In the matter of the Patents Act 1903-1946, in the matter of Commonwealth Letters Patent No. 10,796/32 dated 21st October, 1932, for an improved process and apparatus for clarifying, deaerating and precipitating hydro-metalurgical solutions particularly cyanide solutions granted to The Merrill Company in the matter of an application for an extension of the term of said Letters Patent. (Commonwealth of Australia Gazette (National : 1901 - 1973), 1948)