Patents by Inventor Don H. Clarke

Don H. Clarke 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).

  • Fiberglass reinforced fixture with finished polymeric cap
    Patent number: 7278176
    Abstract: Polymeric plumbing fixtures such as sinks, lavatories and tubs are disclosed that comprise a thermoformed or molded interior shell having a top side with a relatively smooth, polymeric surface; a polymeric reinforcing layer bonded to the underside of the shell; and a thermoformed or polymeric cap nestably engageable with the underside of the reinforced shell. The cap cooperates with the shell to encapsulate the reinforcing layer and the reinforcing layer bonds the cap the shell to form a unitary structure. The polymeric cap thereby provides an attractive, finished surface on the underside of the resultant fixture. The structural configuration disclosed herein is particularly preferred for use in making kitchen sinks. A method for making the subject fixtures is also disclosed.
    Type: Grant
    Filed: May 30, 2002
    Date of Patent: October 9, 2007
    Assignee: Clarke Products, Inc.
    Inventor: Don H. Clarke
  • Fiberglass reinforced fixture with finished polymeric cap
    Publication number: 20040148696
    Abstract: Polymeric plumbing fixtures such as sinks, lavatories and tubs are disclosed that comprise a thermoformed or molded interior shell having a top side with a relatively smooth, polymeric surface; a polymeric reinforcing layer bonded to the underside of the shell; and a thermoformed or polymeric cap nestably engageable with the underside of the reinforced shell. The cap cooperates with the shell to encapsulate the reinforcing layer and the reinforcing layer bonds the cap the shell to form a unitary structure. The polymeric cap thereby provides an attractive, finished surface on the underside of the resultant fixture. The structural configuration disclosed herein is particularly preferred for use in making kitchen sinks. A method for making the subject fixtures is also disclosed.
    Type: Application
    Filed: May 30, 2002
    Publication date: August 5, 2004
    Inventor: Don H. Clarke
  • Bathtub
    Patent number: D572803
    Type: Grant
    Filed: August 29, 2007
    Date of Patent: July 8, 2008
    Assignee: Clarke Products, Inc.
    Inventor: Don H. Clarke
  • Walk-in bathtub
    Patent number: D573700
    Type: Grant
    Filed: January 2, 2008
    Date of Patent: July 22, 2008
    Assignee: Clarke Products, Inc.
    Inventor: Don H. Clarke