Patents by Inventor Albert M. Stewart

Albert M. Stewart 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).

  • Crystals for ultraviolet light filters
    Patent number: 5837054
    Abstract: Crystals formed of a solid-solution of NiSiF.sub.6 6H.sub.2 O provide very good materials for filtering ultraviolet light and will not deteriorate in temperatures as high as 115.degree. C. They are particularly useful in sensing devices which seek to identify the presence of ultraviolet light in the UV missile warning band.
    Type: Grant
    Filed: August 30, 1996
    Date of Patent: November 17, 1998
    Assignee: Northrop Grumman Corporation
    Inventors: Narsingh B. Singh, William D. Partlow, Steven Strauch, Albert M. Stewart, John F. Jackovitz, David W. Coffey, Robert Mazelski
  • Crystals for ultraviolet light filters
    Patent number: 5788765
    Abstract: Crystals formed of a solid-solution of K.sub.2 Ni(SO.sub.4).sub.2 6H.sub.2 O provide very good materials for filtering ultraviolet light and will not deteriorate in temperatures as high as 110.degree. C. They are particularly useful in sensing devices which seek to identify the presence of ultraviolet light in the UV missile warning band.
    Type: Grant
    Filed: August 30, 1996
    Date of Patent: August 4, 1998
    Assignee: Northrop Grumman Corporation
    Inventors: Narsingh B. Singh, William D. Partlow, Steven Strauch, Albert M. Stewart, John F. Jackovitz, David W. Coffey
  • Crystals for ultraviolet light filters
    Patent number: 5742428
    Abstract: Crystals formed of a solid-solution of Ni(BF.sub.4).sub.2 6H.sub.2 O provide very good materials for filtering ultraviolet light and will not deteriorate in temperatures as high as 110.degree. C. They are particularly useful in sensing devices which seek to identify the presence of ultraviolet light in the UV missile warning band.
    Type: Grant
    Filed: September 30, 1996
    Date of Patent: April 21, 1998
    Assignee: Northrop Grumman Corporation
    Inventors: Narsingh B. Singh, William D. Partlow, Steven Strauch, Albert M. Stewart, John F. Jackovitz, David W. Coffey, Robert Mazelsky, James D.B. Smith