Patents by Inventor Hans Buchwald

Hans Buchwald 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).

  • Difluorotetrachloroethane mixtures and their use in removing waxes
    Patent number: 4906304
    Abstract: New mixtures comprising difluorotetrachloroethane and petroleum ethers are described for use, inter alia, as solvents, particularly for waxes.
    Type: Grant
    Filed: January 27, 1988
    Date of Patent: March 6, 1990
    Assignee: Kali-Chemie Aktiengesellschaft
    Inventors: Hans Buchwald, Boleslaus Raschkowski, Dieter Singer
  • Solvent mixture containing 2,2,2-trifluoroethanol for use as a cleaning composition
    Patent number: 4770714
    Abstract: Solvent mixtures of 2,2,2,-trifluoroethanol and halogenated hydrocarbons containing 1 to 3 carbon atoms or polyfluorinated aromatic hydrocarbons in a weight ratio of from 1:90 to 99:1, and optional additive alcohols and/or stabilizers, and uses of such mixtures in cleaning processes, vapor degreasing, removal of adsorbed water from the surfaces of solid objects, and as working fluids for a Rankine process or heat pump.
    Type: Grant
    Filed: March 16, 1987
    Date of Patent: September 13, 1988
    Assignee: Kali-Chemie Aktiengesellschaft
    Inventors: Hans Buchwald, Boreslaus Raschkowski, Dieter Singer
  • Process for producing novel products by hydrogen fluoride with esters of fatty acids
    Patent number: 4746463
    Abstract: A process is disclosed for reacting hydrogen fluoride with a fatty acid ester having a melting point less than than 60.degree. C. The resulting products and various applications for them as lubricants, lubricant additives and pharmaceutical carriers are also described.
    Type: Grant
    Filed: December 9, 1986
    Date of Patent: May 24, 1988
    Assignee: Kali-Chemie Aktiengesellschaft
    Inventors: Heinz-Rudi Feist, Hans Buchwald, Boleslaus Raschkowski, Werner Rudolph
  • Process for producing novel products by hydrogen fluoride with esters of fatty acids
    Patent number: 4659493
    Abstract: A process is disclosed for reacting hydrogen fluoride with a fatty acid ester having a melting point less than than 60.degree. C. The resulting products and various applications for them as lubricants, lubricant additives and pharmaceutical carriers are also described.
    Type: Grant
    Filed: September 28, 1984
    Date of Patent: April 21, 1987
    Assignee: Kali-Chemie Aktiengesellschaft
    Inventors: Heinz-Rudi Feist, Hans Buchwald, Boleslaus Raschkowski, Werner Rudolph
  • Process for the chip forming, cutting or abrasive working of metals
    Patent number: 4492641
    Abstract: A process for chip forming, cutting or abrasive treatment of metals using a fluorochlorohydrocarbon containing cooling lubricant is described. The lubricant contains esters of long chain carboxylic acids and monoalcohols having a total of 34 to 50 carbon atoms or derivatives of said esters. Also disclosed is a cooling lubricant to be used in the process and a process for the preparation of such a cooling lubricant.
    Type: Grant
    Filed: November 30, 1983
    Date of Patent: January 8, 1985
    Assignee: Kali-Chemie AG
    Inventors: Hans Buchwald, Boleslaus Raschkowski