Patents by Inventor Eric W. Grondahl

Eric W. Grondahl 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).

  • High-elasticity press felt
    Patent number: 4323622
    Abstract: A high-elasticity dewatering felt for use in e.g. papermaking and cellulose machines wherein the elastic properties of the felt are obtained by admixture thereinto of high-molecular thermoplastic elastomer materials, alternatively high-molecular cross-linked urethane-based elastomer materials, which elastomer materials are capable of stretching to at least twice their original length and subsequently, after relief of the load thereon, rapidly return to substantially their original length.
    Type: Grant
    Filed: July 17, 1979
    Date of Patent: April 6, 1982
    Assignee: Albany International Corp.
    Inventors: Arne I. L. Gladh, Eric W. Grondahl