Patents by Inventor Mark E. Welfer

Mark E. Welfer 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: 5909845
    Abstract: A child-resistant, wick-based liquid emanation system includes a container which is capable of containing liquid and has an opening. A wick is partially disposed within the container and extends through the opening of the container. A hollow overcap encases the extended portion of the wick and has a closed, separable tip and an open base attached to cover the opening of the container. The system is activated by separating the tip from the overcap. A retainer may be provided for obstructing complete removal of the wick from the container through the overcap after the tip is separated from the overcap. The retainer can include a shoulder disposed in the overcap between the tip and the base to retain the wick toward the base of the overcap. Alternatively, a protrusion from the wick can engage an inner surface of the overcap or the container. In this case, the overcap can have a frangible portion facilitating separation of the tip, and the wick can extend past the frangible portion toward the tip.
    Type: Grant
    Filed: June 28, 1996
    Date of Patent: June 8, 1999
    Assignee: S. C. Johnson & Son, Inc.
    Inventors: Keith J. Greatbatch, Mark E. Welfer