Patents Examined by M. Siegel
  • Macrocyclic polyethers
    Patent number: 4072693
    Abstract: Macrocyclic polyethers, their preparation, complexes of these macrocyclic polyethers and their preparation are described.
    Type: Grant
    Filed: March 5, 1976
    Date of Patent: February 7, 1978
    Assignee: Shell Oil Company
    Inventors: David N. Reinhoudt, Robin T. Gray
  • Phosphoramidates and thiophosphoramidates as pesticides
    Patent number: 4071533
    Abstract: Compounds of the formula ##STR1## and X is hydrogen, halo, alkyl, cyano or nitro, Y is oxygen or sulfur and R is lower alkyl, have been found to be excellent pesticides.
    Type: Grant
    Filed: March 11, 1976
    Date of Patent: January 31, 1978
    Assignee: Abbott Laboratories
    Inventors: Robert George Stein, Terry Lee Couch
  • Synthesis of biotin
    Patent number: 4062868
    Abstract: A novel process for the preparation of biotin is disclosed wherein said process employs inexpensive starting materials and reagents resulting in the obtention of biotin devoid of the biologically inactive stereoisomers.
    Type: Grant
    Filed: February 23, 1977
    Date of Patent: December 13, 1977
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Pasquale Nicholas Confalone, Elizabeth Dianne Lollar, Giacomo Pizzolato, Milan Radoje Uskokovic