Patents by Inventor David Hildreth

David Hildreth 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).

  • Patent number: 9545029
    Abstract: A cabinet frame enclosure is provided having a first side wall, a second side wall, a first opening and a second opening each in combination defining an interior space for accommodating a plurality of equipment, the equipment being removable through the first opening.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: January 10, 2017
    Assignee: Methode Electronics, Inc.
    Inventors: Rex Park, David Hildreth, Tim Hazzard
  • Publication number: 20070237961
    Abstract: Typical road surfaces are concrete, and gravel filled asphalt. They are very abrasive to fabrics that slide on those surfaces. For the new side impact curtain-type airbag, in a rollover situation, the airbag needs to protect the occupant from directly contacting the road hazard and should not deflate quickly or break when sliding on such road surfaces. We have found that a layer of elastomer can provide much better abrasion resistance than a layer of heavy industrial fabric. A Jacquard bag coated with 1.2 oz/yd2 polyurethane showed significant increase in air leakage rate after 5 cycles of concrete sliding abrasion. A 3 mil thick polyurethane film was laminated to the coated Jacquard woven airbag. After 110 cycles of sliding abrasion using the same concrete, no visual damage or change In bag leakage was observed. This finding indicates surprisingly better abrasion resistance of a thin elastomer film than a heavy industrial fabric.
    Type: Application
    Filed: September 27, 2004
    Publication date: October 11, 2007
    Inventors: Shulong Li, Derek Bowen, Charles Willbanks, Ramesh Keshavaraj, David Hildreth
  • Patent number: 4111649
    Abstract: A process for the manufacture of stable, concentrated solutions of water-soluble tertiary ammonium salts of disazo dyestuffs is described, which comprises diazotizing 2 moles of the same primary aromatic amine or 1 mole each of different primary aromatic amines and reacting the diazo mixture with 1 mole of a compound which is able to couple with diazonium salt in at least 2 positions, in the presence of at least 2 moles of a tertiary amine and optionally other assistants. The resulting solutions prove stable even on prolonged storing at room temperature and are not affected by frost. The solutions are miscible in any ratio with water or, in part, also with suitable water-miscible organic solvents.
    Type: Grant
    Filed: December 23, 1975
    Date of Patent: September 5, 1978
    Assignee: Ciba-Geigy AG
    Inventors: Frank Ward, deceased, John David Hildreth, Herbert Alexander Potts