Appeal No. 2000-0948 Page 5
Application No. 08/511,341
a pump laser for emitting pump laser pulses of light
at a preselected pump wavelength of about 2 microns;
means coupled to said pump laser being responsive to
each pump pulse from said pump laser for producing a
first wavelength pulse of light at about 3 microns in a
water absorption band of the tissue and a second
wavelength pulse of light at about 6 microns in a protein
absorption band of the tissue;
first optical means coupled to said producing means
for only passing therethrough each first wavelength pulse
from said producing means;
means coupled to said first optical means for
delaying each first wavelength pulse from said first
optical means by a predetermined period of time;
second optical means coupled to said producing means
for only passing therethrough each second wavelength
pulse from said producing means; and
means coupled to said second optical means and to
said delaying means for combining each second wavelength
pulse with the following delayed first wavelength pulse
to form a stream of consecutive second and delayed first
pulse pairs for application to the tissue.
The examiner found (answer, p. 3) that (1) Feld teaches
"the desirability of applying pulse sequences of different
wavelength to provide tissue ablation using less energy over
all;"
(2) Edwards teaches "the desirability of using 3 micron light
to remove tissue and the desirability of using 6 micron light
to remove tissue;" and (3) Eckardt teaches "the generation for
6 micron light with Ho:YLF or Nd:Yag pumps." After the scope
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