Patents by Inventor Arnold H. Singer

Arnold H. Singer 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).

  • Preparation of ultra-pure metal halides
    Patent number: 4965055
    Abstract: Metal halides are ultrapurified by selective complexation with a complexing gent to form a charged first complex. A ligand forms an oppositely charged second complex with metallic impurities in the metal halide to be purified. A solution containing these complexes is then passed through an ion exchange column and the desired purified metal halide collected. The present method is particularly useful in the production of ultrapure metal halides, such as zirconium fluorinate, for metallic glasses.
    Type: Grant
    Filed: March 27, 1990
    Date of Patent: October 23, 1990
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Paul E. R. Nordquist, Jr., Arnold H. Singer
  • Multiple thin film absorption of reflected substrate modes in waveguide system
    Patent number: 4372642
    Abstract: Reduction of light reflections in substrate modes. The use of absorbing multilayer thin-film light interference coatings on the backside of a LiNbO.sub.3 substrate provides an optical system which substantially reduces reflected substrate modes in integrated optical spectrum analyzers at around 8300 A wavelength, or at other selected wavelengths, over a broad range of incident angles by selection of individual film thickness and optical constants.
    Type: Grant
    Filed: November 25, 1980
    Date of Patent: February 8, 1983
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Arnold H. Singer, Ronald T. Holm