Appeal No. 96-2276
Application 08/128,622
Claims 14-22 stand rejected under 35 U.S.C. § 112, second
paragraph, as being indefinite for failing to particularly
point out and distinctly claim the subject matter which
applicant regards as the invention.
Claim 13 stands rejected under 35 U.S.C. § 102(b) as
being anticipated by Ragland.
Claims 14-17, 21, 23 and 24 stand rejected under 35
U.S.C. § 103 as being unpatentable over Ragland.
Claims 18-20 and 22 stand rejected under 35 U.S.C. § 103
as being unpatentable over Ragland in view of Morrell.
The Invention
The invention is directed to a color display tube
including an electron gun, a display screen, a shadow mask
disposed between the display tube and the electron gun, and a
four-sided support frame which holds the shadow mask. As
disclosed in the specification, differences in thermal
expansion of the mask and the frame result in bending or
flexing of the frame without further deforming the shadow
mask. Upon movement of the sides of the frame, the mask moves
closer to or away from the screen.
Claim 13 reads as follows:
13. A color display tube comprising an electron gun for
2
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