Patents by Inventor Gary R. Blackburn
Gary R. Blackburn has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6010617Abstract: A process for reducing the mutagenicity of a coal-tar-based product containing polynuclear aromatic compounds. The process includes the step of contacting the coal-tar-based product in the presence of an alkylating agent with an acid catalyst under alkylation conditions sufficient to reduce the mutagenicity of the polynuclear aromatic containing coal-tar-based material to a level less than the initial mutagenicity index value. Also provided are non-carcinogenic coal-tar-derived products.Type: GrantFiled: June 6, 1994Date of Patent: January 4, 2000Assignee: Mobil Oil CorporationInventors: Carl R. Mackerer, Timothy A. Roy, Gary R. Blackburn
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Patent number: 5488193Abstract: A process for reducing the mutagenicity of a polynuclear aromatic containing material containing from three to seven fused aromatic rings, especially a hydrocarbon refinery stream. The process reduces the initial mutagenicity index to a lower value by alkylating the compound with an alkylating agent which introduces an alkyl substituent having from three to five carbon atoms into the aromatic compound in the presence of an acid catalyst under alkylation conditions.Type: GrantFiled: January 25, 1995Date of Patent: January 30, 1996Assignee: Mobil Oil CorporationInventors: Carl R. Mackerer, Timothy A. Roy, Gary R. Blackburn
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Patent number: 5308470Abstract: Non-carcinogenic asphalts and asphalt blending stocks are produced from reduced hydrocarbon feedstocks. Such non-carcinogenic products are produced by establishing a functional relationship between mutagenicity index and a physical property correlative of hydrocarbon type for the asphalt or asphalt blending stock and determining a critical physical property level which, when achieved, results in a product having a mutagenicity index of less than about 1.0. Process conditions are established so that a product stream achieving the desired physical property level can be produced. Non-carcinogenic asphalts and asphalt blending stocks are then processed utilizing the conditions so established.Type: GrantFiled: December 23, 1992Date of Patent: May 3, 1994Assignee: Mobil Oil Corp.Inventors: Gary R. Blackburn, Carl R. Mackerer, Timothy A. Roy
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Patent number: 5178747Abstract: Non-carcinogenic bright stock extracts and/or deasphalted oils are produced from reduced hydrocarbon feedstocks. Such non-carcinogenic products are produced by establishing a functional relationship between mutagenicity index and a physical property correlative of hydrocarbon type for the bright stock extract or deasphalted oil and determining a critical physical property level which, when achieved, results in a product having a mutagenicity index of less than about 1.0. Process conditions are established so that a product stream achieving the desired physical property level can be produced. Non-carcinogenic bright stock extracts and/or deasphalted oils are then processed utilizing the conditions so established. A bright stock extract and a deasphalted oil substantially free from mutagenic activity, as well as processes for their production are also provided herein.Type: GrantFiled: July 22, 1991Date of Patent: January 12, 1993Assignee: Mobil Oil CorporationInventors: Gary R. Blackburn, Carl R. Mackerer, Nigel Searle, Arshavir E. Mekitarian, Edward N. Ladov
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Patent number: 5034119Abstract: Non-carcinogenic bright stock extracts and/or deasphalted oils are produced from reduced hydrocarbon feedstocks. Such non-carcinogenic products are produced by establishing a functional relationship between mutagenicity index and a physical property correlative of hydrocarbon type for the bright stock extract or deasphalted oil and determining a critical physical property level which, when achieved, results in a product having a mutagenicity index of less than about 1.0. Process conditions are established so that a product stream achieving the desired physical property level can be produced. Non-carcinogenic bright stock extracts and/or deasphalted oils are then processed utilizing the conditions so established. A bright stock extract and a deasphalted oil substantilly free from mutagenic activity, as well as processes for their production are also provided herein.Type: GrantFiled: March 28, 1989Date of Patent: July 23, 1991Assignee: Mobil Oil CorporationInventors: Gary R. Blackburn, Carl R. Mackerer, Nigel Searle, Arshavir E. Mekitarian, Edward N. Ladov
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Patent number: 4968323Abstract: 1-Bromopinacolone is a microbial biocide that is highly effective in suppressing the growth of bacteria, fungi and algae which can occur during storage and use of hydrocarbon oils including gasoline, jet fuel and heating oil. It is particularly effective in emulsifiable oils for metal working, such as cutting oils and rolling oils.Type: GrantFiled: April 3, 1989Date of Patent: November 6, 1990Assignee: Mobil Oil CorporationInventors: Gary R. Blackburn, Carl R. Mackerer
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Patent number: 4943521Abstract: A method for rapidly and reliably determining the potential carcinogenic activity of hydrocarbon mixtures which is especially useful for those of petroleum origin. A sample of the mixture is nitrated under conditions effective to convert the polynuclear aromatic hydrocarbons to their nitrated derivatives, and without separation of the nitrated components, the product is incubated with an inoculum of Salmonella typhimurium tester strain T98. The excessive production of revertant colonies is a measure of the mutagenic activity of the oil, and this measure is shown to correlate with dermal carcinogenic activity.Type: GrantFiled: February 24, 1987Date of Patent: July 24, 1990Assignee: Mobil Oil CorporationInventors: Gary R. Blackburn, Carl R. Mackerer, Ceinwen A. Schreiner
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Patent number: 4891322Abstract: A very rapid, sensitive method if provided for determination of the potential mutagenicity and/or carcinogenicity of certain petroleum oils by nitration of the oil and comparison of the light absorbance of its nitrated material with that obtained from one or more oils of known mutagenicity and/or carcinogenicity.Type: GrantFiled: February 24, 1987Date of Patent: January 2, 1990Assignee: Mobil Oil CorporationInventors: Gary R. Blackburn, Carl R. Mackerer, Ceinwen A. Schreiner
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Patent number: 4770998Abstract: This invention provides a biochemical method for determining the presence of toxic or mutagenic aldehyde in a test article. A sample of the test article is treated with an aldehyde dehydrogenase, such as formaldehyde dehydrogenase, and the change of growth characteristics of an indicator cell produced by the treatment are used for the determination.Type: GrantFiled: July 11, 1985Date of Patent: September 13, 1988Assignee: Mobil Oil CorporationInventors: Gary R. Blackburn, John F. Dooley, Carl R. Mackerer, Ceinwen A. Schreiner
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Patent number: 4499187Abstract: A method is provided for rapidly and reliably determining the potential carcinogenic activity of hydrocarbon mixtures which is especially useful for those of petroleum origin. A sample of the mixture is extracted with dimethylsulfoxide (DMSO). An inoculum of Salmonella typhimurium tester strain T98 is incubated in the presence of an aliquot of the extract together with an optimal amount of induced rat liver homogenate S9. The excessive production of revertant colonies is a measure of the mutagenic activity of the oil, and this measure is shown to correlate with dermal carcinogenic activity.Type: GrantFiled: January 30, 1984Date of Patent: February 12, 1985Assignee: Mobil Oil CorporationInventors: Gary R. Blackburn, Carl R. Mackerer, Ceinwen A. Schreiner