Patents by Inventor Richard Kieffer

Richard Kieffer 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).

  • Endothermic syringe sleeve
    Patent number: 10981173
    Abstract: The endothermic syringe sleeve is an insulating storage structure. The endothermic syringe sleeve is configured to store a burette that contains an arterial blood samples. The endothermic syringe sleeve is configured to cool the arterial blood sample. The endothermic syringe sleeve is configured to store the arterial blood sample in the cooled state. The endothermic syringe sleeve comprises an endothermic sleeve and the burette. The endothermic sleeve forms a cooled environment within which the burette is stored.
    Type: Grant
    Filed: September 25, 2018
    Date of Patent: April 20, 2021
    Inventor: Richard Kieffer
  • Cemented carbide
    Patent number: 4342594
    Abstract: An improvement in a cemented carbide is disclosed. Molybdenum, tungsten and carbon are mixed and heated in a nitrogen-containing atmosphere to form a tungsten-molybdenum carbonitride (Mo, W) (C, N) having the structure of tungsten carbide. The molybdenum-tungsten carbonitride is mixed with a binder metal (and, if desired, another hard material) and sintered in a conventional manner to form a dense, substantially pore-free material which is similar in a number of properties to the more expensive tungsten carbide.
    Type: Grant
    Filed: December 12, 1979
    Date of Patent: August 3, 1982
    Assignee: Sandvik Aktiebolag
    Inventors: Peter Ettmayer, Richard Kieffer
  • Cemented carbide containing molybdenum tungsten carbonitride having WC type structure
    Patent number: 4212671
    Abstract: An improvement in a cemented carbide is disclosed. Molybdenum, tungsten and carbon are mixed and heated in a nitrogen containing atmosphere to form a tungsten-molybdenum carbonitride (Mo, W) (C, N) having the structure of tungsten carbide. The molybdenum-tungsten carbonitride is mixed with a binder metal (and, if desired, another hard material) and sintered in a conventional manner to form a dense, substantially pore-free material which is similar in a number of properties to the more expensive tungsten carbide.
    Type: Grant
    Filed: January 27, 1978
    Date of Patent: July 15, 1980
    Assignee: Sandvik Aktiebolag
    Inventors: Peter Ettmayer, Richard Kieffer
  • Hard tantalum nitride base alloys
    Patent number: 4095978
    Abstract: The invention relates to hard fritted alloys and a method for their preparation. These alloys essentially contain cubic tantalum nitride with a binder based on carbides or nitrides of metal of groups IV-A and V-A, likewise of cubic structure, fritted at a temperature from 1400.degree. to 1700.degree. C at a nitrogen pressure from 30 to 200 bars. They are particularly appropriate for the manufacture of tools for cutting metal.
    Type: Grant
    Filed: November 5, 1976
    Date of Patent: June 20, 1978
    Assignee: Ugine Carbone
    Inventor: Richard Kieffer