Patents by Inventor Marita Niemelä

Marita Niemelä 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 preparing 2,6-dimethylnaphthalene
    Patent number: 6472576
    Abstract: A process for producing 2,6-dimethylnapthalene from 1-(p-tolyl)-2-methylbutane, 1-(p-tolyl)-2-methylbutene or a mixture thereof by dehydrocyclization in the presence of a catalyst, comprising using non-acidic activated carbon as a catalyst.
    Type: Grant
    Filed: June 1, 2001
    Date of Patent: October 29, 2002
    Assignee: Optatech Corporation
    Inventors: Christer Bergström, Marita Niemelä