Patents by Inventor Frank T. Clark, Jr.

Frank T. Clark, Jr. 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).

  • Method of making a sponge mop part
    Patent number: 4077672
    Abstract: A process for making a replaceable part of a sponge mop normally referred to as a refill. The refill is made by enclosing the sponge in a mold and compressing it to close the pores of the sponge on at least one side. A thermoplastic material in the molten state is then injected into the mold against at least one surface of the sponge and allowed to cool. The sponge is then removed from the mold, and water is applied to it to expand it to its original condition.
    Type: Grant
    Filed: September 27, 1976
    Date of Patent: March 7, 1978
    Assignee: Tantera, Inc.
    Inventor: Frank T. Clark, Jr.
  • Combined portable mop bucket and cover with wringer
    Patent number: D344379
    Type: Grant
    Filed: June 17, 1992
    Date of Patent: February 15, 1994
    Assignee: Emsco, Inc.
    Inventor: Frank T. Clark, Jr.