Patents by Inventor Harald Wack

Harald Wack 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).

  • Method of synthesizing optically enriched &agr;-halo-esters, and product and composition therefrom
    Patent number: 6770775
    Abstract: A method of synthesizing highly optically enriched &agr;-halo-esters comprises reacting acid halides with a cinchona alkaloid catalyst and a base to form intermediate ketenes. The ketenes are reacted with electrophilic halogenating reagents to produce &agr;-halo-esters with high enantiomeric excess. The base can be an inorganic salt. The thus-formed &agr;-halo-esters have utility in synthesizing other optically-pure materials.
    Type: Grant
    Filed: May 18, 2001
    Date of Patent: August 3, 2004
    Inventor: Harald Wack
  • Method of synthesizing optically enriched alpha-halo-esters, and product and composition therefrom
    Publication number: 20030050501
    Abstract: A method of synthesizing highly optically enriched &agr;-halo-esters comprises reacting acid halides with a cinchona alkaloid catalyst and a base to form intermediate ketenes. The ketenes are reacted with electrophilic halogenating reagents to produce &agr;-halo-esters with high enantiomeric excess. The base can be an inorganic salt. The thus-formed &agr;-halo-esters have utility in synthesizing other optically-pure materials.
    Type: Application
    Filed: May 18, 2001
    Publication date: March 13, 2003
    Inventor: Harald Wack
  • Chemical reaction vessel
    Publication number: 20020173046
    Abstract: A vessel for reacting at least two reagents consisting of a first flask section, a second flask section and a tubular section interconnecting the first and second flask sections provided with a passageway intercommunicating the interiors of the first and second flask sections.
    Type: Application
    Filed: May 18, 2001
    Publication date: November 21, 2002
    Inventors: Ahmed Hafez, Harald Wack