Appeal No. 1997-0569
Application No. 08/150,559
19. A product for use in providing a surface coating for
composition roofing materials, said product comprising:
granulated mineral-containing matter being sized so
that approximately 100% of said granulated matter will pass
through a number 8 U.S. Standard Sieve and no more than
approximately 2% will pass through a number 40 U.S. Standard
Sieve, said matter comprising slag having an initial elemental
iron content of about 15% to about 70% by weight, said iron
having been heated to a temperature of about 450°C to about
1,000°C for a period of time sufficient to oxidize said iron
and cause a change in color of said matter.
20. A roofing material comprising:
a man-made composition substrate; and
a granulated mineral-containing matter forming a
surface coating for said substrate,
said matter being sized so that approximately 100%
of said granulated matter will pass through a number 8 U.S.
Standard Sieve and no more than approximately 2% will pass
through a number 40 U.S. Standard Sieve, said matter
comprising slag having an initial elemental iron content of
about 15% to about 70% by weight, said iron having been
heated to a temperature of about 450°C to about 1,000°C
for a period of time sufficient to oxidize said iron and
cause a change in color of said matter.
A-2
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