Patents by Inventor Sigurd Rosinger

Sigurd Rosinger 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).

  • Preparation of polychlorcyclopentane and hexachlorcyclopentadiene
    Patent number: 3948742
    Abstract: Polychlorcyclopentane and hexachlorcyclopentadiene are prepared by reacting liquid chlorinated cyclopentane with gaseous chlorine in the presence of an electromagnetic radiation and optionally by a subsequent reaction of these higher chlorinated cyclopentanes with chlorine at a temperature of more than 300.degree.C to yield hexachlorcyclopentadiene.
    Type: Grant
    Filed: December 16, 1971
    Date of Patent: April 6, 1976
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Sigurd Rosinger, Heinz Boesenberg, Adolf Gaube
  • Process for the preparation of ethane-1,2-diphosphinic acid diesters
    Patent number: 3939050
    Abstract: A process for the preparation of ethane-1,2-diphosphinic acid diesters of the formula ##EQU1## where R.sub.1 represents alkyl, phenyl and/or phenalkyl groups having from 1 to 18 carbon atoms and R.sub.2 alkyl groups having from 1 to 18 carbon atoms, which may be optionally substituted by halogen atoms, which comprises reacting phosphonous acid esters of the formula ##EQU2## where R.sub.1 and R.sub.2 are as defined above, with acetylene using high-energy irradiation.
    Type: Grant
    Filed: January 17, 1974
    Date of Patent: February 17, 1976
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hans-Jerg Kleiner, Sigurd Rosinger