Patents by Inventor Joseph M. Patterson, III

Joseph M. Patterson, III 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).

  • Bonded phase of silica for solid phase extraction
    Patent number: 4680121
    Abstract: A bonded phase silica product of the formula: ##STR1## in which ##STR2## is the backbone of a silica gel or controlled pore glass, X is selected from --O--, --S--, ##STR3## each R and R.sup.1 are each independently selected from hydrogen, an alkyl group of from 1 to 3 carbon atoms and --CH.sub.2).sub.m COOR.sup.3, R.sup.2 and R.sup.3 are each independently alkyl of from 1 to 4 carbon atoms, n is an integer of from 2 to 5, p is zero or one and m is an interger of from 1 to 4, is suitable for use in solid phase extraction for cleanup of urine samples for analysis of cannabinoids.
    Type: Grant
    Filed: August 4, 1986
    Date of Patent: July 14, 1987
    Assignee: J. T. Baker Chemical Company
    Inventors: Hugh E. Ramsden, Joseph M. Patterson, III
  • Bonded phase of silica for solid phase extraction
    Patent number: 4650784
    Abstract: A bonded phase silica product of the formula: ##STR1## in which ##STR2## is the backbone of a silica gel or controlled pore glass, X is selected from --O--, --S--, ##STR3## each R and R.sup.1 are each independently selected from hydrogen, an alkyl group of from 1 to 3 carbon atoms and --CH.sub.2).sub.m COOR.sup.3, R.sup.2 and R.sup.3 are each independently alkyl of from 1 to 4 carbon atoms, n is an integer of from 2 to 5, p is zero or one and m is an integer of from 1 to 4, is suitable for use in solid phase extraction for cleanup of urine samples for analysis of cannabinoids.
    Type: Grant
    Filed: February 20, 1986
    Date of Patent: March 17, 1987
    Assignee: J. T. Baker Chemical Company
    Inventors: Hugh E. Ramsden, Joseph M. Patterson, III