Appeal No. 1998-0335
Application 08/518,061
The disclosed invention pertains to the field of
picture display devices. An electron gun for generating at
least one electron beam has a main lens system which is made
up of a first electrode, a last electrode and at least one
intermediate electrode. The intermediate electrode comprises
a plurality of substantially identical plates.
Representative claim 7 is reproduced as follows:
7. A picture display device comprising an envelope
containing an luminescent display screen and an electron gun
for producing at least one electron beam for deflection across
the display screen, said electron gun comprising a main lens
system having a first electrode, a second electrode, and at
least one intermediate electrode disposed between said first
and second electrodes, each of said electrodes having at least
one aperture for passing the at least one electron beam, said
at least one intermediate electrode comprising substantially
identical, conductive first and second plates and means for
conductively attaching said plates to each other with the at
least one aperture in the first plate aligned with the at
least one aperture in the second plate.
The examiner relies on the following references:
Shimoma et al. (Shimoma) 4,935,663 June 19, 1990
Matsuda JP 61-8832 Jan. 16, 1986
(abstract only)
Claims 7-11 stand rejected under 35 U.S.C. § 103. As
evidence of obviousness the examiner offers Shimoma in view of
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