| Search Again | Story County, Iowa Inventory Patents |
Story Co. Home Page |
| Name | Patent Title | Patent Number |
City | Year |
|---|---|---|---|---|
| Colin D. CHRISWELL | process of concentrating ethanol from dilute aqueous solutions thereof | 04277635 | Slater | 1981 |
| Colin D. CHRISWELL | chemical cleaning of coal by molten caustic leaching after pretreatment by low-temperature devolatilization | 04859212 | Slater | 1989 |
| Colin D. CHRISWELL | material separation efficiency determination employing fluorescing control particles | 05024753 | Slater | 1991 |
| Colin D. CHRISWELL | method and means for testing soil samples | 05181428 | Slater | 1993 |
| Colin D. CHRISWELL | in situ isolation of volatile organic compounds from groundwater | 05478452 | Slater | 1995 |
| Colin D. CHRISWELL | method of treating coal to reduce sulphur and chlorine emissions | 05505746 | Slater | 1996 |
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