Patents by Inventor Roger Barstrom

Roger Barstrom 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).

  • COMPOSITIONS AND METHODS FOR TREATING WASTEWATER
    Publication number: 20250382205
    Abstract: The present embodiments generally relate to compositions and methods for the treatment of fluids in need of treatment, such as, for example, industrial wastewaters. The compositions and methods for treating the fluids in need of treatment generally comprises the use of one or more stable ferrous products in amounts effective to treat said fluids.
    Type: Application
    Filed: June 24, 2025
    Publication date: December 18, 2025
    Inventors: Fazlollah AZARNOUSH, Roger BARSTROM
  • Compositions and methods for treating wastewater
    Patent number: 12391586
    Abstract: The present embodiments generally relate to compositions and methods for the treatment of fluids in need of treatment, such as, for example, industrial wastewaters. The compositions and methods for treating the fluids in need of treatment generally comprises the use of one or more stable ferrous products in amounts effective to treat said fluids.
    Type: Grant
    Filed: August 6, 2020
    Date of Patent: August 19, 2025
    Assignee: KEMIRA OYJ
    Inventors: Fazlollah Azarnoush, Roger Barstrom
  • COMPOSITIONS AND METHODS FOR TREATING WASTEWATER
    Publication number: 20240140839
    Abstract: The present embodiments generally relate to compositions and methods for the treatment of fluids in need of treatment, such as, for example, industrial wastewaters. The compositions and methods for treating the fluids in need of treatment generally comprises the use of one or more stable ferrous products in amounts effective to treat said fluids.
    Type: Application
    Filed: August 6, 2020
    Publication date: May 2, 2024
    Inventors: Fazlollah AZARNOUSH, Roger BARSTROM
  • COMPOSITIONS AND METHODS FOR TREATING WASTEWATER
    Publication number: 20220267177
    Abstract: The present embodiments generally relate to compositions and methods for the treatment of fluids in need of treatment, such as, for example, industrial wastewaters. The compositions and methods for treating the fluids in need of treatment generally comprises the use of one or more stable ferrous products in amounts effective to treat said fluids.
    Type: Application
    Filed: August 6, 2020
    Publication date: August 25, 2022
    Inventors: Fazlollah AZARNOUSH, Roger BARSTROM
  • Method of treating residual acid
    Publication number: 20040126310
    Abstract: A method of treating residual acid from production of chlorine dioxide is described. The method is characterized in that a compound containing iron is added to the residual acid to react therewith and form a product, which contains iron in trivalent form. As iron compound preferably ferrous sulphate is added, which under oxidation reacts with the residual acid to form ferric salt. Preferably sodium chlorate, sodium hypochlorite, hydrogen peroxide or an oxygen-containing gas is added as oxidant.
    Type: Application
    Filed: April 4, 2003
    Publication date: July 1, 2004
    Inventors: Lars Gillberg, Roger Barstrom, Hannu Luhtala
  • Process for the preparation of aluminum salt solutions
    Patent number: 5904856
    Abstract: The present invention relates to a process for the preparation of solutions of aluminum salts, characterized in that an aluminate of an alkali metal and/or alkaline earth metal is dissolved in an acid solution to the formation of a solution which is used as such or is diluted to a suitable concentration.
    Type: Grant
    Filed: January 24, 1996
    Date of Patent: May 18, 1999
    Assignee: Kemira Kemi Aktiebolag
    Inventors: Magnus Kvant, Roger Barstrom