Patents by Inventor Petry B. Ritter

Petry B. Ritter 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).

  • Delay detonator device
    Patent number: 4312271
    Abstract: A reliable delay detonator device is disclosed which is thermally and chemically stable and which is also insensitive to mechanical shock and electrostatic charge. The device can be made with differing time delays and can be interconnected with other detonator devices for achieving multiple delay characteristics. A modification of the device is particularly suited to high temperature use. None of the devices contain any primary explosives, the device relying upon pyrotechnic delay materials and secondary explosives.
    Type: Grant
    Filed: September 22, 1980
    Date of Patent: January 26, 1982
    Assignee: Systems, Science and Software
    Inventors: Edward A. Day, Glenn E. Seay, Petry B. Ritter