ABB Environmental Services, Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5480550 Biotreatment process for caustics containing inorganic sulfidesExpiredMay 05, 94Jan 02, 96[C02F]
5269929 Microbial process for the reduction of sulfur dioxideExpiredNov 10, 92Dec 14, 93[C02F]
5196121 Decomposition of halogenated aliphatic hydrocarbons in a bioreactorExpiredOct 03, 89Mar 23, 93[C02F]
5077208 Microbial removal of no.sub.x from gasesExpiredJun 04, 90Dec 31, 91[C12P]
5032291 Catalytic reduction of nitro- and nitroso- substituted compoundsExpiredJun 22, 90Jul 16, 91[C02F]
5004551 Catalytic oxidation of hazardous wastesExpiredJun 22, 90Apr 02, 91[C02F]
4880542 Biofilter for the treatment of sour waterExpiredMay 13, 88Nov 14, 89[C02F]
4879240 Microbial control of hydrogen sulfide production by sulfate reducing bacteriaExpiredJul 19, 88Nov 07, 89[C12N]
4859588 Production of a single cell proteinExpiredMay 05, 88Aug 22, 89[C12P]
4760027 Microbiological desulfurization of gasesExpiredApr 09, 86Jul 26, 88[A61L]

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