Patents by Inventor Herribert Neh

Herribert Neh 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 for producing 4-(heteroaryl-methyl)-halogen-1(2H)-phthalazinones
    Patent number: 6891041
    Abstract: A process for the production of 4-(heteroaryl-methyl)-halogen-1(2H)-phthalazinones, especially 4-(4-pyridylmethyl)-1(2H)-phthalazinone, is described, which is characterized by the reaction of phthalidyl-3-triphenylphosphonium salt with 4-pyridine aldehyde in the presence of a basic adjuvant, subsequent reaction with hydrazine hydrate and subsequent acid treatment, whereby this process avoids the technical safety and environmental problems of the known processes.
    Type: Grant
    Filed: December 20, 2000
    Date of Patent: May 10, 2005
    Inventors: Orlin Petrov, Thomas Heiner, Herribert Neh, Martin Kruger
  • Method for producing 4-(heteroaryl-methyl)-halogen-1(2h)-phthalazinones
    Publication number: 20040192695
    Abstract: A process for the production of 4-(heteroaryl-methyl)-halogen-1(2H)-phthalazinones, especially 4-(4-pyridylmethyl)-1(2H)-phthalazinone, is described, which is characterized by the reaction of phthalidyl-3-triphenylphosphonium salt with 4-pyridine aldehyde in the presence of a basic adjuvant, subsequent reaction with hydrazine hydrate and subsequent acid treatment, whereby this process avoids the technical safety and environmental problems of the known processes.
    Type: Application
    Filed: June 11, 2003
    Publication date: September 30, 2004
    Inventors: Orlin Petrov, Thomas Heiner, Herribert Neh, Martin Kruger