Patents by Inventor George W. Gokel

George W. Gokel 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).

  • Reversible, electrochemically-switched lariat ethers
    Patent number: 4631119
    Abstract: This invention relates to novel heteromacrocyclic compounds which have electrochemically reducible sidearms containing uncharged Lewis basic donor groups appropriately placed to interact with a macroring-bound cation and an electrochemical switching process utilizing same. Reduction of the sidearm's aromatic residue produces a radical anion species. The resulting ligand binds a cation more strongly than does the neutral species. These compounds are therefore of utility as electrochemically controlled cation binders.
    Type: Grant
    Filed: May 22, 1985
    Date of Patent: December 23, 1986
    Assignee: W. R. Grace & Co.
    Inventors: George W. Gokel, Luis Echegoyen
  • Process for the direct preparation of N,N-disubstituted derivatives for 4,13-diaza-18-crown-6
    Patent number: 4597903
    Abstract: A process for the direct preparation of N,N-disubstituted derivatives of 4,13-diaza-18-crown-6 in which the substituents on both nitrogen atoms are identical and derive originally from an amine, by reacting a 1,8-diiodo-3,6-dioxooctane or derivatives thereof in which the substituents are located on positions 1, 2, 4, 5, 7 or 8 or combinations thereof, with a molar equivalent of a primary amine in the presence of a base and solvent.
    Type: Grant
    Filed: August 21, 1984
    Date of Patent: July 1, 1986
    Assignee: University of Maryland
    Inventors: George W. Gokel, Vincent J. Gatto
  • Crown ether compositions with sidearms affording enhanced cation binding
    Patent number: 4474963
    Abstract: This invention relates to novel crown ether compositions which have been given the cognomen "lariat ethers". They have been designed with one or more arms bearing neutral donor groups capable of interacting with a complexed metal ion and thereby affording enhanced cation binding compared to simple crown ethers. Evidence of enhanced cation binding has been obtained and the compounds have also shown utility as phase transfer catalysts.
    Type: Grant
    Filed: November 8, 1982
    Date of Patent: October 2, 1984
    Assignee: W. R. Grace & Co.
    Inventor: George W. Gokel
  • Nitrogen-containing polyether macrocycles with a sidearm containing neutral electron donor groups
    Patent number: 4436664
    Abstract: This invention relates to novel crown ether compositions which have been given the cognomen "lariat ethers". They have been designed with one or more arms bearing neutral donor groups capable of interacting with a complexed metal ion and thereby affording enhanced cation binding compared to simple crown ethers. Evidence of enhanced cation binding has been obtained and the compounds have also shown utility as phase transfer catalysts.
    Type: Grant
    Filed: January 15, 1982
    Date of Patent: March 13, 1984
    Assignee: W. R. Grace & Co.
    Inventor: George W. Gokel