Patents by Inventor David E. Hammer

David E. Hammer 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).

  • Removal of low level ethylene oxide contaminants by treatment of contaminated gases with cationic exchange resins at gas-solid interface reaction conditions
    Patent number: 4828810
    Abstract: A method of removing low levels of ethylene oxide (1% by volume or less) from ethylene oxide contaminated gases is provided. The removal is effected by contacting the ethylene oxide with a solid, cationic ion exchange resin at conditions such that the quantity of water present in the reaction zone is at a level such that the reaction of the ethylene oxide with resin occurs at a gas-solid interface to form an ethylene oxide derivative polymer which is bound to said resin.
    Type: Grant
    Filed: May 18, 1987
    Date of Patent: May 9, 1989
    Assignee: Advanced Air Technologies, Inc.
    Inventors: Richard J. Kruse, David E. Hammer
  • Gas mask filter for the removal of low level ethylene oxide contaminants from air comprising dried cationic exchange resins
    Patent number: 4813410
    Abstract: A gas mask filter material is described comprising a dried acidic ion exchange resin which is effective in removing low levels of ethylene oxide from air contaminated therewith. Specifically described is a gas mask filter comprising a cross-linked polystyrene resin with sulfonic acid functionality that contains less than about 20 percent by weight water.
    Type: Grant
    Filed: May 18, 1987
    Date of Patent: March 21, 1989
    Assignee: Advanced Air Technologies, Inc.
    Inventors: Richard J. Kruse, David E. Hammer