Patents by Inventor Naokato Yokoyama, deceased

Naokato Yokoyama, deceased 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).

  • Heteroacetic acid derivatives
    Patent number: 5569674
    Abstract: Disclosed are compounds of formula ##STR1## wherein R is hydroxy, esterified hydroxy or etherified hydroxy;R.sub.1 is halogen, trifluoromethyl or lower alkyl;R.sub.2 is halogen, trifluoromethyl or lower alkyl;R.sub.3 is halogen, trifluoromethyl, lower alkyl, aryl, aryl-lower alkyl, cycloalkyl or cycloalkyl-lower alkyl; orR.sub.3 is the radical ##STR2## wherein R.sub.8 is hydrogen, lower alkyl, aryl, cycloalkyl, aryl-lower alkyl or cycloalkyl-lower alkyl; R.sub.9 is hydroxy or acyloxy; R.sub.10 represents hydrogen or lower alkyl; or R.sub.9 and R.sub.10 together represent oxo;R.sub.4 is hydrogen, halogen, trifluoromethyl or lower alkyl;X is --NR.sub.7, S or O;W is O or S;R.sub.5 represents hydrogen, lower alkyl or aryl-lower alkyl; andR.sub.6 represents hydrogen; orR.sub.5 and R.sub.6 together represent oxo provided that X represents --NR.sub.7 ;R.sub.
    Type: Grant
    Filed: December 16, 1994
    Date of Patent: October 29, 1996
    Assignee: Ciba-Geigy Corporation
    Inventors: Naokato Yokoyama, deceased, Gordon N. Walker, Alan J. Main