Patents by Inventor Young D. Kim, deceased

Young D. Kim, deceased 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).

  • Heat cured foundry mixes and their use
    Patent number: 5607986
    Abstract: This invention relates to nitrogen free heat cured foundry mixes essentially free of free formaldehyde comprising (a) a nitrogen free modified furan resin, (b) furfuryl alcohol, (c) polyvinyl acetate, preferably(d) a tar selected from the group consisting of resorcinol pitch, bisphenol A tar, and (e) a latent acid curing catalyst. The foundry mixes are used to prepare foundry shapes. They are cured in the presence of the latent acid curing catalyst by heating at an elevated temperature.
    Type: Grant
    Filed: April 17, 1995
    Date of Patent: March 4, 1997
    Assignee: Ashland Inc.
    Inventors: Young D. Kim, deceased, A. Leonard Haugse