Patents Represented by Attorney Birgit E. Morris

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  • Organic volume phase holographic recording medium
    Patent number: 4049459
    Abstract: Holographic recording media which form permanent holograms with excellent recording sensitivity are prepared from .alpha.-diketones which are capable of intermolecular hydrogen atom abstraction dissolved in a transparent, cured vinyl benzene polyester polymerhost.
    Type: Grant
    Filed: February 26, 1976
    Date of Patent: September 20, 1977
    Assignee: RCA Corporation
    Inventors: Allen Bloom, Robert Alfred Bartolini
  • Method of transferring a surface relief pattern from a poly(olefin sulfone) layer to a metal layer
    Patent number: 4045318
    Abstract: This invention pertains to a method of transferring a surface relief pattern from a poly(olefin sulfone) layer to a metal layer wherein the poly(olefin sulfone) layer is exposed to ultra violet radiation prior to sputter etching the surface relief pattern into the metal layer.
    Type: Grant
    Filed: July 30, 1976
    Date of Patent: August 30, 1977
    Assignee: RCA Corporation
    Inventors: Richard Joseph Himics, Nitin Vithalbhai Desai, Eugene Samuel Poliniak
  • Temperature-stable non-magnetic alloy
    Patent number: 4042382
    Abstract: An alloy composed of nickel, boron and phosphorus that does not change substantially in magnetic properties, hardness or resistivity, with substantial changes in temperature.
    Type: Grant
    Filed: January 23, 1976
    Date of Patent: August 16, 1977
    Assignee: RCA Corporation
    Inventor: Nathan Feldstein
  • Liquid crystal devices having diode characteristics
    Patent number: 4042293
    Abstract: The device comprises an enclosure including two spaced apart electrodes for applying an electric field through a film of liquid crystal material between the electrodes. Disposed on one of the electrodes, between it and the liquid crystal film, is a semiconductor material layer. The semiconductor layer has a rectifying or non-ohmic contact with the liquid crystal film, and has an ohmic or low resistance contact with the electrode. The layer has a resistance, when the rectifying contact is reverse biased, greater than that of the liquid crystal film, and, when the rectifying contact is forward biased, less than that of the film.
    Type: Grant
    Filed: July 14, 1975
    Date of Patent: August 16, 1977
    Assignee: RCA Corporation
    Inventors: Joseph John Hanak, Ronald Norman Friel, Lawrence Alan Goodman
  • Certain alkali metal-rare earth metaphosphate photoluminescent glasses
    Patent number: 4038203
    Abstract: High intensity photoluminescent glasses comprising certain alkali metal-rare earth metaphosphates are suitable for use in display panels, indicator lights, and decorative illumination, etc. These glasses, with a suitable activator, have the formula:[n{(1-x)M.sub.2 0.2xQ.P.sub.2 O.sub.5 }][1-y)Y.sub.2 O.sub.3.yR.sub.2 O.sub.3.3P.sub.2 O.sub.5 ]where n is from two to siz, x is from 0 to 0.2 and y is from 0 to 1; M is an alkali metal; Q is a thallium or silver activator and R is at least one of europium and terbium.
    Type: Grant
    Filed: May 21, 1976
    Date of Patent: July 26, 1977
    Assignee: RCA Corporation
    Inventor: Tatsuo Takahashi
  • Electroless copper plating bath
    Patent number: 4036651
    Abstract: An electroless copper plating bath comprising a copper salt, a chelating agent, an alkali pH adjusting agent, formaldehyde, and sodium hypophosphite as a plating rate accelerator.
    Type: Grant
    Filed: February 26, 1974
    Date of Patent: July 19, 1977
    Assignee: RCA Corporation
    Inventor: Joel Alan Weiner
  • Method of making optical waveguides and product by the process
    Patent number: 4037005
    Abstract: An optical waveguide of niobium-doped lithium tantalate single crystal has excellent low loss waveguiding properties with strong electro-optic behavior. The waveguides are made by depositing a film of niobium on a polished lithium tantalate crystal, annealing the crystal so as to diffuse the niobium into the crystal and cooling the crystal.
    Type: Grant
    Filed: March 6, 1975
    Date of Patent: July 19, 1977
    Assignee: RCA Corporation
    Inventor: William Phillips
  • Method of improving the sensitivity of organic volume phase holographic recording media
    Patent number: 4032340
    Abstract: The sensitivity of organic volume phase holographic recording media comprising an .alpha.-diketone in an acrylic polyester polymer can be improved by heating the recording media during or after recording.
    Type: Grant
    Filed: April 10, 1975
    Date of Patent: June 28, 1977
    Assignee: RCA Corporation
    Inventors: Allen Bloom, Robert Alfred Bartolini, Herbert Alfred Weakliem
  • Holographic recording medium employing a photoconductive layer and a low molecular weight microcrystalline polymeric layer
    Patent number: 4032338
    Abstract: A holographic recording medium comprising a conductive substrate, a photoconductive layer and an electrically alterable layer of a linear, low molecular weight hydrocarbon polymer has improved fatigue resistance. An acrylic barrier layer can be interposed between the photoconductive and electrically alterable layers.
    Type: Grant
    Filed: October 8, 1975
    Date of Patent: June 28, 1977
    Assignee: RCA Corporation
    Inventor: Robert Allen Gange
  • Method of preparing improved magnetic head material
    Patent number: 4029501
    Abstract: A method of forming hardened magnetic transducer material for use in record playback heads whereby a thin encapsulating firm of oxide is formed in aqueous basic sodium chlorate solution about finely divided particles of a magnetic alloy of iron, silicon and aluminum. The encapsulated particles are then hot pressed to form improved magnetic transducer material.
    Type: Grant
    Filed: January 26, 1976
    Date of Patent: June 14, 1977
    Assignee: RCA Corporation
    Inventor: Herbert Irwin Moss
  • Novel liquid crystal compounds and electro-optic devices incorporating them
    Patent number: 4029595
    Abstract: Liquid crystal compounds of the formula ##STR1## wherein X can be an alkoxy (RO-), an acyloxy ##STR2## or an alkylcarbonato ##STR3## group wherein R is an alkyl group having up to 10 carbon atoms and Y is a nitro or cyano group, having positive dielectric anisotropy and are useful in electro-optic devices which comprise a thin liquid crystal layer between two closely spaced parallel electrodes.
    Type: Grant
    Filed: September 17, 1976
    Date of Patent: June 14, 1977
    Assignee: RCA Corporation
    Inventors: Daniel Louis Ross, Dragan Milan Gavrilovic
  • Novel liquid crystal compounds and electro-optic devices incorporating them
    Patent number: 4029594
    Abstract: Liquid crystal compounds of the formula ##STR1## wherein X can be alkyl (R-), alkoxy (RO-), acyloxy ##STR2## or alkylcarbonato ##STR3## wherein R is an alkyl group from 1-10 carbon atoms, and R.sub.1 -R.sub.3 can be hydrogen, methyl or halogen with the proviso that at least one and no more than two of R.sub.1 -R.sub.3 are substituents other than hydrogen, have positive dielectric anisotropy and are useful in electro-optic devices which comprise a thin liquid crystal layer between two closely spaced parallel electrodes.
    Type: Grant
    Filed: June 17, 1976
    Date of Patent: June 14, 1977
    Assignee: RCA Corporation
    Inventors: Dragan Milan Gavrilovic, Daniel Louis Ross
  • Method of purifying 2,4-bis(6-diazo-5,6-dihydro-5-oxo-1-naphthalenesulfonyloxy benzophenone)
    Patent number: 4024122
    Abstract: A method of purifying crude 2,4-bis(6-diazo-5,6-dihydro-5-oxo-1-naphthalenesulfonyloxy)benzophenone by dissolving in an organic solvent, reprecipitating by adding certain nonsolvents and recrystallizing the reprecipitated product from certain solvents.
    Type: Grant
    Filed: September 11, 1974
    Date of Patent: May 17, 1977
    Assignee: RCA Corporation
    Inventors: Daniel Louis Ross, Lucian Anthony Barton
  • Method for desensitizing recorded organic volume phase holographic recording media
    Patent number: 4022618
    Abstract: Organic volume phase holographic recording medium comprising an .alpha.-diketone in an acrylic polyester polymer is desensitized by exposing the medium to desensitizing light after recording is complete. This inactivates the .alpha.-diketone and prevents damage to the medium during readout.
    Type: Grant
    Filed: April 10, 1975
    Date of Patent: May 10, 1977
    Assignee: RCA Corporation
    Inventors: Robert Alfred Bartolini, William Joseph Burke, Allen Bloom
  • Ablative optical recording medium
    Patent number: 4023185
    Abstract: An ablative recording medium comprises a substrate coated with a light reflecting coating which in turn is coated with a light absorptive layer of 4-phenylazo-1-naphthylamine formed by evaporation of Sudan Black B dyestuff. During recording, portions of the organic coating are ablated, or vaporized, by a modulated focussed light beam, thereby exposing portions of the reflective layer and recording video information as a reflective-antireflective pattern.
    Type: Grant
    Filed: March 19, 1976
    Date of Patent: May 10, 1977
    Assignee: RCA Corporation
    Inventors: Allen Bloom, Robert Alfred Bartolini, Alan Edward Bell
  • Method of making a metallized video disc having an insulating layer thereon
    Patent number: 4018945
    Abstract: A polymeric film applied to a video disc by glow discharge techniques is treated with a subsequent glow discharge in air to improve wear properties.
    Type: Grant
    Filed: June 19, 1975
    Date of Patent: April 19, 1977
    Assignee: RCA Corporation
    Inventor: Robert Michael Mehalso
  • Electron beam recording comprising polymer of 1-methylvinyl methyl ketone
    Patent number: 4018937
    Abstract: Recording medium comprising a film of a polymer of 1-methylvinyl methyl ketone on a support is suitable for recording information with electron beams. This recording medium has high resolution and good sensitivity.
    Type: Grant
    Filed: August 14, 1975
    Date of Patent: April 19, 1977
    Assignee: RCA Corporation
    Inventors: Aaron William Levine, Michael Kaplan
  • Liquid crystal module
    Patent number: 4012117
    Abstract: The module comprises a carrier on which a semiconductor chip is mounted, and a plurality of terminals to which various outputs of the chip are electrically connected, the terminals comprising metallized areas on one surface of the carrier. A liquid crystal cell is mounted within a frame including means for securing the frame to the carrier, resilient connector means being clamped between the liquid crystal cell and the carrier for electrically connecting different ones of the carrier terminals to different ones of electrodes of the cell.
    Type: Grant
    Filed: July 29, 1974
    Date of Patent: March 15, 1977
    Assignee: RCA Corporation
    Inventor: Angelo Gino Lazzery
  • Olefin-SO.sub.2 copolymer film adhesion to a substrate
    Patent number: 4007295
    Abstract: To improve the adherence of an olefin-SO.sub.2 copolymer film employed as an electron beam resist to a metallic substrate, a thin film of gold is first applied to the substrate. The resulting bond is strong enough to withstand exposure to electron beams, development of the resist film and electroplating of the film witout undercutting, lifting or distortion of the film.
    Type: Grant
    Filed: July 28, 1975
    Date of Patent: February 8, 1977
    Assignee: RCA Corporation
    Inventors: Eugene Samuel Poliniak, Richard Joseph Himics, Henry Wielicki
  • Method of recording information in which the electron beam sensitive material contains 4,4'-bis(3-diazo-3-4-oxo-1-naphthalene sulfonyloxy)benzil
    Patent number: 4005437
    Abstract: Recording media comprising a mixture of 4,4'-bis(3-diazo-3,4-dihydro-4-oxo-1-naphthalenesulfonyloxy)benzil and an alkali soluble resin are suitable for recording information with electron beams. These recording media have high sensitivity, high resolving power and can be reproducibly formulated.
    Type: Grant
    Filed: April 18, 1975
    Date of Patent: January 25, 1977
    Assignee: RCA Corporation
    Inventors: Daniel Louis Ross, Lucian Anthony Barton