Patents by Inventor Thomas A. Morris

Thomas A. Morris 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).

  • Crystal form of anhydrous 7-(?1.alpha.,5.alpha.,6.alpha.!-6-amino-3-azabicyclo?3.1.0!hex-3-yl)-6-f luoro-1-(2,4-difluorophenyl)-1,4-dihydro-4-oxo-1,8 naphthyridine-3-carboxylic acid, methanessulfonic acid salt
    Patent number: 5763454
    Abstract: The anhydrate of 7-(?1.alpha.,5.alpha.,6.alpha.!-6-amino-3-azabicyclo?3.1.0!hex-3-yl)-6-flu oro-1-(2,4-difluorophenyl)-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid, methanesulfonic acid salt has advantageous stability for formulation as an antibacterial agent.
    Type: Grant
    Filed: May 21, 1997
    Date of Patent: June 9, 1998
    Assignee: Pfizer, Inc.
    Inventors: Lynne A. Handanyan, Thomas A. Morris, Robert L. Hendrickson, Phillip J. Johnson, Timothy Norris
  • Process for sultamicillin intermediate
    Patent number: 5399678
    Abstract: A simplified method for making the chloromethyl ester of sulbactam in which the tetraalkylammonium sulbactam salt is not dried and isolated prior to alkylation. The method comprises reacting a tetraalkylammonium salt and a sulbactam salt in an aqueous solution to form an aqueous solution of tetraalkylammonium sulbactam. The tetraalkylammonium sulbactam is extracted into bromochloromethane or iodochloromethane, and water is removed from the organic layer to enhance the formation of the chloromethyl ester of sulbactam. The tetraalkylammonium sulbactam is reacted with bromochloromethane or iodochloromethane in the organic layer to form the chloromethyl ester of sulbactam.
    Type: Grant
    Filed: September 28, 1992
    Date of Patent: March 21, 1995
    Assignee: Pfizer Inc.
    Inventors: Dennis M. Godek, Thomas A. Morris
  • Collapsible walking frame having pivotal seat
    Patent number: 4643211
    Abstract: The collapsible walking frame for use by an invalid comprises a pair of interconnected spaced side frames (10, 12) each including a front member (14) having a handgrip (18) and a rear member (24) pivotally connected to the front member (14). A seat (28) pivotally connected between the front members (14) is movable from an inoperative vertical position to an operative horizontal position. The seat (28) is horizontally supported in the operative position on rear brace (26) and held in the vertical position by being fastened to front brace (22). The front and rear members of the side frames are stably supported in the operative position of the frame by pivotal locking side braces (27) which permit pivotal folding of the frame to the inoperative storage position.
    Type: Grant
    Filed: November 2, 1984
    Date of Patent: February 17, 1987
    Assignee: Uniscan Limited
    Inventors: Thomas A. Morris, Leslie D. Norman
  • Mechanism for operating the locking means for the chill plate of a rigid starter bar
    Patent number: 3931849
    Abstract: A method and mechanism for operating the locking means for the chill plate of a rigid starter bar in a continuous-casting machine. The mechanism enables the starter bar to remain in contact with its hoist throughout the operating cycle and assures that the leading end of a casting always is at the same level when the starter bar is disconnected, and also assures that the chill plate is properly locked to the starter bar when the latter is lifted into position to begin a cast.
    Type: Grant
    Filed: August 20, 1974
    Date of Patent: January 13, 1976
    Assignee: United States Steel Corporation
    Inventor: Thomas A. Morris