Patents by Inventor Wilhelm Gresser

Wilhelm Gresser 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 decomposition of explosive nitric acid esters dissolved in wastewaters
    Patent number: 5011614
    Abstract: A process for effecting thermal decomposition of explosive nitric acid esters in wastewater effluents of the explosives industry wherein no additional by-products are produced and wherein the danger of explosions is avoided. In this process, the dissolved esters are exposed to a temperature of between 150.degree. and 300.degree. C. under pressure lying above the boiling pressure of the wastewater. During this step, the nitric acid esters are completely decomposed, and the wastewater treated in this way can then be passed on to further processing and purification. In a preferred embodiment, the hot wastewater exiting from a decomposer unit is exploited for preheating the effluent before it enters the decomposer unit.
    Type: Grant
    Filed: April 20, 1989
    Date of Patent: April 30, 1991
    Assignee: Dynamit Nobel AG
    Inventors: Wilhelm Gresser, Klaus Schelhase, Heinz Frisch, Klaus Kaschel, Berent Reinecke, Wilhelm H. Trautmann
  • Polyvinylchloride polymer inhibited against release of hydrogen chloride at elevated temperature
    Patent number: 3966673
    Abstract: Polyvinylchloride inhibited against release of hydrogen chloride at elevated temperature is produced by polymerizing vinyl chloride in a reaction medium having finely divided calcium carbonate dispersed therein.
    Type: Grant
    Filed: July 13, 1973
    Date of Patent: June 29, 1976
    Assignee: Dynamit Nobel Aktiengesellschaft
    Inventors: Siegmund Frick, Wilhelm Gresser, Gunther Meyer, Gerhard Bier