Patents by Inventor Jan Jongstra

Jan Jongstra 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 and tools for manufacturing a master cylinder for a brake system, and cylinder manufactured therewith
    Publication number: 20040025688
    Abstract: A method for manufacturing a master cylinder for a brake system, comprising a cylindrical main body, at least one flange integrally connected therewith, and a bore, extending in the cylindrical main body and through said at least one flange, wherein the master cylinder is manufactured by cold forging. Preferably the flange is cold forged by upsetting. Subsequently the cylindrical main body is provided with a bore. Said bore is realized in a series of forging steps, wherein at least the portion where the bore pierces the flange is executed in a separate step.
    Type: Application
    Filed: August 12, 2002
    Publication date: February 12, 2004
    Inventors: Leonardus Gerhardus P. Koekenberg, Geert Jan Jongstra, Henricus Johannes M. Alferink
  • T-cell activation related gene
    Patent number: 4994369
    Abstract: Nucleic acids and peptides are provided which can be used for detecting the status of functional T-lymphocytes as to stimulation and the time of stimulation. The nucleic acids and peptides may be provided by cloning and expression using recombinant techniques. These diagnoses may be used to determine whether T-cells are functional and the degree to which a T-cell population has been stimulated.
    Type: Grant
    Filed: December 15, 1987
    Date of Patent: February 19, 1991
    Assignee: The Board of Trustees of the Leland Stanford Jr. Univ.
    Inventors: Alan M. Krensky, Mark Davis, Thomas Schall, Jan Jongstra