Patents by Inventor Ingemar P. Persson

Ingemar P. Persson 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).

  • Method of explosion-welding rolling billets intended for package rolling
    Patent number: 4391403
    Abstract: A method of manufacturing a compound plate by explosion-welding, the compound plate being intended for package-rolling. The plating material is smaller in area than the base material so that an edge is formed around the periphery of the base material, this free edge surface being protected by the attachment of metal strips, after which an explosive charge, the area of which is at least as great as that of the base material, is placed on top of the plating material and detonated.
    Type: Grant
    Filed: April 13, 1981
    Date of Patent: July 5, 1983
    Assignee: Nitro Nobel AB
    Inventor: Ingemar P. Persson
  • Method of joining an inner metal pipe with an outer surrounding metal pipe
    Patent number: 4228941
    Abstract: A method of joining an inner metal pipe with a surrounding outer metal pipe comprising placing inside the inner pipe a contact body which prevents change of the inside diameter of the inner pipe and detonating an explosive around the outer pipe so that the inner surface of the outer pipe is metallurgically joined to the outer surface of the inner pipe. The contact body is a rigid body made of salt and the contact body is removed after the pipes are joined by dissolving the contact body in a fluid in which the salt is soluable.
    Type: Grant
    Filed: November 2, 1978
    Date of Patent: October 21, 1980
    Assignee: Nitro Nobel AB
    Inventor: Ingemar P. Persson