Alfred H. Mirman

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St. Louis, MO, US

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Patents Grantslast 30 patents

Information Patent Grant
Extruder with variable restriction element
- Patent number 6,261,081
- Issue date Jul 17, 2001
- Ralston Purina Company
- Donald R. Speck
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Process for mechanically controlling the bulk density of an extrude...
- Patent number 6,025,004
- Issue date Feb 15, 2000
- Ralston Purina Company
- Donald R. Speck
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL