Coating processes – Particles – flakes – or granules coated or encapsulated
Reexamination Certificate
2003-06-20
2010-10-12
Lightfoot, Elena T (Department: 1715)
Coating processes
Particles, flakes, or granules coated or encapsulated
C427S186000, C427S214000, C427S219000
Reexamination Certificate
active
07811630
ABSTRACT:
Algae-resistant roofing granules are formed by extruding a mixture of mineral particles and a binder to form porous granule bodies, and algaecide is distributed in the pores. Release of the algaecide is controlled by the structure of the granules.
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Hardy Anne B.
Hong Keith C.
Johnson, Jr. Andrew G.
Kalkanoglu Husnu M.
Salvatore James A.
Certain-Teed Corporation
Lightfoot Elena T
Paul & Paul
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