Patents by Inventor Reijo Johannes Backstrom

Reijo Johannes Backstrom 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 the preparation of 3,4-dihydroxy-5-nitrobenzaldehyde
    Patent number: 5710343
    Abstract: The invention provides a method for the preparation of 3,4-dihydroxy-5-nitrobenzaldehyde by reacting 3-ethoxy-4-hydroxy-5-nitrobenzaldehyde with a reagent comprising zinc chloride, water and hydrogen chloride.
    Type: Grant
    Filed: May 8, 1997
    Date of Patent: January 20, 1998
    Assignee: Orion-Yhtyma Oy
    Inventor: Reijo Johannes Backstrom