: August 14, 1980
    Date of Patent: November 3, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Mark R. McKeever
  • Patent number: 4292399
    Abstract: There is disclosed an image-forming composition and element comprising a cobalt(III) complex, a reducing agent precursor which, in the presence of reduction products of the complex, forms a reducing agent for the complex, and an organic oxidizing agent to improve the image properties of the composition.
    Type: Grant
    Filed: October 22, 1979
    Date of Patent: September 29, 1981
    Assignee: Eastman Kodak Company
    Inventor: Anthony Adin
  • Patent number: 4288531
    Abstract: An imaging element which relies upon an aromatic dialdehyde to produce a dye provides improved maximum neutral densities when certain polymers are superimposed over the element. Such polymers seal the element to reduce loss of the dialdehyde during development. An imaging method is also disclosed.
    Type: Grant
    Filed: September 26, 1979
    Date of Patent: September 8, 1981
    Assignee: Eastman Kodak Company
    Inventors: Anthony Adin, Richard C. Sutton, Joseph A. Verdone
  • Patent number: 4284704
    Abstract: Imaging means, such as a tetrazolium salt, capable of reduction to form a visible image is present in a radiation-sensitive layer in combination with a photoreductant incorporating one or more labile hydrogen atoms and capable of producing a reducing agent precursor in radiation-struck areas of the layer. An image is produced in the layer by processing the layer after imagewise exposure to actinic radiation.
    Type: Grant
    Filed: September 29, 1978
    Date of Patent: August 18, 1981
    Assignee: Eastman Kodak Company
    Inventors: James C. Fleming, Joseph W. Manthey, Ralph T. Brongo
  • Patent number: 4245027
    Abstract: A light-sensitive image recording material comprising, as a self-supporting film or in one or more layers on a support, at least(a) a heat sensitive coloring element comprising at least one polyvinyl pyridine and at least one polyvinylidene halide, and(b) a light sensitizing element comprising at least one of(1) a compound which, on exposure to actinic radiation, is capable of complexing the polyvinyl pyridine of element (a) or is capable of forming a quaternary salt with the polyvinyl pyridine of element (a), or(2) a compound which, on exposure to actinic radiation, is capable of releasing a precursor which is capable of complexing the polyvinyl pyridine of element (a) or is capable of forming a quaternary salt with the polyvinyl pyridine of element (a) under heating,and a dry process for recording a light image comprising(1) imagewise exposing to actinic radiation the light-sensitive image recording material described above, and(2) uniformly heating the imagewise exposed light-sensitive image recording mate
    Type: Grant
    Filed: July 11, 1978
    Date of Patent: January 13, 1981
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Keiji Takeda, Masayoshi Nagata, Kenji Matsumoto
  • Patent number: 4205988
    Abstract: Photochromic method utilizing photochromic compositions in which the intensity of color generation is not proportional to light intensity which are produced by incorporating an aromatic amine with a low ionization potential, up to 7.6 EV so that it can be ionized by biphotonic absorption into a stabilizing polymer matrix.
    Type: Grant
    Filed: April 30, 1979
    Date of Patent: June 3, 1980
    Assignee: Asahi Kasei K. K.
    Inventors: Masaru Ozaki, Koichi Mori, Masatsugu Yoshino