Patents by Inventor Ove Wallergard

Ove Wallergard 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 for bleaching pulp with hydrogen peroxide recovered from cellulosic spent liquor
    Patent number: 5628872
    Abstract: The process for producing hydrogen peroxide, used in the bleaching of pulp, uses the hydrogen generated wholly or partly by the gasification or partial combustion of cellulose spent liquors used in digesting cellulose material to produce the hydrogen peroxide.
    Type: Grant
    Filed: April 10, 1995
    Date of Patent: May 13, 1997
    Assignee: Kanyr AB
    Inventors: Ake Backlund, Lars Stigsson, Ove Wallergard