Patents by Inventor Junzo Ohtake

Junzo Ohtake 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 formaldehyde and derivatives thereof
    Patent number: 4967014
    Abstract: A process for formaldehyde production is disclosed comprising the steps of reacting methanol with formaldehyde to form methylal and then oxidizing the resulting methylal to obtain formaldehyde. Formaldehyde derivatives may also be produced. A dilute formaldehyde solution resulting from recovery of the product is recycled and used as feed material for the initial reaction step.
    Type: Grant
    Filed: February 3, 1989
    Date of Patent: October 30, 1990
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Junzo Masamoto, Junzo Ohtake, Mamoru Kawamura