Adapting bacteria to low pH and high arsenic concentration for use in oxidizing sulfide ores
Patent 4888293 Issued on December 19, 1989. Estimated Expiration Date: 
July 10, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
July 10, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3607235 3856913 Bioadsorption alteration of iron sulfide surfaces Microbial leaching of sulphide-containing ores Dental post for retention of a prosthetic superstructure Construction of arsenic resistance vectors for Thiobacillus ferrooxidans Patent #: 4748118 InventorsAssigneeApplicationNo. 071968 filed on 07/10/1987US Classes:435/245, Adaptation or attenuation of cells435/252.4, Mixed culture435/262PROCESS OF UTILIZING AN ENZYME OR MICRO-ORGANISM TO DESTROY HAZARDOUS OR TOXIC WASTE, LIBERATE, SEPARATE, OR PURIFY A PREEXISTING COMPOUND OR COMPOSITION THEREFORE; CLEANING OBJECTS OR TEXTILESExaminersPrimary: Weimar, Elizabeth C.Attorney, Agent or FirmForeign Patent References
International ClassesC12N 001/36C12N 001/20 C22B 001/11 AbstractBacterial cultures of T. thiooxidans, T. ferrooxidans and L. ferrooxidans used to oxidize multimetallic sulfide ores are first adapted to high dissolved arsenic concentrations and low pH by subjecting the cultures in a solution containing dissolved arsenic, to successive incremental concentrations of arsenic while operating in a continuous mode.Other References
Field of SearchProcess involving micro-organisms of different genera in the same process, simultaneouslyPROCESS OF UTILIZING AN ENZYME OR MICRO-ORGANISM TO DESTROY HAZARDOUS OR TOXIC WASTE, LIBERATE, SEPARATE, OR PURIFY A PREEXISTING COMPOUND OR COMPOSITION THEREFORE; CLEANING OBJECTS OR TEXTILES Cleaning using a micro-organism or enzyme Petroleum oil or shale oil treating Desulfurizing Using bacteria or actinomycetales Adaptation or attenuation of cells Mixed culture |
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