Patents by Inventor Armin Dittmar

Armin Dittmar 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).

  • Material for sealing borehole walls
    Patent number: 4670056
    Abstract: Ground milk-of-lime grit with a maximum grain size of 0.75 mm is mixed with calcium or magnesium chloride and water to form a pumpable mixture which sets into an acid soluble mass only after about 1.5 to 4 hours.
    Type: Grant
    Filed: November 9, 1984
    Date of Patent: June 2, 1987
    Inventors: Hermann Alsdorf, Armin Dittmar