Patents by Inventor Lothar Kuhnert

Lothar Kuhnert 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).

  • Patent number: 6528611
    Abstract: The method for forming a finely divided polymerizate in the form of a dispersion (D) of particles (50, 51) for the purpose of manufacturing powder lacquers or fiber compound materials comprises two steps: 1) In a first step a solution (S1) of a polymer (P), which is dissolved in a first liquid (L1), is emulsified in a second liquid (L2). The polymer is not soluble in the second liquid. The first liquid has a lower boiling point than the second and it is soluble in the second only to a limited extent. Owing to the limited solubility the polymer remains dissolved in the droplets which arise during the emulsification. Under the influence of mechanical means—in particular of a high speed stirring apparatus (31, 32)—and by shear forces caused by the latter, droplets are formed, the average diameter (d) of which corresponds to one of the named uses and is preferably less than 0.03 mm.
    Type: Grant
    Filed: October 11, 2001
    Date of Patent: March 4, 2003
    Assignee: Arova Schaffhausen AG
    Inventors: Albert Maria Vodermayer, Lothar Kuhnert
  • Publication number: 20020045725
    Abstract: The method for forming a finely divided polymerizate in the form of a dispersion (D) of particles (50, 51) for the purpose of manufacturing powder lacquers or fiber compound materials comprises two steps:
    Type: Application
    Filed: October 11, 2001
    Publication date: April 18, 2002
    Applicant: Sulzer Markets and Technology AG
    Inventors: Albert Vodermayer, Lothar Kuhnert
  • Patent number: 5888580
    Abstract: Continuous process for producing unidirectionally reinforced composite materials by impregnating a continuous reinforcing fiber strand with a thermoplastic matrix in an impregnating bath containing a dispersion of a thermoplastic powder by measuring the width of the strand leaving the impregnating bath and using this measured value for regulating the polymer concentration in the impregnating bath.
    Type: Grant
    Filed: October 23, 1997
    Date of Patent: March 30, 1999
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Georg Hinrichsen, Albert Vodermayer, Karl-Heinz Reichert, Lothar Kuhnert, Wolfgang Lindner, Gerd Goldmann
  • Patent number: 4419440
    Abstract: The present invention relates to a process for the introduction of water-insoluble photographic additives, especially dye couplers, in aqueous media with the application of high-boiling organic solvents. The purpose of the invention is to develop an improved process for the introduction of hydrophobic photographic additives, especially dye couplers, in gelatin or other hydrophilic bonding agents in order to produce stable dispersions suitable for storage. This invention has the object of creating a new, high-boiling solvent for the dispersion of hydrophobic photographic additives. According to the invention, this aim is achieved by employing phosphonic acid diamides, methane bisphosphonic acid diamides, phosphonic acid esters, methane bisphosphonic acid esters or mixed phosphonic acid esters or methane bisphosphonic acid ester amides as high-boiling solvents.
    Type: Grant
    Filed: November 9, 1981
    Date of Patent: December 6, 1983
    Assignee: VEB Filmfabrik Wolfen
    Inventors: Lothar Kuhnert, Burkhard Costisella, Christoph Roth, Walter Kroha, Wolfgang Baumbach, Renate Hoppe
  • Patent number: 4410624
    Abstract: The invention relates to a process of dispersing oil-soluble photographic additives having a silver-halide base for information recording materials.According to the invention, compounds of the following general formula: ##STR1## are used as auxiliary dispersing agents. The symbolsR represents hydrogen, alkyl with 1 to 8 C atoms,M represents hydrogen, alkali metal, ammonium, andX represents OR or SO.sub.3 M.
    Type: Grant
    Filed: March 26, 1982
    Date of Patent: October 18, 1983
    Assignee: VEB Filmfabrik Wolfen
    Inventors: Dieter Plaschnick, Christoph Roth, Bernd Noll, Walter Kroha, Lothar Kuhnert