Patents by Inventor Mechthild Borgerding

Mechthild Borgerding 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).

  • 5,6-Dihydroxyindolines as additives for hair dyeing preparations
    Patent number: 6878170
    Abstract: The invention concerns the use of indoline derivatives of formula (I): in which R1, R2, R3, R4 and R5 independently of one another represent hydrogen or C1-4 alkyl groups, or R4 and R5 together with the oxygen atoms to which they are attached represent a C1-4 alkylenedioxy group, or of salts of such indoline derivatives, as additives to hair dyeing agents of the direct dyeing or primary intermediate/secondary intermediate type, thus producing hair dyeing with excellent color fastness characteristics.
    Type: Grant
    Filed: April 15, 2003
    Date of Patent: April 12, 2005
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Iduna Matzik, Detlef Hollenberg, Mechthild Borgerding
  • 5,6-Dihydroxyindolines as additives for hair dyeing preparations
    Publication number: 20030208857
    Abstract: The invention concerns the use of indoline derivatives of formula (I): 1
    Type: Application
    Filed: April 15, 2003
    Publication date: November 13, 2003
    Inventors: Iduna Matzik, Detlef Hollenberg, Mechthild Borgerding
  • 5,6-dihydroxyindolines as additives for hair dyeing preparations
    Patent number: 6569211
    Abstract: The invention concerns the use of indoline derivatives of formula (I): in which R1, R2, R3, R4 and R5 independently of one another represent hydrogen or C1-4 alkyl groups, or R4 and R5 together with the oxygen atoms to which they are attached represent a C1-4 alkylenedioxy group, or of salts of such indoline derivatives, as additives to hair dyeing agents of the direct dyeing or primary intermediate/secondary intermediate type, thus producing hair dyeing with excellent color fastness characteristics.
    Type: Grant
    Filed: October 12, 2001
    Date of Patent: May 27, 2003
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Iduna Matzik, Detlef Hollenberg, Mechthild Borgerding
  • 5,6-dihydroxyindolines as additives for hair dyeing preparations
    Publication number: 20020032938
    Abstract: The invention concerns the use of indoline derivatives of formula (I): 1
    Type: Application
    Filed: October 12, 2001
    Publication date: March 21, 2002
    Inventors: Iduna Matzik, Detlef Hollenberg, Mechthild Borgerding