Patents by Inventor Rodney M. Mittag

Rodney M. Mittag 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: 6080874
    Abstract: The present invention provides a simple, 1-step process for preparing a N-(aryl or heteroaryl)-hydroxyurea comprising reacting the corresponding alcohol, ester or ether with hydroxyurea and acid. This reaction is particularly useful for preparing a benzo[b]thienyl substituted N-hydroxyurea of formula: ##STR1## from compound 1: ##STR2## by reacting compound 1 with hydroxyurea and acid. R.sup.1 is selected from the group consisting of hydrogen, 1-6 carbon alkyl, 1-6 carbon alkoxy, and halogen; R.sup.2 is an 1-4 carbon alkyl; and R.sup.3 is selected from the group consisting of hydrogen, acyl, methyl, ethyl and mixtures thereof. Additional steps to isolate the pure bulk product follow.
    Type: Grant
    Filed: September 25, 1998
    Date of Patent: June 27, 2000
    Assignee: Abbott Laboratories
    Inventors: John E. Hengeveld, Elise H. Leese, Brian S. Moon, Dennis M. Abad, Kimberly A. Allen, Philip E. Bauer, David B. Murphey, Brian T. Fohey, Richard R. Copp, Jr., Greg S. Lannoye, Rodney M. Mittag
  • Patent number: 5738657
    Abstract: An ambulatory infusion and/or KVO (keep vein open) system (12, 18) has a gas-pressurized bladder arrangement (12) including a gas barrier associated therewith. The system includes a flexible bag of solution (13) inserted in a sleeve portion (36) of the bladder arrangement (12). Internal gas pressure which is developed within the bladder arrangement by a selectively initiated chemical reaction exerts a continuing pressure against the solution bag (13) to cause the solution to flow therefrom. A tubing set (18) of the system includes a flow restrictor (24) which is sized for minimal flow rates for indwelling catheter patency maintenance.
    Type: Grant
    Filed: December 19, 1996
    Date of Patent: April 14, 1998
    Assignee: Abbott Laboratories
    Inventors: Peter L. Bryant, Nicolaos A. Drivas, Rodney M. Mittag, John K. Moore, Edward S. Tripp, William L. Rudzena, John C. Williams