Patents by Inventor Hilmar Haverstreng

Hilmar Haverstreng 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).

  • Butyl glazing composition
    Patent number: 4032489
    Abstract: A composition based on butyl rubber resins and filler particularly useful for hot melt application as a sealant for combining a plurality of glass panes in an insulating glazing unit in which improved workability in heated condition is secured without adversely affecting its other properties through inclusion of a minor amount of a thermoplastic block copolymer of polystyrene and polybutadiene or polystyrene and polyisoprene.
    Type: Grant
    Filed: June 24, 1975
    Date of Patent: June 28, 1977
    Assignee: USM Corporation
    Inventor: Hilmar Haverstreng