Patents by Inventor Albert Anthony Ballman

Albert Anthony Ballman 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).

  • Process for producing lithium niobate and lithium tantalate
    Patent number: 4108970
    Abstract: A process is described for producing fine particles of certain double oxide compounds. This procedure is advantageous because of the fine particles produced and the accurate stoichiometry of the resulting product. The process is particularly applicable to the production of such compounds as LiNbO.sub.3 and LiTaO.sub.3 and other compounds where conventional procedures involving heating a mixture of individual oxides leads to stoichiometry problems because of the volatility of one of the component oxides.
    Type: Grant
    Filed: July 21, 1976
    Date of Patent: August 22, 1978
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Albert Anthony Ballman, Murray Robbins
  • Technique for growth of thin film lithium niobate by liquid phase epitaxy
    Patent number: 3998687
    Abstract: A liquid phase epitaxial growth technique for growing lithium niobate films on lithium tantalate substrates involves growth from a flux system based on either lithium borate, lithium tungstate, tungsten oxide or potassium tungstate. Optical waveguiding occurs in films grown from the described flux systems.
    Type: Grant
    Filed: March 10, 1975
    Date of Patent: December 21, 1976
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Albert Anthony Ballman, Ping King Tien