Self-locking container and container blank

Envelopes – wrappers – and paperboard boxes – Paperboard box – A sidewall includes a horizontally or downwardly extending...

Reexamination Certificate

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Details

C229S177000, C229S179000, C229S186000

Reexamination Certificate

active

11094878

ABSTRACT:
The embodiments of the present invention provide a blank of foldable material that configured to form a container. When formed, the container is completely self-locking. Additionally, when the blank is formed with any number of known liquid-proof sheet material or coatings, the container provides a leak/sift proof structure. Also, the container provides for all inside surfaces to be smooth, flat and interrupted surfaces. Further, as the hand hold cutouts are covered by end panels, the container retards hot or cold inside temperature degradation, which make the container ideal for use as a low-cost cooler or the like.

REFERENCES:
patent: 2151472 (1939-03-01), Hubbard
patent: 3627541 (1971-12-01), Farquhar
patent: 4391405 (1983-07-01), Drinon
patent: 4648549 (1987-03-01), Trutna
patent: 5050794 (1991-09-01), Wischusen, III
patent: 5255841 (1993-10-01), Ritter
patent: 5284294 (1994-02-01), Floyd
patent: 5307982 (1994-05-01), Swindell

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