Appeal No. 96-0004
Application No. 08/147,759
The subject matter on appeal is directed to irregularly
shaped glass fibers suitable for insulation. The claimed
glass fibers are defined by certain physical properties of
first and second glass compositions from which the fibers are
composed.
Claim 23 is representative and is reproduced below:
23. Irregularly-shaped glass fibers suitable for insulation
comprising separate first and second oxide glass compositions
having:
a. nonindentical coefficients of thermal expansion, the
nonidentical coefficients of thermal expansion having a
difference greater than about 2.0 ppm/°C,
b. log3 viscosity temperatures within the range of from
about 1850 to about 2050°F (1010 to 1121°C),
c. liquidus temperatures of at least 50°F(28°C) below
that of the log3 viscosity temperatures, and
d. chemical durabilities of less than about 4.0%.
Claims 23-33 stand rejected under 35 U.S.C. § 112, second
paragraph, as indefinite. All appealed claims stand rejected
under 35 U.S.C. § 112, first paragraph, “written description
requirement”. We reverse.
In a situation as the present one, wherein claims are
rejected under both the first and second paragraphs of 35
U.S.C. § 112, the definiteness of the claims are addressed
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