Patent ID: 8308002

Claim:
A plastic container having an upper portion and a body portion extending from said upper portion to a base, said base closing off an end of said container; said upper portion, said body portion and said base cooperating to define a receptacle chamber within said container into which product can be filled, said plastic container operable to attach to a closure member with an embossed thread, said plastic container comprising: a finish formed in said upper portion defining an opening into the container and a longitudinal axis; and a radial sidewall of said finish defined in part by an outwardly sweeping radial lip that extends about the longitudinal axis to transition into an outwardly stepped portion, the outwardly stepped portion protruding radially further from the longitudinal axis than the outwardly sweeping radial lip, the radial sidewall also defined by a land, the radial sidewall further defined by at least one groove, said at least one groove sloping gradually downward from a groove entrance along said finish, said at least one groove operable to threadably receive the embossed thread of the closure member, a first portion of the at least one groove being adjacent the groove entrance and being defined between the outwardly sweeping radial lip and the land, the first portion transitioning into a second portion of the at least one groove after a predetermined amount of groove travel around said finish, the second portion being defined between the outwardly stepped portion and the land, wherein the first portion has a first groove depth measured perpendicular to the longitudinal axis from the outwardly sweeping radial lip and the second portion has a second groove depth measured perpendicular to the longitudinal axis from the outwardly stepped portion, wherein said second groove depth is greater than said first groove depth.