Patents Assigned to Du Pont U.K. Ltd.
  • Method of manufacturing heat-weldable thermoplastic fittings
    Patent number: 4825534
    Abstract: Welding muffs for joining thermoplastic pipes are molded using a core in which are placed terminals supported by plastic posts which may be removable and/or frangible so that when the cores are withdrawn the plastic posts do not prevent withdrawal.
    Type: Grant
    Filed: September 2, 1987
    Date of Patent: May 2, 1989
    Assignee: Du Pont U.K. Ltd.
    Inventors: Peter White, Ronald A. Street, Christopher I. Greaves, Gordon Harrison