Patents Represented by Attorney, Agent or Law Firm Robert F. L. Conte
  • Apparatus for the manufacture of corrugated plastic pipes
    Patent number: 6457965
    Abstract: An apparatus for the manufacture of corrugated plastic pipes comprises half shells. Each half shell has a base body which consists of a metal of a higher thermal conductivity and a lower specific gravity than steel and which holds a core. Provided in the core is a mold recess in which to form the corrugated pipes.
    Type: Grant
    Filed: May 4, 2000
    Date of Patent: October 1, 2002
    Inventor: Ralph Peter Hegler