Patents by Inventor Lucius Werthemann

Lucius Werthemann 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 the production of deoxy-alpha-acids
    Patent number: 4101585
    Abstract: Preparation of deoxy-.alpha.-acids (deoxyhumulons) by prenylation of the corresponding acylphloroglucinols under alkaline conditions, whereby prenylation is performed in a mixture of water and an organic solvent immiscible with water, in the presence of a phase-transfer catalyst.
    Type: Grant
    Filed: August 30, 1976
    Date of Patent: July 18, 1978
    Assignee: Ciba-Geigy Corporation
    Inventors: Urs Burckhardt, Lucius Werthemann, Richard Josef Troxler
  • Chelating agents
    Patent number: 3994966
    Abstract: Chelating agents having in addition to their metal sequestering groups a functional group capable of reacting with bio-organic molecules are disclosed, in particular, substituted ethylenedinitrilotetraacetic acids such as 1-p-nitrophenylethylenedinitrilotetraacetic acid, 1-p-aminophenylethylenedinitrilotetraacetic acid and their derivatives are disclosed. These compounds are effective chelating agents and in addition are useful in the perturbed angular correlation method of studying molecular behavior.
    Type: Grant
    Filed: September 28, 1972
    Date of Patent: November 30, 1976
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Michael W. Sundberg, Claude F. Meares, Lucius Werthemann