Patents by Inventor Roy A. Michaelsen

Roy A. Michaelsen 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).

  • Safety overcap for standard metal screwcaps
    Patent number: 4095717
    Abstract: A safety closure is disclosed which is a one piece plastic molded overcap intended for use with a standard metal screwcap extensively used to close containers of dangerous and toxic materials. The overcap is intended to readily useable manipulation by adults to apply the standard screwcap to a container and to remove the standard cap from a container, but is intended to prevent unauthorized opening by young persons, such as small children.
    Type: Grant
    Filed: December 29, 1976
    Date of Patent: June 20, 1978
    Assignee: Almar Enterprises, Inc.
    Inventor: Roy A. Michaelsen