Patents by Inventor Herbert M. Stewart

Herbert 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).

  • Spherical vacuum insulated container
    Patent number: 4320856
    Abstract: This spherical insulated container is constructed from a pair of concentric spheres between which is formed a chamber. Communication of liquids to be thermally insulated within the interior sphere is provided by adjacent openings in each sphere defining a mouth area. Either a thermally insulating cap or pump dispenser seals the mouth of the container. A pump dispenser provides a convenient mechanism for dispensing liquids from a spherically shaped insulated container.
    Type: Grant
    Filed: February 19, 1980
    Date of Patent: March 23, 1982
    Assignee: Aladdin Industries, Incorporated
    Inventors: Herbert M. Stewart, Jack W. La Fevor
  • Microwave safe vacuum insulated containers and method of manufacture
    Patent number: 4184601
    Abstract: Vacuum insulated containers are disclosed in which the usual metallic coating applied to the vacuum filler is omitted. In its place an electrically nonconducting, nonadsorbent granular material, such as finely divided silica, is employed in the annular, evacuated space to reduce infrared radiation loss. The construction is safe for use in microwave ovens and has a relatively high insulating efficiency as compared with vacuum fillers without infra barriers and nonvacuum insulated containers.
    Type: Grant
    Filed: August 17, 1978
    Date of Patent: January 22, 1980
    Assignee: Aladdin Industries, Incorporated
    Inventors: Herbert M. Stewart, William J. Tanner
  • Vacuum bottle construction
    Patent number: 4138027
    Abstract: A vacuum bottle construction is disclosed in which the vacuum filler is formed from a pair of concentric thin wall metal cylinders. The cylinders are formed of a thin metallic material, such as mild steel, which is unable to withstand the pressure differential of atmospheric pressure on one side and a vacuum on the other side. To prevent collapse of the filler a rigid jacket is provided over the outer wall in intimate contact therewith to prevent collapse.
    Type: Grant
    Filed: November 17, 1977
    Date of Patent: February 6, 1979
    Assignee: Aladdin Industries, Incorporated
    Inventors: Alva L. Frye, Herbert M. Stewart