Patents by Inventor Herman Pius Schmid

Herman Pius Schmid 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).

  • Method of manufacturing mould members of polyurethane-bonded granular material
    Patent number: 3985699
    Abstract: A method for manufacturing mould members which comprises mixing together a granular material such as sand; a polyurethane forming cold-hardenable bonding agent composition; and a solvent for the bonding agent composition wherein the solvent has an evaporation rate which corresponds to a reference value of 100-800 when the normal butyl acetate has a value of 100 and pure acetone has a reference value of 1,000; shaping the mixture into a predetermined form; and blowing gaseous amine through the mixture to catalyze the formation of the polyurethane bonding agent.
    Type: Grant
    Filed: June 2, 1975
    Date of Patent: October 12, 1976
    Assignee: AB Bofors
    Inventor: Herman Pius Schmid