Patents by Inventor Walter V. Cicha

Walter V. Cicha 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).

  • Phosgene manufacturing process
    Patent number: 6054612
    Abstract: A process for producing phosgene is disclosed which involves contacting a mixture comprising carbon monoxide and chlorine (e.g., at about 300.degree. C. or less) with carbon which (1) has a micropore to macropore ratio of 3.5 or less; (2) has a high degree of oxidative stability (i.e., loses about 16% of its weight, or less, in the WVC Temperature Test as defined herein); and (3) has a minimum surface area of at least 10 m.sup.2 /g. The use of this carbon having an active metal content of 1000 ppm or more is disclosed.
    Type: Grant
    Filed: June 16, 1999
    Date of Patent: April 25, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Walter V. Cicha, Leo Ernest Manzer