Patents by Inventor Dennis M. Roland

Dennis M. Roland 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).

  • Indolyl substituted hydroxylamine derivatives
    Patent number: 5350761
    Abstract: Disclosed are the compound of the formula ##STR1## wherein R represents hydrogen, lower alkyl, aryl, biaryl, C.sub.3 -C.sub.7 -cycloalkyl, aryl-lower alkyl, aryl-lower alkenyl, aryl-lower alkynyl, aryloxy-lower alkyl, arylthio-lower alkyl, C.sub.3 -C.sub.7 -cycloalkyl-lower alkyl, biaryl-lower alkyl, aryl-C.sub.3 -C.sub.7 -cycloalkyl, aryl-C.sub.3 -C.sub.7 -cycloalkyl-lower alkyl or aryloxy-aryl-lower alkyl; and aryl represents carbocyclic or heterocyclic aryl;Z represents C.sub.1 -C.sub.3 -alkylene or vinylene, each unsubstituted or substituted by lower alkyl;Y represents SO.sub.2 (sulfonyl) or CO (carbonyl);A represents O (oxygen), S (sulfur), or a direct bond;B represents lower alkylene; or B represents lower alkenylene provided that A represents a direct bond;X represents oxygen or sulfur,R.sub.
    Type: Grant
    Filed: July 30, 1993
    Date of Patent: September 27, 1994
    Assignee: Ciba-Geigy Corporation
    Inventors: John H. Van Duzer, Dennis M. Roland
  • Isoquinolyl substituted hydroxylamine derivatives
    Patent number: 5334600
    Abstract: The compounds of the formula ##STR1## wherein R represents hydrogen, lower alkyl, aryl, biaryl, C.sub.3 -C.sub.7 -cycloalkyl, aryl-lower alkyl, aryl-lower alkenyl, aryl-lower alkynyl, aryloxy-lower alkyl, arylthio-lower alkyl, C.sub.3 -C.sub.7 -cycloalkyl-lower alkyl, biaryl-lower alkyl, aryl-C.sub.3 -C.sub.7 -cycloalkyl, aryl-C.sub.3 -C.sub.7 -cycloalkyl-lower alkyl or aryloxy-aryl-lower alkyl; and aryl represents carbocyclic or heterocyclic aryl; Z represents C.sub.1 -C.sub.3 -alkylene or vinylene, each unsubstituted or substituted by lower alkyl; Y represents SO.sub.2 (sulfonyl) or CO (carbonyl); A represents .sub.0 (oxygen), S (sulfur), or a direct bond; B represents lower alkylene; or B represents lower alkenylene or lower alkynylene provided that A represents a direct bond; X represents oxygen or sulfur, R.sub.
    Type: Grant
    Filed: February 1, 1993
    Date of Patent: August 2, 1994
    Assignee: Ciba-Geigy Corporation
    Inventors: John H. Van Duzer, Dennis M. Roland
  • Isoquinolyl substituted hydroxylamine derivatives
    Patent number: 5260316
    Abstract: The compounds of the formula ##STR1## wherein R represents hydrogen, lower alkyl, aryl, biaryl, C.sub.3 -C.sub.7 -cycloalkyl, aryl-lower alkyl, aryl-lower alkenyl, aryl-lower alkynyl, aryloxy-lower alkyl, arylthio-lower alkyl; C.sub.3 -C.sub.7 -cycloalkyl-lower alkyl, biaryl-lower alkyl, aryl-C.sub.3 -C.sub.7 -cycloalkyl, aryl-C.sub.3 -C.sub.7 -cycloalkyl-lower alkyl or aryloxy-aryl-lower alkyl; and aryl represents carbocyclic or heterocyclic aryl; Z represents C.sub.1 -C.sub.3 -alkylene or vinylene, each unsubstituted or substituted by lower alkyl; Y represents SO.sub.2 or CO; A represents O, S, or a direct bond; B represents lower alkylene; or B represents lower alkenylene provided that A represents a direct bond; X represents oxygen or sulfur; R.sub.
    Type: Grant
    Filed: June 3, 1992
    Date of Patent: November 9, 1993
    Assignee: Ciba-Geigy Corporation
    Inventors: John H. Van Duzer, Dennis M. Roland