Patents by Inventor Britt-Marie Ekman

Britt-Marie Ekman 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 charge and element, and detonator containing such a charge
    Patent number: 5654520
    Abstract: A pyrotechnic delay charge for providing delays in the millisecond and second ranges, comprising the components bismuth oxide as an oxidation agent and silicon as a fuel. The invention also relates to a pyrotechnic delay element having an enclosure containing the pyrotechnical delay charge, and to a detonator having a housing, ignition means disposed at one end of the housing, a base charge of a secondary explosive disposed at the other end of the housing and the pyrotechnic delay charge disposed therebetween.
    Type: Grant
    Filed: October 17, 1995
    Date of Patent: August 5, 1997
    Assignee: Nitro Nobel AB
    Inventors: Tore Boberg, Staffan Carlsson, Britt-Marie Ekman, Bo Karlsson