Patents by Inventor Hans Mehner

Hans Mehner 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).

  • Gold(I) mercaptocarboxylic acid esters, method of their preparation and use
    Patent number: 5328769
    Abstract: Novel gold(I) mercaptocarboxylic acid esters of the formula (I) ##STR1## in which X is a C.sub.1 - to C.sub.3 alkylene group and Z is a group from the series tricyclo(5,2,1,0.sup.2.6)decane-8- or -9-yl or tricyclo (5,2,1,0.sup.2.6)decyl-3- or -4-methyl. These esters can be prepared from mercaptocarboxylic acid esters of the formula (II) ##STR2## and from a gold(I) chloride-dialkylsulfide complex. The novel esters can be used in gold preparations for gilding solid bases, especially ceramic materials. Compared to known gold(I) mercaptocarboxylic acid esters, the novel esters result in considerably shorter drying times for gold preparations.
    Type: Grant
    Filed: May 20, 1993
    Date of Patent: July 12, 1994
    Assignee: Degussa Aktiengesellschaft
    Inventors: Marion Lotze, Hans Mehner
  • Gold(I) mercaptocarboxylic acid esters, method of their preparation and use
    Patent number: 5312480
    Abstract: Novel gold(I) mercaptocarboxylic acid esters of the formula (I) ##STR1## in which X is a C.sub.1 - to C.sub.3 alkylene group and Z is a group from the series tricyclo(5,2,1,0.sup.2.6)decane-8- or -9-yl or tricyclo(5,2,1,0.sup.2.6)decyl-3- or -4-methyl. These esters can be prepared from mercaptocarboxylic acid esters of the formula (II) ##STR2## and from a gold(I) chloride-dialkylsulfide complex. The novel esters can be used in gold preparations for gilding solid bases, especially ceramic materials. Compared to known gold(I) mercaptocarboxylic acid esters, the novel esters result in considerably shorter drying times for gold preparations.
    Type: Grant
    Filed: April 5, 1993
    Date of Patent: May 17, 1994
    Assignee: Degussa Aktiengesellschaft
    Inventors: Marion Lotze, Hans Mehner
  • Gold(I) mercaptocarboxylic acid esters, method of their preparation and use
    Patent number: 5235079
    Abstract: Novel gold(I) mercaptocarboxylic acid esters of the formula (I) ##STR1## in which X is a C.sub.1 -- to C.sub.3 alkylene group and Z is a group from the series tricyclo(5,2,1,0.sup.2.6)decane-8- or -9-yl or tricyclo (5,2,1,0.sup.2.6)decyl-3- or -4-methyl. These esters can be prepared from mercaptocarboxylic acid esters of the formula (II) ##STR2## and from a gold(I) chloride-dialkylsulfide complex. The novel esters can be used in gold preparations for gilding solid bases, especially ceramic materials. Compared to known gold(I) mercaptocarboxylic acid esters, the novel esters result in considerably shorter drying times for gold preparations.
    Type: Grant
    Filed: December 16, 1991
    Date of Patent: August 10, 1993
    Assignee: Degussa Aktiengesellschaft
    Inventors: Marion Lotze, Hans Mehner
  • Glossy, precious-metal preparations for microwave-resistant tableware-decorations
    Patent number: 4992098
    Abstract: Glossy precious-metal preparations containing of one or more organo-precious-metal compounds, an organic carrier and a fluxing agent composed of organic metal compounds are used for microwave-resistant decorations on silicate tableware, the fluxing agent contains an organic silicon compound with three hydrolyzable groups at the silicon atom in a proportion of 0.1 to 2 moles of silicon per mole of precious metal.
    Type: Grant
    Filed: October 4, 1988
    Date of Patent: February 12, 1991
    Assignee: Degusssa Aktiengesellschaft
    Inventors: Marion Lotze, Hans Mehner, Peter Kleinschmit