Patents by Inventor Arvo Wahlberg, deceased

Arvo Wahlberg, deceased 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 producing a phosphorus fertilizer soil conditioner
    Patent number: 4804401
    Abstract: A method for producing combined phosphorus fertilizer and soil conditioner in which phosphate rock and, as reaction matter, organic acidic matter are used. In a method according to the invention, the acidic mass is organic, for instance, bark waste, peat, waste fiber from a cellulose production plant or paper mill, sawdust or similar matter.
    Type: Grant
    Filed: October 17, 1986
    Date of Patent: February 14, 1989
    Inventors: Arvo Wahlberg, deceased, by Anna-Maija Wahlberg, legal representative
  • Production method of combined phosphorus fertilizer and soil conditioner
    Patent number: 4710219
    Abstract: A method for producing combined phosphorus fertilizer and soil conditioner in which phosphate rock and, as reaction matter, organic acidic matter are used. In a method according to the invention, the acidic mass is organic, for instance, bark waste, peat, peat mud or waste fibre from a cellulose production plant or the solid component of communal sewage.
    Type: Grant
    Filed: April 17, 1986
    Date of Patent: December 1, 1987
    Inventors: Arvo Wahlberg, deceased, by Anna-Maija Wahlberg, heiress