Patents by Inventor Astrid Walther

Astrid Walther 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).

  • Merocyanine derivatives
    Patent number: 7790769
    Abstract: Disclosed are merocyanine derivatives of formula (1), wherein R1 and R2 independently from each other are branched C4-C22alkyl; or branched C4-C12 alkenyl; R3 and R4 independently from each other are cyano; COR7, COOR7; CONR7R8; SO2(C6-C12)aryl; C2-C12alk-1-enyl; C3-C12cycloalk-1-enyl; C2-C12alk-1-inyl; C2-C12heteroalkyl; C3-C5heterocycloalkyl; C6-C10aryl; or C1-C9heteroaryl; wherein at least one of R3 and R4 is cyano; R5 and R6 independently from each other are hydrogen; C1-C6alkyl; C5-C8cycloalkyl which may be substituted by one or more than one C1-C4alkyl; and R7 and R8 independently from each other are hydrogen; C1-C22alkyl; C2-C12alkenyl; C2-C12alkinyl; C3-C12cycloalkyl; C3-C12cycloalkenyl; —(CH2)tCOOH; C7-C12aralkyl; C1-C12heteroalkyl; C2-C11heteroaralkyl; C6-C10aryl; C1-C9heteroaryl. The compounds are useful as UV absorbers for protecting human hair and skin against the damaging effect of UV radiation.
    Type: Grant
    Filed: December 11, 2006
    Date of Patent: September 7, 2010
    Assignee: Ciba Corporation
    Inventors: Barbara Wagner, Astrid Walther, Bernd Herzog
  • Merocyanine Derivatives
    Publication number: 20090169495
    Abstract: Disclosed are merocyanine derivatives of formula (1), wherein R1 and R2 independently from each other are branched C4-C22alkyl; or branched C4-C12 alkenyl; R3 and R4 independently from each other are cyano; COR7, COOR7; CONR7R8; SO2(C6-C12)aryl; C2-C12alk-1-enyl; C3-C12cycloalk-1-enyl; C2-C12alk-1-inyl; C2-C12heteroalkyl; C3-C5heterocycloalkyl; C6-C10aryl; or C1-C9heteroaryl; wherein at least one of R3 and R4 is cyano; R5 and R6 independently from each other are hydrogen; C1-C6alkyl; C5-C8cycloalkyl which may be substituted by one or more than one C1-C4alkyl; and R7 and R8 independently from each other are hydrogen; C1-C22alkyl; C2-C12alkenyl; C2-C12alkinyl; C3-C12cycloalkyl; C3-C12cycloalkenyl; —(CH2)tCOOH; C7-C12aralkyl; C1-C12heteroalkyl; C2-C11heteroaralkyl; C6-C10aryl; C1-C9heteroaryl. The compounds are useful as UV absorbers for protecting human hair and skin against the damaging effect of UV radiation.
    Type: Application
    Filed: December 11, 2006
    Publication date: July 2, 2009
    Inventors: Barbara Wagner, Astrid Walther, Bernd Herzog