Van Drie; Gerhardt
Patent Applications and Registrations
Patent applications and USPTO patent grants for Van Drie; Gerhardt.The latest application filed is for "biological waste digester".
- Van Drie; Gerhardt - El Segundo CA US
| Patent | Date |
|---|---|
| Biological waste digester Grant 8,357,293 - Van Drie January 22, 2 | 2013-01-22 |
| Biological Waste Digester App 20130015128 - Van Drie; Gerhardt | 2013-01-17 |
| Biological waste digester and method of operation Grant 8,133,386 - Van Drie March 13, 2 | 2012-03-13 |
| Process for high-volume disposal of sludge and collection of combustible gases Grant 7,476,054 - Van Drie January 13, 2 | 2009-01-13 |
| Process for high-volume disposal of sludge and collection of combustible gases App 20080170910 - Van Drie; Gerhardt | 2008-07-17 |
| Integrated fixed film activated sludge system using gravity assisted mixing Grant 7,083,324 - Van Drie August 1, 2 | 2006-08-01 |
| High dissolved oxygen mixer-digester method App 20020158013 - Van Drie, Gerhardt | 2002-10-31 |
| Unloading-type conveyor system Grant 4,253,791 - Van Drie March 3, 1 | 1981-03-03 |
| Apparatus for collecting solid-waste material Grant 3,923,169 - Van Drie December 2, 1 | 1975-12-02 |
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