Patents by Inventor Peter Raidt

Peter Raidt 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 producing a cellulosic yarn
    Patent number: 6042767
    Abstract: In a process for manufacturing a cellulosic yarn by spinning of a solution of cellulose in a tertiary amine oxide, the solution possibly containing water and/or a stabilizer, to form fibers or filaments, coagulating, washing, and drying, the yarns are treated prior to drying with an aqueous alkaline solution for a period less than 20 seconds.
    Type: Grant
    Filed: November 24, 1998
    Date of Patent: March 28, 2000
    Assignee: Akzo Nobel NV
    Inventors: Abdulmajid Hashemzadeh, Peter Raidt
  • Sound-absorbing element
    Patent number: 4555433
    Abstract: A sound-absorbing element of films has adjacent, cup-shaped recesses in the orm of a grid. The bottom surfaces of the films which are to be exposed to the sound field may be excited into dissipative vibrations when sound is incident thereon. The upper edges of the cup-shaped recesses are jointly covered by another flat material web. The bottom surfaces of the cup-shaped recesses are subdivided into bases by one or more crimp-shaped recesses, the depth of which is appreciably smaller than the depth of the cup-shaped recesses. The sound-absorbing element may be used in building, underground and tunnel construction and in vehicle construction.
    Type: Grant
    Filed: September 9, 1983
    Date of Patent: November 26, 1985
    Assignees: Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V., Ewald Dorken AG
    Inventors: Dieter Jablonka, Klaus Urban, Heinz-Peter Raidt, Eberhard Schepers