Appeal No. 95-2640
Application No. 07/949,289
c. first electrode means disposed between the electron
source and the target for producing an electric field, defined
by a multiplicity of equipotential lines having predetermined
shapes, for accelerating the flow of electrons toward the
target and focusing said flow of electrons at said target;
d. shutter electrode means for facilitating interruption
of the flow of electrons from the electron source to the
target, said shutter electrode means having a rim with an edge
defining an aperture for passing the flow of electrons, said
rim being positioned in a location where one of said
equipotential lines is to be produced, having a shape
substantially conforming to the predetermined shape of said
line, and having a minimal thickness at least at said edge,
such that, during transmission of the flow of electrons
through the aperture, the shutter electrode does not
substantially disturb the equipotential lines of the electric
field produced by the first electrode means.
The examiner relies on the following references:
Stoudenheimer et al. 3,474,275 Oct. 21, 1969
(Stoudenheimer)
Santilli et al. 3,989,971 Nov. 2, 1976
(Santilli)
Wang 4,814,599 Mar. 21,
1989
Claims 12 through 23 stand rejected under 35 U.S.C. §
112, second paragraph, as being indefinite. Claims 12 through
16, 18 and 19 stand further rejected under 35 U.S.C. § 102(b)
as anticipated by Stoudenheimer. Claims 17 and 20 through 23
stand further rejected under 35 U.S.C. § 103. As evidence of
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