US Patent: 515,896 - Mortar for stamp-mills


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US Patent: 515,896

Mortar for stamp-mills

Patentee:

Henry Bolthoff (exact or similar names) - Denver, CO

USPTO Classifications:

209/56, 209/67, 241/68

Tool Categories:

specialty machines : ore processing apparatus

Assignees:

None

Manufacturer:

Hendrie & Bolthoff Manufacturing & Supply CO. - Denver, CO

Witnesses:

J. E. Ray

William McConnell

Patent Dates:
Applied:	Jan. 14, 1893
Granted:	Mar. 06, 1894

Patent Pictures:

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Vintage Machinery entry for Hendrie & Bolthoff Mfg. & Supply Co.

Description:

Seen in an 1898 Hendrie & Bolthoff catalog, "Bolthoff Gold Mortar. Especially designed for gold ores and used extensively. We can also furnish Gilpin County low mortars."