Appeal No. 1998-2424
Application 08/515,269
or it could be used as a disposable liner for a glass
laboratory beaker. The thermoplastic beaker disclosed can be
made with extremely thin walls and has excellent physical,
optical, and thermal characteristics which ideally suits it
for use in medical, biological, or chemical laboratories as an
inexpensive, disposable, generally chemically inert and high
temperature stable beaker. See column 4, lines 58 - 61. Such
containers are made so that they will fit snugly within
standard laboratory glassware such as beakers. See column 5,
lines 13 - 15. The beakers so made can be freestanding
laboratory beakers. In some embodiments, those to be used as
beaker liners, the sidewall 74 and bottom 76 are less than
0.010 inches thick. The thin bottom of such a beaker liner is
nonetheless quite strong because it has the highest polymer
orientation in the container. See column 12, lines 5 - 12.
The above noted disclosure of Fortin evidences a
recognition in the art that disposable beaker liners which are
autoclaveable and suited for biological tasks are made
inexpensive and disposable for the self-evident advantage of
eliminating the need to wash laboratory glassware. In view of
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