Patents by Inventor Rolf Laurien

Rolf Laurien 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).

  • Cold crucible for melting and crystallizing non-metallic inorganic compounds
    Patent number: 4687646
    Abstract: A cold crucible for melting and crystallizing non-metallic inorganic compounds having a cooled crucible wall in the form of metal pipes through which cooling medium flows which are in mechanical connection with the bottom of the crucible through which cooling medium also flows, and having an induction coil which surrounds the wall of the crucible and via which high frequency energy can be coupled in the contents of the crucible and having a second induction coil which can be controlled independently of the induction coil surrounding the wall of the crucible and which is provided below the bottom of the crucible, and having a crucible bottom consisting of a dielectric material.
    Type: Grant
    Filed: May 2, 1984
    Date of Patent: August 18, 1987
    Assignee: U.S. Philips Corporation
    Inventors: Werner D. Mateika, Rolf Laurien, Manfred R. Liehr
  • Cold crucible system and method for the meeting and crystallization of non-metallic inorganic compounds
    Patent number: 4609425
    Abstract: A cold crucible system and method for melting and crystallizing non-metallic inorganic compounds having a crucible, the side and the bottom of which are formed of metal pipes through which a cooling medium flows and independently excitable induction coils surrounding the side wall and the bottom of the crucible for coupling high energy into non-metallic inorganic compound present in said crucible and thus to melt said compound in said crucible, a member formed of an electrically conductive material and inert to any of said melt present in said crucible positioned at a distance above the bottom of the crucible and a container, opened at the top, lowered so as to project from the melt formed in the crucible, provided with apertures for the flow of the melt, and so positioned so as to contain up to 25% of the contents of the crucible.
    Type: Grant
    Filed: May 2, 1984
    Date of Patent: September 2, 1986
    Assignee: U.S. Philips Corporation
    Inventors: Dieter W. Mateika, Rolf Laurien
  • Magnetic device having a monocrystalline garnet substrate bearing a magnetic layer
    Patent number: 4454206
    Abstract: Magnetic device having a monocrystalline substrate bearing a magnetic layer, said substrate having a composition on the basis of rare earth metal gallium garnet of the general formula ##STR1## wherein A=gadolinium and/or samarium and/or neodym and/or yttriumB=calcium and/or strontiumC=magnesiumD=zirconium and/or tin andO<x.ltoreq.0.7; O<y.ltoreq.0.7 and x+y.ltoreq.0.8.
    Type: Grant
    Filed: July 22, 1982
    Date of Patent: June 12, 1984
    Assignee: U.S. Philips Corporation
    Inventors: Dieter Mateika, Rolf Laurien
  • Magnetic device having a monocrystalline garnet substrate bearing a magnetic layer
    Patent number: 4379853
    Abstract: A magnetic device has a monocrystalline garnet substrate bearing a magnetic layer, in particular for use as information storage.Magmetic device having a monocrystalline substrate bearing a magnetic layer, with the substrate having a composition on the basis of rare earth metal gallium garnet of the general formula ##STR1## wherein A=gadolinium and/or smarium and/or neodym and/or yttriumB=calcium and/or strontiumC=magnesiumD=zirconium and/or tin and0<x.ltoreq.0.7; 0<y.ltoreq.0.7 and x+y.ltoreq.0.8.
    Type: Grant
    Filed: July 14, 1980
    Date of Patent: April 12, 1983
    Assignee: U.S. Philips Corporation
    Inventors: Dieter Mateika, Rolf Laurien