Patents by Inventor John M. H. Leighton

John M. H. Leighton 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).

  • Reduction of draughts through sliding sash windows
    Patent number: 4604831
    Abstract: Vertical and horizontal sliding sash windows have two parallel but spaced leaves which slide in respective portions of the window opening. The portions are separated by a parting bead which extends around the window opening. Draught between the parting bead and the window leaves is reduced by the provision of seals between the parting bead and the window surfaces. These are formed by pile weatherstrips carried either on a replacement parting bead formed in one or two pieces. The remainder of the window is also sealed for the reduction of draughts.
    Type: Grant
    Filed: April 13, 1984
    Date of Patent: August 12, 1986
    Assignee: Ventrolla Limited
    Inventors: Robert W. Tunnicliffe, John M. H. Leighton