Patents by Inventor Alan R. Ketring

Alan R. Ketring 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).

  • Patent number: 6054115
    Abstract: A compound and method of making a compound for use as a diagnostic or therapeutic pharmaceutical comprises at least one functionalized hydroxyalkyl phosphine donor group and one or more sulfur or nitrogen donor and a metal combined with the ligand.
    Type: Grant
    Filed: March 3, 1998
    Date of Patent: April 25, 2000
    Assignee: The Curators of the University of Missouri
    Inventors: Kattesh V. Katti, Srinivasa Rao Karra, Douglas E. Berning, C. Jeffrey Smith, Wynn A. Volkert, Alan R. Ketring
  • Patent number: 5948386
    Abstract: A method of forming phosphine-amine conjugates includes reacting a hydroxymethyl phosphine group of an amine-free first molecule with at least one free amine group of a second molecule to covalently bond the first molecule with the second molecule through an aminomethyl phosphorus linkage and the conjugates formed thereby.
    Type: Grant
    Filed: March 14, 1997
    Date of Patent: September 7, 1999
    Assignee: The Curators of the University of Missouri
    Inventors: Kattesh V. Katti, Douglas E. Berning, Wynn A. Volkert, Alan R. Ketring, Robert Churchill
  • Patent number: 5876693
    Abstract: A compound and method of making a compound for use as a diagnostic or therapeutic pharmaceutical comprises a functionalized hydroxyalkyl phosphine ligand and a metal combined with the ligand.
    Type: Grant
    Filed: July 30, 1997
    Date of Patent: March 2, 1999
    Assignee: The Curators of the University of Missouri
    Inventors: Kattesh V. Katti, Prahlad R. Singh, V. Sreenivasa Reddy, Kavita K. Katti, Wynn A. Volkert, Alan R. Ketring
  • Patent number: 5855867
    Abstract: A compound and method of making a compound for use as a diagnostic or therapeutic pharmaceutical comprises at least one functionalized hydroxyalkyl phosphine donor group and one or more sulfur or nitrogen donor and a metal combined with the ligand.
    Type: Grant
    Filed: March 14, 1997
    Date of Patent: January 5, 1999
    Assignee: The Curators of the University of Missouri
    Inventors: Kattesh V. Katti, Srinivasa Rao Karra, Douglas E. Berning, C. Jeffrey Smith, Wynn A. Volkert, Alan R. Ketring
  • Patent number: 5843993
    Abstract: A complex and method for making same for use as a diagnostic or therapeutic pharmaceutical includes a ligand comprising at least one hydroxyalkyl phosphine donor group bound to a gold atom to form a gold-ligand complex that is stable in aqueous solutions containing oxygen, serum and other body fluids.
    Type: Grant
    Filed: March 14, 1997
    Date of Patent: December 1, 1998
    Assignee: The Curators of the University of Missouri
    Inventors: Kattesh V. Katti, Douglas E. Berning, Wynn A. Volkert, Alan R. Ketring
  • Patent number: 5601800
    Abstract: A class of diagnostic and therapeutic compounds derived from phosphinimines that include ligands containing either a single phosphinimine functionality or both a phosphinimine group and a phosphine or arsine group, or an aminato group, or a second phosphinimine moiety. These phosphinimine ligands are complexed to early transition metal radionuclides (e.g. .sup.99m Tc or .sup.186 Re/.sup.188 Re) or late transition metals (e.g., .sup.105 Rh or .sup.109 Pd). The complexes with these metals .sup.186 Re/.sup.188 Re, .sup.99m Tc and .sup.109 Pd exhibit a high in vitro and high in vivo stability. The complexes are formed in high yields and can be neutral or charged. These ligands can also be used to form stable compounds with paramagnetic transition metals (e.g. Fe and Mn) for potential use as MRI contrast agents. Applications for the use of ligands and making the ligands are also disclosed.
    Type: Grant
    Filed: July 29, 1994
    Date of Patent: February 11, 1997
    Assignee: Curators of the University of Missouri
    Inventors: Kattesh V. Katti, Wynn A. Volkert, Alan R. Ketring, Prahlad R. Singh
  • Patent number: 5516940
    Abstract: A compound and method of making a compound for use as a diagnostic or therapeutic pharmaceutical comprises either a phosphorous or germanium core and at least two hydrazine groups forming a ligand for bonding to a metal extending from the phosphorous or germanium core.
    Type: Grant
    Filed: April 29, 1994
    Date of Patent: May 14, 1996
    Assignee: Curators of the University of Missouri
    Inventors: Kattesh V. Katti, Wynn A. Volkert, Alan R. Ketring, Prahlad R. Singh
  • Patent number: 5478474
    Abstract: The method of treating liquid waste in a media is accomplished by exposing the media to phosphinimines and sequestering .sup.99 Tc from the media by the phosphinimine (PN) functionalities. The system for treating the liquid waste in the media includes extraction of .sup.99 TcO.sub.4.sup.- from aqueous solutions into organic solvents or mixed organic/polar media, extraction of .sup.99 Tc from solutions on a solid matrix by using a container containing PN functionalities on solid matrices including an inlet and outlet for allowing flow of media through an immobilized phosphinimine ligand system contained within the container. Also, insoluble suspensions of phosphinimine functionalities on solid matrices in liquid solutions or present on supported liquid membranes (SLM) can be used to sequester .sup.99 Tc from those liquids.
    Type: Grant
    Filed: December 10, 1993
    Date of Patent: December 26, 1995
    Assignee: Curators of the University of Missouri
    Inventors: Kattesh V. Katti, Wynn A. Volkert, Prahlad Singh, Alan R. Ketring
  • Patent number: 4935222
    Abstract: A sterile pyrogen free Re.sup.196 or Re.sup.188 radiopharmaceutical is prepared by reducing radioactive perrhenate in the presence of a bone seeking ligand to form a solution including complexed Re-ligand compound together with impurities such as uncomplexed perrhenate, ReO.sub.2 and free ligand. The radiopharmaceutical is obtained by a low pressure purification method. The solution is added to a separation column, preferably an ion exchange column, and a first portion is eluted and discarded. The radiopharmaceutical is collected in a second eluted portion defined as having 25-85% of the activity of the Re on the column, less than 10% unligated perrhenate and less than 1% ReO.sub.2. This can be used as is to image and treat metastatic bone leasions. A simple kit is also disclosed.
    Type: Grant
    Filed: June 13, 1986
    Date of Patent: June 19, 1990
    Assignee: University of Cincinnati
    Inventors: Edward A. Deutsch, Harry R. Maxon, III, Karen F. Libson, Alan R. Ketring
  • Patent number: 4732974
    Abstract: A conjugate of a protein or polypeptide and a metal ion is prepared by reacting a metal ion transfer complex comprising a chelate of 4,5-dihydroxyl-m-benzenedisulfonic acid or a salt thereof with a protein or polypeptide that is covalently bound to an exogenous chelating group having a greater affinity than 4,5-dihydroxyl-m-benzenedisulfonic acid for the metal ion.
    Type: Grant
    Filed: March 5, 1986
    Date of Patent: March 22, 1988
    Assignee: Mallinckrodt, Inc.
    Inventors: Robert A. Nicolotti, Alan R. Ketring, Koon Y. Pak