Patent ID: 6627278
Filing Date: 2003-09-30
Classification: B29C,B29K,B29L,B65D,Y10T

Abstract:
An injection blow-molded washable polycarbonate permaware tumbler comprising:(a) a base forming the bottom of said tumbler defining an outer edge thereof; (b) a sidewall integrally formed with said base extending upwardly from the outer edge thereof and having a thickness of from about 50 to about 500 mils to a fortified rim about its upper extremity; wherein said polycarbonate is a hydrolysis-stabilized polycarbonate such that the tumbler is substantially hydrolytically stable over 10 wash cycles in alkaline environments having a pH of greater than about 9, wherein each wash cycle involves temperatures of above about 110Â° F. for more than 45 minutes.