Appeal 2007-3363
Application 10/342,711
The specification is consistent with Hell's teaching that those of skill
knew that binderless screens are preferred and that needle-like alkali halide
phosphors make good binderless screens possible. (Spec. 2:9-35; Hell
passim.) From Hell, those in the art would know how to make such screens
using CsX:Eu phosphors on white pigmented supports.
From Takahashi, they would know that colored pigments improve
screen resolution. From Takahashi and Powell, they would know how to
pick selective pigments that absorb stimulating radiation in wavelengths
different than those the phosphors emit. Takahashi permits some overlap,
while Powell completely avoids stimulating radiation in the range (visible)
important to screen users, using ultraviolet and infrared stimulating radiation
instead.
We take official notice that a person having ordinary skill in the art
would know that 600 nm light is orange-red and would be absorbed by blue-
green pigments, while infrared light has wavelengths greater than 600 nm.
Such a person would know that Powell's use of infrared stimulating radiation
and complementary dyes would not effect the visible-light emission of
Powell's phosphors.
Agfa argues that Takahashi and Hell teach that resolution and
sensitivity are mutually exclusive because Takahashi's pigments would
undermine Hell's quest for greater sensitivity, while Takahashi's suggestion
to increase stimulating radiation intensity is impractical. (Br. 7.) There are
two problems with this argument. First, Takahashi does suggest increasing
stimulating radiation intensity as an option, but focuses instead on choosing
a selective pigment that does not absorb wavelengths the phosphor emits.
Second, the problems Agfa cites for increasing stimulating radiation
intensity are not supported with citations to the record and will not be
8
Page: Previous 1 2 3 4 5 6 7 8 9 10 Next
Last modified: September 9, 2013