Patents Assigned to John M. Chupik
  • Door sill and adjustable threshold
    Patent number: 4476653
    Abstract: A wooden door sill has an inclined tread portion rising to a threshold which lies beneath the door when the latter is closed. The threshold has a longitudinal upwardly-open groove containing a strip. In order to provide an adjustable fit of the strip against the under edge of the door, the strip is screwed down against a resilient compressible filler strip in the bottom of the groove.
    Type: Grant
    Filed: January 10, 1983
    Date of Patent: October 16, 1984
    Assignee: John M. Chupik
    Inventors: Wayne Speer, John M. Chupik