Patents by Inventor Melissa J. Williams

Melissa J. Williams 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 obtaining fragrant ketone
    Patent number: 6423874
    Abstract: A process for obtaining Ketone of formula 1a,b, which includes contacting a Ketone represented by formula 2a,b with a first catalyst under conditions and for a time sufficient to obtain an intermediate mixture, which intermediate mixture contains a Ketone represented by formula 4a,b; and contacting the intermediate mixture, or a fraction thereof, with a second catalyst under conditions effective to provide a product containing a Ketone of formula 1a,b. Moreover, the first catalyst preferably differs from the second catalyst with the first catalyst preferably being an isomerization catalyst and the second catalyst being a cyclization catalyst. The process is capable of providing unexpectedly incresased yields of both Ketone 4 and Ketone 1.
    Type: Grant
    Filed: February 18, 2000
    Date of Patent: July 23, 2002
    Assignee: Millennium Speciality Chemicals, Inc.
    Inventors: Mark B. Erman, Melissa J. Williams, Carlos G. Cárdenas
  • Process for obtaining nitriles
    Patent number: 6114565
    Abstract: A process for obtaining a nitrile represented by formula RCN, comprising contacting a corresponding aldehyde represented by formula RCHO with (i) ammonia or ammonium hydroxide, and (ii) hydrogen peroxide, in the presence of a transition metal or a transition metal compound.
    Type: Grant
    Filed: September 3, 1999
    Date of Patent: September 5, 2000
    Assignee: Millennium Specialty Chemicals
    Inventors: Mark B. Erman, Joe W. Snow, Melissa J. Williams