Title:
Process of improving certain physical properties of synthetic precious stones
United States Patent 1814219


Inventors:
Max, Jaeger
Hermann, Espig
Application Number:
US34156929A
Publication Date:
07/14/1931
Filing Date:
02/20/1929
Assignee:
IG FARBENINDUSTRIE AG
Primary Class:
Other Classes:
23/293R, 65/32.3, 65/114, 125/30.01, 501/86, 968/280
International Classes:
C30B29/26; G04B31/06
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