Patents by Inventor Arnold Hoogerwerf

Arnold Hoogerwerf 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).

  • FABRICATION OF REINFORCED NANOPOROUS MEMBRANES
    Publication number: 20100084333
    Abstract: The present invention discloses a method for manufacturing ultra-thin reinforced membranes from a SOI wafer having a front side and a back side, the front side having an etch stop layer buried under a device layer, provided for by forming reinforcement bars by etching openings in the device layer down to the etch stop layer, filling the openings at least partially by deposition of a first filler, and then polishing the top surface to the silicon surface before depositing a membrane material.
    Type: Application
    Filed: March 7, 2008
    Publication date: April 8, 2010
    Applicant: LIFECARE AS
    Inventors: Arnold Hoogerwerf, Thomas Overstolz
  • Watch hairspring and method for making same
    Publication number: 20050281137
    Abstract: The invention relates mainly to a hairspring intended to equip the balance wheel of a mechanical timepiece. It is in the form of a spiraled rod (10) cut from an {001} single-crystal silicon plate. Its structure and its dimensions are calculated so as to minimize the thermal drift of the hairspring/balance-wheel assembly by means of the first and second thermal coefficients of its spring constant.
    Type: Application
    Filed: October 30, 2003
    Publication date: December 22, 2005
    Inventors: Claude Bourgeois, Andre Perret, Arnold Hoogerwerf