Patents by Inventor Douglas Clifford Brown

Douglas Clifford Brown 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).

  • Patent number: 5780635
    Abstract: A base synthesis process and catalyst for the preparation of pyridine or its alkylpyridine derivatives involving the catalytic reaction of one or more aldehydes and/or ketones containing from one to about five carbon atoms, with at least one reactant having more than one carbon atom, with ammonia in the gas phase. The catalyst comprises an effective amount of a large-pore zeolite having been prepared with a silica to alumina ratio of at least 15, and at least a first dimension having first channels formed by twelve-membered rings, and a second dimension having second channels formed by ten- or twelve-membered rings which intersect the first channels. The preferred zeolite is a zeolite having the structure of zeolite beta.
    Type: Grant
    Filed: June 21, 1996
    Date of Patent: July 14, 1998
    Assignee: Reilly Industries, Inc.
    Inventors: Colin Hugh McAteer, Douglas Clifford Brown, Robert Drummond Davis, Sr.