Patents by Inventor Robert F. Weltzien

Robert F. Weltzien 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).

  • Fertilizer and/or soil amendment
    Patent number: 4919702
    Abstract: The present invention relates to a fertilizer and/or soil amendment containing L ascorbic acid, marine algae, and humic acid. The fertilizers may also contain nitrogen, phosphorous and/or potassium. The fertilizers and/or soil amendments may be produced in a solid form or a liquid form. The fertilizers have utility in promoting the growth of grass and plants. Methods of preparing the fertilizers and/or soil amendments are also described.
    Type: Grant
    Filed: May 3, 1989
    Date of Patent: April 24, 1990
    Assignee: Soilizer Corporation
    Inventors: Robert F. Weltzien, Graeme Berlyn
  • Fertilizer and/or soil amendment
    Patent number: 4846870
    Abstract: The present invention relates to a fertilizer and/or soil amendment containing L ascorbic acid, marine algae, and humic acid. The fertilizer and/or soil amendment may be produced in a solid form or a liquid form. The fertilizer has utility in promoting the growth of grass and plants. A method of preparing the fertilizer and/or soil amendment is also described.
    Type: Grant
    Filed: May 9, 1988
    Date of Patent: July 11, 1989
    Assignee: Soilizer Corporation
    Inventors: Robert F. Weltzien, Graeme Berlyn