Stone working – Precious stone working
Reexamination Certificate
2005-05-17
2005-05-17
Hall, III, Joseph J. (Department: 3723)
Stone working
Precious stone working
C063S032000, C451S041000
Reexamination Certificate
active
06892720
ABSTRACT:
A method for producing a diamond includes forming a table lying in a table plane; forming crown facets that are oriented at an angle of between 26° and 35° relative to the table plane; forming upper pavilion (UP) facets below the crown facets at an angle of between 45° and 80° relative to a girdle plane lying between bottoms of the crown facets and tops of the UP facets; and forming a set of lower pavilion (LP) facets between bottoms of the UP facets and the culet at an angle of between 38° and 44° relative to the girdle plane. The UP and LP facets form a rib line positioned between one-fifth and four-fifths the distance between the girdle plane and the culet, such that the UP facets extend between 20% and 80% of the distance between the girdle plane and the culet.
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Peleg Uri
Schachter Michael
Brinkley, McNerney, et al
Crilly, Esq. Daniel C.
Crosby, Esq. Kevin P.
Hall, III Joseph J.
Thomas David B.
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