Patents by Inventor Robert A. Lieberman

Robert A. Lieberman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5053554
    Abstract: Radiation curable compositions containing outstanding reactive diluents have been developed. The diluents are lower alkyl ether acrylates and methacrylates of particular alkoxylated and non-alkoxylated polyols.Examples are mono-methoxy trimethylolpropane diacrylate, mono-methoxy neopentyl glycol monoacrylate and mono-methoxy, ethoxylated neopentyl glycol monoacrylate having an average of about two moles of ethylene oxide.
    Type: Grant
    Filed: January 30, 1990
    Date of Patent: October 1, 1991
    Assignee: Diamond Shamrock Chemical Company
    Inventors: Francis A. Higbie, Robert A. LieBerman, Ira M. Rose
  • Patent number: 4952014
    Abstract: An optical system, useful as a magnetometer and as a polarization contoller, is disclosed. The system includes a source of electromagnetic radiation, a detector of electromagnetic radiation, and a magnetizable medium via which the source and detector communicate with one another. The system further includes apparatus for forming at least two adjacent magnetic domains separated by at least one domain wall.
    Type: Grant
    Filed: April 17, 1989
    Date of Patent: August 28, 1990
    Assignee: AT&T Bell Laboratories
    Inventors: Robert A. Lieberman, Raymond Wolfe
  • Patent number: 4876384
    Abstract: Radiation curable compositions containing outstanding reactive diluents have been developed. The diluents are lower alkyl ether acrylates and methacrylates of particular alkoxylated and non-alkoxylated polyols.Examples are mono-methoxy trimethylolpropane diacrylate, mono-methoxy neopentyl glycol monoacrylate and mono-methoxy, ethoxylated neopentyl glycol monoacrylate having an average of about two moles of ethylene oxide.
    Type: Grant
    Filed: April 8, 1986
    Date of Patent: October 24, 1989
    Assignee: Diamond Shamrock Chemicals Co.
    Inventors: Francis A. Higbie, Robert A. LieBerman, Ira M. Rose
  • Patent number: 4834496
    Abstract: Distributed region optical sensors for chemical detection are provided by utilizing optical fiber technology. A core is provided with a surrounding region that is permeable to the chemical to be detected. A composition whose optical characteristics are altered upon interaction with the chemical to be detected is provided within the permeable material. This change in optical characteristics allows chemical detection through detection of light guided by the fiber.
    Type: Grant
    Filed: May 22, 1987
    Date of Patent: May 30, 1989
    Assignee: American Telephone and Telegraph Company, AT&T Bell Laboratories
    Inventors: Lee L. Blyler, Jr., Leonard G. Cohen, Robert A. Lieberman, John B. MacChesney
  • Patent number: 4709413
    Abstract: A bidirectional fiber optic system is described in which at one terminal the output radiation of a light source (LED or semiconductor laser) is coupled through a small diameter hole in the active area of a photodiode into the core of a larger diameter transmission fiber. On the other hand, radiation propagating through the fiber in the opposite direction exits from the fiber with a large numerical aperture so that most of it is incident on the active area of the photodiode and little is lost through the hole. Also described are a number of photodiode configurations for use in such a system, as well as dual photodiodes to perform both signal detection and output monitoring functions. Further described are fiber optic sensing systems for monitoring such variables as blood pressure.
    Type: Grant
    Filed: June 13, 1985
    Date of Patent: November 24, 1987
    Assignee: American Telephone and Telegraph Company, AT&T Bell Laboratories
    Inventors: Stephen R. Forrest, Robert A. Lieberman, Richard L. Panock
  • Patent number: 4617608
    Abstract: A variable gap device which comprises a suitable material with a cavity formed therein mounted over a body. Elements are formed on the surface of the body and on the top surface of the cavity. In one embodiment, the elements are electrodes of a variable capacitance device, and in another embodiment the elements are partial or total reflectors of incident light from an optical fiber. The surface of the cavity opposite the body is preferably flat and of the order of microns from the body.The device is fabricated by forming a removable layer over a temporary substrate. An appropriate element pattern is formed over the removable layer and the layer is etched in a configuration which will define the cavity. The deformable material is encapsulated over this structure and then removed from the substrate with the element remaining in the cavity. Any removable material remaining in the cavity can then be etched away.
    Type: Grant
    Filed: June 13, 1985
    Date of Patent: October 14, 1986
    Assignee: AT&T Bell Laboratories
    Inventors: Greg E. Blonder, Angelo A. Lamola, Robert A. Lieberman
  • Patent number: 4417023
    Abstract: Flatting agents, such as silica, talc and carbonates are present in radiation hardenable compositions in order to reduce gloss and obtain a flat appearance in cured coating. However, the flatting agent settles in the radiation-hardenable composition. To reduce settling of the flatting agent, one or more stabilizers are added to the composition. Useful stabilizers are alkylene oxide adducts of particular siloxane copolymers.
    Type: Grant
    Filed: February 10, 1982
    Date of Patent: November 22, 1983
    Assignee: Diamond Shamrock Corporation
    Inventors: Joseph V. Sinka, Robert A. LieBerman
  • Patent number: 4382135
    Abstract: Radiation curable diluents have been developed which are acrylic acid esters of alkoxylated 1,6-hexanediol, neopentyl glycol and tripropylene glycol, each having a relatively low degree of alkoxylation. Examples are diacrylates of adducts of neopentyl glycol with two moles, four moles and six moles, respectively, of ethylene oxide and with two moles and four moles, respectively, of propylene oxide.
    Type: Grant
    Filed: April 1, 1981
    Date of Patent: May 3, 1983
    Assignee: Diamond Shamrock Corporation
    Inventors: Joseph V. Sinka, Francis A. Higbie, Robert A. LieBerman
  • Patent number: RE33651
    Abstract: A variable gap device which comprises a suitable material with a cavity formed therein mounted over a body. Elements are formed on the surface of the body and on the top surface of the cavity. In one embodiment, the elements are electrodes of a variable capacitance device, and in another embodiment the elements are partial or total reflectors of incident light from an optical fiber. The surface of the cavity opposite the body is preferably flat and of the order of microns from the body.The device is fabricated by forming a removable layer over a temporary substrate. An appropriate element pattern is formed over the removable layer and the layer is etched in a configuration which will define the cavity. The deformable material is encapsulated over this structure and then removed from the substrate with the element remaining in the cavity. Any removable material remaining in the cavity can then be etched away.
    Type: Grant
    Filed: October 11, 1988
    Date of Patent: July 30, 1991
    Assignee: AT&T Bell Laboratories
    Inventors: Greg E. Blonder, Angelo A. Lamola, Robert A. Lieberman