Patents by Inventor John M Maher

John M Maher 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 oxidation of alkanes
    Patent number: 6492548
    Abstract: Processes are disclosed for the oxidation of alkanes such as, for example, propane, to form unsaturated carboxylic aldehydes and acids such as, for example, acrolein and acrylic acid. The processes utilize oxygen and recycle alkanes, e.g. propane, to the aldehyde reactor. The presence of the alkane-to-aldehyde reaction can enhance the efficiency of the processes.
    Type: Grant
    Filed: September 20, 2000
    Date of Patent: December 10, 2002
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Jonathan L Brockwell, Mark A Young, William G Etzkorn, Barbara K Warren, John M Maher
  • Processes for the manufacture of methylmercaptopropanal
    Patent number: 6057481
    Abstract: Processes are disclosed for the conversion of propylene to methylmercaptopropanal by converting propylene to acrolein and converting acrolein to methylmercaptopropanal. The processes utilize oxygen and recycle propane to the acrolein reactor. Process feeds can comprise, propane, propylene or mixtures thereof. The presence of propane in the propylene-to-acrolein reaction can enhance the efficiency of the processes.
    Type: Grant
    Filed: October 1, 1998
    Date of Patent: May 2, 2000
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Jonathan L Brockwell, Mark A Young, William G Etzkorn, Barbara K Warren, John M Maher