Patents by Inventor Esa J. Rousu

Esa J. Rousu 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).

  • Process for producing cellulose and fertilizer by-product
    Patent number: 6503369
    Abstract: The invention relates to a process for producing cellulose and a fertilizer by-product by using a closed cycle of cooking chemicals and process waters. In the process of the invention, the pulp is bleached by at least partly using potassium hydroxide as a bleaching chemical. Thus, a bleach concentrate rich in potassium is obtained from the bleach filtrate, which bleach concentrate is combined with ashes obtained from the burning of lignin and other organic matter recovered from pulp production as a by-product, in order to be used as a potash fertilizer. The bleach-concentrate can also be used as a potash fertilizer as such. The invention also relates to a potash fertilizer obtained this way.
    Type: Grant
    Filed: October 3, 2001
    Date of Patent: January 7, 2003
    Assignee: Chempolis Oy
    Inventors: Pasi P. Rousu, Päivi P. Rousu, Esa J. Rousu
  • Process for producing cellulose, and by-product
    Publication number: 20020069983
    Abstract: The invention relates to a process for producing cellulose and a fertilizer by-product by using a closed cycle of cooking chemicals and process waters. In the process of the invention, the pulp is bleached by at least partly using potassium hydroxide as a bleaching chemical. Thus, a bleach concentrate rich in potassium is obtained from the bleach filtrate, which bleach concentrate is combined with ashes obtained from the burning of lignin and other organic matter recovered from pulp production as a by-product, in order to be used as a potash fertilizer. The bleach concentrate can also be used as a potash fertilizer as such. The invention also relates to a potash fertilizer obtained this way.
    Type: Application
    Filed: October 3, 2001
    Publication date: June 13, 2002
    Applicant: Chempolis Oy
    Inventors: Pasi P. Rousu, Paivi P. Rousu, Esa J. Rousu