Patents by Inventor Donald D. Hedberg

Donald D. Hedberg 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: 5015276
    Abstract: Disclosed is a cabinet for storing containers of volatile hazardous liquids, the cabinet having therein, in a place out of the way of the containers stored therein, a vapor trap for adsorbing and/or neutralizing vapors of said liquids. The vapor trap may be fastened in the cabinet to be easily removed, and replaced, or to be chemically or mechanically recharged and then replaced. The trap has an outer perforate shell containing therewithin vapor trapping material such as a vapor adsorbing and/or a vapor neutralizing material. The material may be in loose, particulate form or may be carried in one or more fiber sheets. The shell may be of rectangular box shape or of right-triangular box shape, to enhance positioning the vapor trap in the cabinet in a place out of the way of the containers. The vapor trapping material may be activated carbon, impregnated or unimpregnated, and/or may be slaked lime or activated alumina.
    Type: Grant
    Filed: November 28, 1989
    Date of Patent: May 14, 1991
    Assignee: Lab Safety Supply, Inc.
    Inventors: Donald D. Hedberg, Michael H. Litin