Patents by Inventor Alexander Kral

Alexander Kral 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).

  • Titanium oxide-containing aluminum oxide particles based on corundum melted in an electric arc furnace from calcined alumina, and a method for the production thereof
    Patent number: 9163128
    Abstract: Titanium oxide-containing aluminum oxide particles are based on corundum melted in an electric arc furnace from calcined alumina. The particles may have an aluminum oxide content of less than 97.0% by weight, a titanium oxide content ranging from 1.3% by weight to 1.8% by weight, and a zirconium oxide content of ranging from 0.02% by weight to 0.1% by weight. The aluminum oxide particles may have an arithmetic mean compactness of less than 0.8.
    Type: Grant
    Filed: November 23, 2012
    Date of Patent: October 20, 2015
    Assignee: Center For Abrasives and Refractories Research & Development C.A.R.R.D. GmbH
    Inventors: Sebastian Sachse, Andreas Boerger, Alexander Kral
  • Titanium Oxide-Containing Aluminum Oxide Particles Based on Corundum Melted in an Electric Arc Furnace from Calcined Alumina, and a Method for the Production Thereof
    Publication number: 20150175769
    Abstract: Titanium oxide-containing aluminum oxide particles are based on corundum melted in an electric arc furnace from calcined alumina. The particles may have an aluminum oxide content of less than 97.0% by weight, a titanium oxide content ranging from 1.3% by weight to 1.8% by weight, and a zirconium oxide content of ranging from 0.02% by weight to 0.1% by weight. The aluminum oxide particles may have an arithmetic mean compactness of less than 0.8.
    Type: Application
    Filed: November 23, 2012
    Publication date: June 25, 2015
    Inventors: Sebastian Sachse, Andreas Börger, Alexander Kral
  • Multi-primary distributed active transformer amplifier power supply and control
    Patent number: 8242855
    Abstract: An integrated power combiner is disclosed. The power combiner includes a first circular geometry primary winding having one or more inductive elements, such as an active winding with one or more driver stages. A circular geometry secondary winding is disposed adjacent to the first primary winding, such as an active winding with one or more driver stages. A second circular geometry primary winding is disposed adjacent to the secondary winding and has one or more inductive elements. One or more connections are provided between one or more of the inductive elements of the first circular geometry primary winding and one or more of the inductive elements of the second circular geometry primary winding.
    Type: Grant
    Filed: March 29, 2011
    Date of Patent: August 14, 2012
    Assignee: Axiom Microdevices, Inc.
    Inventors: Scott D. Kee, Ichiro Aoki, Hui Wu, Seyed-Ali Hajimiri, Frank Carr, Rahul Magoon, Alexander Kral, Afshin Mellati, Florian Bohn, Donald McClymont
  • Multi-primary distributed active transformer amplifier power supply and control
    Patent number: RE45974
    Abstract: An integrated power combiner is disclosed. The power combiner includes a first circular geometry primary winding having one or more inductive elements, such as an active winding with one or more driver stages. A circular geometry secondary winding is disposed adjacent to the first primary winding, such as an active winding with one or more driver stages. A second circular geometry primary winding is disposed adjacent to the secondary winding and has one or more inductive elements. One or more connections are provided between one or more of the inductive elements of the first circular geometry primary winding and one or more of the inductive elements of the second circular geometry primary winding.
    Type: Grant
    Filed: November 12, 2013
    Date of Patent: April 12, 2016
    Assignee: AXIOM MICRODEVICES, INC.
    Inventors: Scott D. Kee, Ichiro Aoki, Hui Wu, Seyed-Ali Hajimiri, Frank Carr, Rahul Magoon, Alexander Kral, Afshin Mellati, Florian Bohn, Donald McClymont