Patents by Inventor Heimo Josef Langer

Heimo Josef Langer 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).

  • Benzylic ether phenolic resole resins and their uses
    Patent number: 5908914
    Abstract: This invention relates to benzylic ether phenolic resole resins prepared in a sealed reaction vessel and their uses. The benzylic ether phenolic resole resins are prepared by heating phenol and an aldehyde in a sealed reaction vessel in the presence of a divalent metal catalyst without removing water generated by the reaction until an appropriate endpoint for the resin is reached. The benzylic ether phenolic resole resins produced by the process are preferably free or essentially free of unreacted formaldehyde and can be used in the resin component of phenolic-urethane foundry binders to make foundry cores and/or molds by the cold-box and no-bake processes. The cores and/or molds are used for making metal castings.
    Type: Grant
    Filed: July 17, 1996
    Date of Patent: June 1, 1999
    Assignee: Ashland Inc.
    Inventors: Thomas Edward Dando, William Rexford Dunnavant, Robert Bernard Fechter, Heimo Josef Langer
  • Process for preparing benzylic ether phenolic resole resins
    Patent number: 5756640
    Abstract: This invention relates to a process for preparing benzylic ether phenolic resole resins in a sealed reaction vessel. The benzylic ether phenolic resole resins are prepared by heating phenol and an aldehyde in a sealed reaction vessel in the presence of a divalent metal catalyst without removing water generated by the reaction until an appropriate endpoint for the resin is reached. The benzylic ether phenolic resole resins produced by the process are preferably free or essentially free of unreacted formaldehyde and can be used in the resin component of phenolic-urethane foundry binders to make foundry cores and/or molds by the cold-box and no-bake processes. The cores and/or molds are used for making metal castings.
    Type: Grant
    Filed: July 17, 1996
    Date of Patent: May 26, 1998
    Assignee: Ashland Inc.
    Inventors: Thomas Edward Dando, William Rexford Dunnavant, Robert Bernard Fechter, Heimo Josef Langer
  • Benzylic ether phenolic resole resins
    Patent number: 5739255
    Abstract: This invention relates to benzylic ether phenolic resole resins prepared in a sealed reaction vessel. The benzylic ether phenolic resole resins are prepared by heating phenol and an aldehyde in a sealed reaction vessel in the presence of a divalent metal catalyst without removing water generated by the reaction until an appropriate endpoint for the resin is reached. The benzylic ether phenolic resole resins produced by the process are preferably free or essentially free of unreacted formaldehyde and can be used in the resin component of phenolic-urethane foundry binders to make foundry cores and/or molds by the cold-box and no-bake processes. The cores and/or molds are used for making metal castings.
    Type: Grant
    Filed: July 17, 1996
    Date of Patent: April 14, 1998
    Assignee: Ashland Inc.
    Inventors: Thomas Edward Dando, William Rexford Dunnavant, Robert Bernard Fechter, Heimo Josef Langer