Patents by Inventor Arnoldus J. Ultee

Arnoldus J. Ultee 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).

  • Wobble-resisting furniture
    Patent number: 5251858
    Abstract: A wobble-resistant piece of furniture, such as a table, with at least four legs, one of the legs being weighted with respect to the others, and a shorter opposite leg having an extending member automatically extending to the floor.
    Type: Grant
    Filed: May 29, 1992
    Date of Patent: October 12, 1993
    Inventor: Arnoldus J. Ultee
  • Oligomeric semicarbazide additives for spandex
    Patent number: 4973618
    Abstract: Oligormeric polyether/urethanes with semicarbazide end-groups protect spandex fibers from discoloration in atmospheric fumes and/or light. The oligomers are prepared from polyether glycols, diisocyanates and N,N-dialkylhydrazine.
    Type: Grant
    Filed: September 29, 1989
    Date of Patent: November 27, 1990
    Assignee: E. I. Du Pont de Nemours & Company
    Inventor: Arnoldus J. Ultee
  • Hindered tertiary amine aminoalkyl methacrylate stabilizer for spandex
    Patent number: 4895902
    Abstract: An improved spandex composition is provided in which a polymeric hindered tertiary amine stabilizer is present. The polymeric amine is poly(diisopropylaminoethyl methacrylate/hydroxybutyl acrylate) or poly(diisopropylaminoethyl methacrylate/ethyl acrylate).
    Type: Grant
    Filed: July 28, 1988
    Date of Patent: January 23, 1990
    Assignee: E. I. DuPont De Nemours and Company
    Inventors: Gary A. Lodoen, Arnoldus J. Ultee