Patents by Inventor Carl Finger

Carl Finger 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 the production of fluorenone by catalytic oxidation of fluorene
    Patent number: 4218400
    Abstract: An improved process for the production of pure fluorenone by oxidation of fluorene with air or oxygen at ambient temperature in the presence of a quaternary salt, the improvement comprising carrying out the reaction in a suspension of fluorene or a fluorene-containing fraction in an aprotic immiscible with water solvent, such as a .alpha.-methyl naphthalene, which contains and is primed with a 30%-60% aqueous alkali metal hydroxide solution, and intimately mixing the organic and aqueous phases during the reaction.
    Type: Grant
    Filed: January 30, 1978
    Date of Patent: August 19, 1980
    Assignee: Rutgerswerke Aktiengesellschaft
    Inventor: Carl Finger