Patents by Inventor Wilhelm Friedrich

Wilhelm Friedrich 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).

  • Alcohols having 3-methyl or 3,5-dimethyl or 3,5-dimethylphenyl groups, a process for their preparation and a fragrance composition containing same
    Patent number: 4968668
    Abstract: 2-Methyl-3-(3-methylphenyl)-propan-1-ol, 2-methyl-3-(3,5-dimethylphenyl)-propan-1-ol, 1-(3-methylphenyl)-2-methylbutan-3-ol and 1-(3,5-dimethylphenyl)-2-methylbutan-3-ol, their preparation and use as fragrances.
    Type: Grant
    Filed: August 7, 1989
    Date of Patent: November 6, 1990
    Assignee: Consortium fur Elektrochemische Industrie GmbH
    Inventors: Walter Hafner, Walter Gebauer, Marlies Regiert, Wilhelm Friedrich, Erich Markl
  • Alcohols containing 2-methylphenyl or 2-methoxyphenyl groups, and fragrances containing same
    Patent number: 4849401
    Abstract: The invention discloses compounds of the general formula ##STR1## in which R represents a methyl radical or a methoxy radical when R.sup.1 is a hydrogen atom; orR represents a methyl radical when R.sup.1 is a methyl radical.The compounds of the invention are useful as fragrances.
    Type: Grant
    Filed: April 6, 1988
    Date of Patent: July 18, 1989
    Assignee: Consortium fur elektrochemische Industrie, GmbH
    Inventors: Wilhelm Friedrich, Helmut Gebauer, Walter Hafner, Marlies Regiert
  • Greases prepared from organosiloxanes with SiC-bonded groups
    Patent number: 4405469
    Abstract: This invention relates to organosiloxanes which have SiC-bonded ester groups and contain at least one unit of the general formula: ##EQU1## is which R represents the same or different monovalent hydrocarbon radicals having from 1 to 12 carbons atoms, which are free of aliphatic unsaturation and which may contain one ether oxygen atom; R' represents hydrogen or a methyl group (CH.sub.3) and a is O, 1 or 2. These organosiloxanes can be prepared by hydrolyzing or co-hydrolyzing silanes of the general formula:ROOCCH.sub.2 CH(COOR)CH.sub.2 CHR'CH.sub.2 Si(CH.sub.3).sub.a X.sub.3-a'where R, R' and a are the same as above and X represents the same or different hydrolyzable atoms or groups. Also, they may be prepared by the addition of a diester of allyl succinic acid and/or methallyl succinic acid to an organosiloxane containing Si-bonded hydrogen. These new organosiloxanes may be used as lubricants for inorganic and organic fibers, metal surfaces and as hydraulic fluids.
    Type: Grant
    Filed: July 27, 1981
    Date of Patent: September 20, 1983
    Assignee: Consortium fur Elektrochemische Ind. GmbH
    Inventors: Walter Hafner, Erich Markl, Ludwig Eibel, Gerhard Kreis, Dietrich Samrowski, Manfred Wick, Bernward Deubzer, Wilhelm Friedrich
  • Organosiloxanes with SiC-bonded groups and a process for preparing the same
    Patent number: 4322473
    Abstract: This invention relates to organosiloxanes which have SiC-bonded ester groups and contain at least one unit of the general formula: ##EQU1## in which R represents the same or different monovalent hydrocarbon radicals having from 1 to 12 carbon atoms, which are free of aliphatic unsaturation and which may contain one ether oxygen atom; R' represents hydrogen or a methyl group (CH.sub.3) and a is 0, 1 or 2. These organosiloxanes can be prepared by hydrolyzing or co-hydrolyzing silanes of the general formula:ROOCCH.sub.2 CH(COOR)CH.sub.2 CHR'CH.sub.2 Si(CH.sub.3).sub.a X.sub.3-a,where R, R' and a are the same as above and X represents the same or different hydrolyzable atoms or groups. Also, they may be prepared by the addition of a diester of allyl succinic acid and/or methallyl succinic acid to an organosiloxane containing Si-bonded hydrogen. These new organosiloxanes may be used as lubricants for inorganic and organic fibers, metal surfaces and as hydraulic fluids.
    Type: Grant
    Filed: August 20, 1979
    Date of Patent: March 30, 1982
    Assignee: Consortium fur Elektrochemische Industrie GmbH
    Inventors: Walter Hafner, Erich Markl, Ludwig Eibel, Gerhard Kreis, Dietrich Samrowski, Manfred Wick, Bernward Deubzer, Wilhelm Friedrich
  • Organosiloxanes with SiC-bonded groups and a process for preparing the same
    Patent number: 4207246
    Abstract: This invention relates to organosiloxanes which have SiC-bonded ester groups and contain at least one unit of the general formula:ROOCCH.sub.2 CH(COOR)CH.sub.2 CHR'CH.sub.2 Si(CH.sub.3).sub.a O.sub.3-a/2in which R represents the same or different monovalent hydrocarbon radicals having from 1 to 12 carbon atoms, which are free of aliphatic unsaturation and which may contain one ether oxygen atom; R' represents hydrogen or a methyl group (CH.sub.3) and a is 0, 1 or 2. These organosiloxanes can be prepared by hydrolyzing or co-hydrolyzing silanes of the general formula:ROOCCH.sub.2 CH(COOR)CH.sub.2 CHR'CH.sub.2 Si(CH.sub.3).sub.a X.sub.3-a,where R, R' and a are the same as above and X represents the same or different hydrolyzable atoms or groups. Also, they may be prepared by the addition of a diester of allyl succinic acid and/or methallyl succinic acid to an organosiloxane containing Si-bonded hydrogen.
    Type: Grant
    Filed: February 26, 1979
    Date of Patent: June 10, 1980
    Assignee: Consortium f/ur Elektrochemische Industrie GmbH
    Inventors: Walter Hafner, Erich Markl, Ludwig Eibel, Gerhard Kreis, Dietrich Samrowski, Manfred Wick, Bernward Deubzer, Wilhelm Friedrich