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James R Bolton, R D Samuel Stevens, Bertrand Dussert: Method for the inactivation of cryptosporidium parvum using ultraviolet light. Calgon Carbon Corporation, Cohen & Grigsby P C, May 20, 2003: US06565803 (74 worldwide citation)

A method for the inactivation of Cryptosporidium oocysts, Giardia cysts and similar organisms comprising irradiating water with ultraviolet light in doses of from about 1 mJ/cm


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Stephen R Cater, Pauline M Brown, J Adele Buckley, R D Samuel Stevens: Treating contaminated effluents and groundwaters. Solarchem Enterprises, Rogers Bereskin & Parr, August 27, 1991: US05043080 (45 worldwide citation)

A method of treating a liquid effluent or groundwater containing organic contaminants is provided. The liquid effluent or groundwater containing the organic contaminants is contacted with hydrogen peroxide and transition metal ions. The hydrogen peroxide and transition metal ions are present in effe ...


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R D Samuel Stevens, Pauline M Brown: Process for treatment of organic contaminants in solid or liquid phase wastes. Solarchem Research A Division of Brolor Investments, Rogers Bereskin & Parr, December 27, 1988: US04793931 (38 worldwide citation)

Solid or liquid phase wastes containing organic contaminants which can be photodegraded are treated. The contaminants are extracted into a perfluorinated solvent which is inert to the photodegradation step. In the case of solid wastes, such as contaminated soils, sediments or sludges, the contaminan ...


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Ronald C Hallett, Stephen R Cater, Keith G Bircher, J Adele Buckley, R D Samuel Stevens: UV reactor assembly with improved lamp cooling means. Solarchem Enterprises, Lowe Price LeBlanc & Becker, December 13, 1994: US05372781 (31 worldwide citation)

A reactor assembly is provided for destroying contaminants in fluids by the application of UV radiation to promote the destruction of the contaminants. The reactor assembly has a vertically orientated reactor chamber with a centrally located lamp emitting UV radiation and operating at temperatures i ...


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James R Bolton, R D Samuel Stevens: Method for preventing replication in Cryptosporidium parvum using ultraviolet light. Calgon Carbon Corporation, Cohen & Grigsby P C, October 10, 2000: US06129893 (17 worldwide citation)

A method for prevention of cryptosporidium oocysts and similar organisms in water by irradiating the water with ultraviolet light in a range of 200 to 300 nm in doses of about 10 mJ/cm.sup.2 to 175 mJ/cm.sup.2.


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R D Samuel Stevens: Process for reduction of the content of SO.sub.2 and/or NO.sub.x in flue gas. Concord Scientific Corporation, Ridout & Maybee, November 22, 1983: US04416748 (14 worldwide citation)

The content of SO.sub.2 and/or NO.sub.x in flue gas is reduced by irradiating the flue gas in admixture with NH.sub.3 with ultraviolet at wavelengths between 170 and 220 nm.


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R D Samuel Stevens, Stephen R Carter: Oxidation and photoxidation process. Solarchem Enterprises, Rogers Bereskin & Parr, September 11, 1990: US04956098 (8 worldwide citation)

An improved oxidation and photooxidation process for treating water containing an oxidizable contaminant. In one embodiment, the organic compound does not have an electron donating aromatic group. A stochiometric excess amount of a calcium salt is added to precipitate carbonate and bicarbonate ions ...


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R D Samuel Stevens, Stephen R Cater: Oxidation and photooxidation process. Solarchem Enterprises, Bereskin & Parr, April 14, 1992: US05104550 (5 worldwide citation)

An improved oxidation and photooxidation process for treating water containing an oxidizable contaminant. In one embodiment, the organic compound does not have an electron donating aromatic group. A stochiometric excess amount of a calcium salt is added to precipitate carbonate and bicarbonate ions ...


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