Patents by Inventor Ludger Stubbs

Ludger Stubbs 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).

  • SYNTHESIS OF DIACIDS
    Publication number: 20150183703
    Abstract: The invention relates to a process for preparing a dicarboxylic acid comprising the steps: (a) heating a lactone in the presence of a first catalyst system to produce an alkenoic acid; and (b) contacting the alkenoic acid with carbon monoxide, water and a second catalyst system to produce a reaction composition comprising the second catalyst system and the dicarboxylic acid.
    Type: Application
    Filed: March 28, 2012
    Publication date: July 2, 2015
    Applicant: Agency for Science, Technology and Research
    Inventors: Pui Kwan Wong, Chuanzhao Li, Ludger Stubbs, Martin Van Meurs, Daniel Gait Anak Kumbang, Sharon Chun Yan Lim, Eite Drent
  • PROCESS TO PRODUCE A DIENE FROM A LACTONE
    Publication number: 20150133685
    Abstract: The invention provides a process for the production of a diene. In the process, a lactone is heated in the presence of a first catalyst system to produce an alkene and carbon dioxide and the alkene is contacted with a second catalyst system to produce an alkyldiene.
    Type: Application
    Filed: March 28, 2013
    Publication date: May 14, 2015
    Applicant: Agency for Science, Technology and Research
    Inventors: Ludger Stubbs, Chuanzhao Li, Pui Kwan Wong, Martin van Meurs