Patents by Inventor A. Leonard Haugse

A. Leonard Haugse 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).

  • Polyurethane forming no-bake foundry binders
    Patent number: 6017978
    Abstract: This invention relates to a polyurethane no-bake foundry binder comprising (1) phenolic resin component which comprises (a) a phenolic resin, (b) hydrofluoric acid, and (c) a silane, and (2) an organic polyisocyanate component, and (3) a liquid tertiary amine catalyst component. The binders are used to prepare foundry mixes by mixing the binder with a foundry aggregate. Foundry shapes are prepared with the mixes by the no-bake process and are used to cast metal parts.
    Type: Grant
    Filed: February 28, 1998
    Date of Patent: January 25, 2000
    Assignee: Ashland Inc.
    Inventors: Chia-hung Chen, Ken K. Chang, Albert Leonard Haugse, Thomas E. Dando
  • Heat cured foundry binder systems and their uses
    Patent number: 5612392
    Abstract: This invention relates to a heat cured foundry binder system comprising as separate components (A) a furan resin, and (B) an effective amount of a curing catalyst composition comprising water, a copper aryl sulfonate, a aryl sulfonic acid, preferably polyvinyl alcohol, and a copper halide.
    Type: Grant
    Filed: May 16, 1995
    Date of Patent: March 18, 1997
    Assignee: Ashland Inc.
    Inventors: Ken K. Chang, Thomas E. Dando, A. Leonard Haugse
  • 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