Appeal No. 96-1400
Application No. 08/242,478
This is an appeal from the final rejection of claims 11-
20, all the claims remaining in the present application.
Claim 11 is illustrative:
11. Glass fiber composition comprising an inorganic
fiber comprising silicon dioxide, calcium oxide, and alkali
oxide having a free energy of hydration greater than (more
positive than) -5.00 kcal/mol, a free energy of formation less
than (more negative than) -210.0 kcal/mol, a dissolution rate
in simulated extra cellular fluid greater than 750 (calculated
as nanograms of fiber/per square centimeter of fiber surface
area/per hour) and having an average fiber diameter not
greater than 4.5 micrometers.
The examiner relies upon the following reference as
evidence of obviousness:
Parrott 372,486 Nov. 1, 1887
Appellants' claimed invention is directed to a glass
fiber composition and a method of manufacturing the
composition. The composition comprises silicon dioxide,
calcium oxide and an alkali oxide having the recited
properties of free energy of hydration, free energy of
formation and a dissolution rate in simulated extra cellular
fluid. The glass fiber composition of the present invention
is biosoluble.
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