Patents by Inventor Ari Lokio

Ari Lokio 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 preparing 4-alkyl-2-hydroxy-3,5-dichlorobenzene sulphonic acids
    Patent number: 5684183
    Abstract: The invention is related to a method for preparing 4-alkyl-2-hydroxy-3,5-dichlorobenzene sulphonic acids by sulphonating 4-chloro-3-alkylphenol and by chlorinating 4-alkyl-2-hydroxy-5-chlorobenzene sulphonic acid present in an acidic reaction mixture. According to the invention, chlorination is carried out by adding, to the acidic reaction mixture, salts of hypochlorous and/or chloric acids and, when needed, hydrochloric acid or its salt.
    Type: Grant
    Filed: July 1, 1996
    Date of Patent: November 4, 1997
    Inventors: Ari Lokio, Markku Niemi, Elias Suokas