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US Patent: 2,314,827
Process for extracting pure nitrogen from air
Patentee: Richard M. Hortvet (exact or similar names) - Minneapolis, MN USPTO Classifications: 137/625.3, 261/93, 422/648, 423/229, 423/351, 431/171, 431/8 Tool Categories: Assignees: Diamond Iron Works, Inc. - Minneapolis, MN Manufacturer: Diamond Iron Works - Minneapolis, MN Witnesses: Unknown	Patent Dates: Applied: Feb. 27, 1939 Granted: Mar. 23, 1943 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Diamond Iron Works
Description: The assignee also made sawmill machinery.

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