Patents by Inventor Guenter Schmidt

Guenter Schmidt 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).

  • Monophosphoric acid esters of hydroxy alkyl urea compounds
    Patent number: 4041110
    Abstract: Scale formation as well as deposition of incrustations in aqueous systems are prevented by the addition of a monophosphoric acid ester of a hydroxy alkyl urea compound or of salts of such an ester. Preferred esters of this type are the esters obtained by reacting hydroxyl alkyl urea compounds with urea phosphate. The esters are highly effective even when they are added in substoichiometric amounts calculated with respect to the scale and hardness causing compounds present in aqueous systems.
    Type: Grant
    Filed: November 7, 1975
    Date of Patent: August 9, 1977
    Assignee: Joh. A. Benckiser GmbH
    Inventors: Friedrich Krueger, Guenter Schmidt