Patents by Inventor Arnold S. Epstein

Arnold S. Epstein 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).

  • Computer method and apparatus for managing data objects in a distributed context
    Patent number: 7587749
    Abstract: In a network of intermittently-connected computers, a method and apparatus for maintaining and managing control over data objects authored, accessed, and altered by users in dynamic, distributed, and collaborative contexts. The invention method and apparatus attach to each data object an identification of a respective control policy. Each control policy comprises at least an indication of a subset of the users who may access the data object, an indication of the privileges granted to each subset of users able to access the data object, and an indication of a subset of users who may define or edit the control policy. The invention method and apparatus separate the management of the control policies of data objects from the creation and use of the data objects. The invention method and apparatus automate common policy changes, distribution of policy changes to the enforcement agents, and propagation of control policies to derivative works.
    Type: Grant
    Filed: May 28, 2004
    Date of Patent: September 8, 2009
    Assignee: Liquid Machines, Inc.
    Inventors: Norbert Leser, Fajen Kyne, Robert Morgan, Christopher B. Barclay, Edward J. Gaudet, James Schoonmaker, Arnold S. Epstein, Michael D. Smith
  • Radiation-resistant integrated optical signal communicating device
    Patent number: 4021834
    Abstract: An integrated optical signal communicating device associating an optical eguide for guiding a light wave with a light-emitting junction for emitting the light wave and a light-collecting junction for receiving at least a part of the light wave. The device utilizes the gallium aluminum arsenide alloy system in the fabrication of the waveguide, emitter and collector to produce a device with high radiation resistance.
    Type: Grant
    Filed: December 31, 1975
    Date of Patent: May 3, 1977
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Arnold S. Epstein, Stewart Share, Roland A. Polimadei
  • Epitaxial deposition of III-V compounds containing isoelectronic impurities
    Patent number: 4001056
    Abstract: The disclosure herein pertains to a vapor phase process for the preparation of electroluminescent materials, particularly GaP, doped with isoelectronic impurities, particularly nitrogen, and to electroluminescent devices fabricated therefrom.
    Type: Grant
    Filed: November 11, 1974
    Date of Patent: January 4, 1977
    Assignee: Monsanto Company
    Inventors: Warren O. Groves, Arnold S. Epstein
  • Thin oxide MOS solar cells
    Patent number: 4000505
    Abstract: A semiconductor device comprising a first layer of semiconductor material ving a bulk region of p-type conductivity and an inversion surface of n-type conductivity which forms a p-n junction with said bulk region, a covering layer on said inversion surface of oxides of silicon in a thickness of about 20-50 angstroms, and metallic contacts placed over said oxide layer.
    Type: Grant
    Filed: August 8, 1975
    Date of Patent: December 28, 1976
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Arnold S. Epstein, Stewart Share
  • Gallium phosphide light-emitting diodes
    Patent number: 3931631
    Abstract: The disclosure herein pertains to a vapor phase process for the preparation of electroluminescent materials, particularly GaP, doped with isoelectronic impurities, particularly nitrogen, and to electroluminescent devices fabricated therefrom.
    Type: Grant
    Filed: April 1, 1974
    Date of Patent: January 6, 1976
    Assignee: Monsanto Company
    Inventors: Warren O. Groves, Arnold S. Epstein