analysis evidenced the presence of volatile terpenoids as well as less volatile
ones.
It will be evident to those skilled in the art that the choice of sorbent is
dependent upon the nature of the volatiles of interest (in the present example,
a silica sorbent was appropriate). Direct injection of the volatiles without the
use of any trap of any kind (cold or sorbent) is possible by the use of this
invention because ofthe short sampling duration and because of the relatively
small volume of sampling necessary. Purge and trap would not allow such a
direct injection without a cold trap of kind, or of a sorbent. The use of this
invention, in this particular example, showed that a purge and trap analysis
can be performed more rapidly, with less operations (hence reduced risks of
sample loss or sample degradation), at a much reduced cost and with less
energy than conventional technology. Again, the use of this invention
requires less intricate equipment occupying a much reduced space and
obtainable at a much reduced capital cost.
P. Ex. 2002, col. 7,1. 66 - col. 8,1. 42.
F 35. Park 426 does not expressly describe intermittently applying vacuum or reduced pressure
during the exposure to microwaves.
F 36. Park 426 does not expressly describe hydrodistilling the natural product by conveying the
natural product and water as an azeotropic mixture and separating the natural product from
the azeotrope.
2) U.S. Patent 5,519,947 (Park 947)
F 3T Park 947 issued from an application said to be a continuation-in-part of the application that
issued as Park 426. P. Ex. 2001, col. 1, 11. 5-6..
F 38. Park 947 relates to microwave assisted generation of volatile components from a variety of
materials. P. Ex. 2001, col. 1, 11. 10-12.
F 39. Par6 947 says that there is a need for a method of enhancing the volatility of the volatilizable
substances and for selectively separating the volatile component. P. Ex. 200 1, col. 2,11. 1-15.
F 40. Park 947 notes that using the microwave techniques of the invention, volatile components
for a variety of uses may be generated more easily with greater efficiency while allowing for
less error and contamination. P. Ex. 200 1, col. 2, 11. 17-20.
F 41. Park 947 says the volatilization procedure is preferably performed in a sealed container. P.
Ex. 2001, col. 2,11. 25-29.
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