Patents by Inventor Rengarajan Soundararajan
Rengarajan Soundararajan 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: 7335902Abstract: A urethane based polymer composition is provided that exhibits superior shielding properties during and after exposure to high level radiation. The composite is formed by mixing a liquid isocyanate monomer, preferably 4,4?-diisocyanate monomer with a liquid phenolic resin, preferably phenol formaldehyde resin, and a phosphate ester flame retardant. An optional pyridine catalyst may be added to shorten the cure time. The resulting composition cures at room temperature and can be utilized in several manners, including spraying or pouring the composition prior to curing over radioactive material to prevent leakage of radiation. The uncured composite can be sprayed on the walls of a room or container to prevent leakage of radiation and can also be used to contain radiation prior to demolition. The uncured composite can also be molded into bricks or panels for use in construction.Type: GrantFiled: August 13, 2004Date of Patent: February 26, 2008Assignee: Hanford Nuclear Services, Inc.Inventor: Rengarajan Soundararajan
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Publication number: 20080006784Abstract: A urethane based polymer composition is provided that exhibits superior shielding properties during and after exposure to high level radiation. The composite is formed by mixing a liquid isocyanate monomer, preferably 4,4?-diisocyanate monomer with a liquid phenolic resin, preferably phenol formaldehyde resin, and a phosphate ester flame retardant. An optional pyridine catalyst may be added to shorten the cure time. The resulting composition cures at room temperature and can be utilized in several manners, including spraying or pouring the composition prior to curing over radioactive material to prevent leakage of radiation. The uncured composite can be sprayed on the walls of a room or container to prevent leakage of radiation and can also be used to contain radiation prior to demolition. The uncured composite can also be molded into bricks or panels for use in construction.Type: ApplicationFiled: August 13, 2004Publication date: January 10, 2008Inventor: Rengarajan Soundararajan
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Publication number: 20050203229Abstract: A urethane based polymer composition is provided that exhibits superior shielding properties during and after exposure to high level radiation. The composite is formed by mixing a liquid isocyanate monomer, preferably 4,4?-diisocyanate monomer with a liquid phenolic resin, preferably phenol formaldehyde resin, and a phosphate ester flame retardant. An optional pyridine catalyst may be added to shorten the cure time. The resulting composition cures at room temperature and can be utilized in several manners, including spraying or pouring the composition prior to curing over radioactive material to prevent leakage of radiation. The uncured composite can be sprayed on the walls of a room or container to prevent leakage of radiation and can also be used to contain radiation prior to demolition. The uncured composite can also be molded into bricks or panels for use in construction.Type: ApplicationFiled: August 13, 2004Publication date: September 15, 2005Inventor: Rengarajan Soundararajan
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Patent number: 6805815Abstract: A urethane based polymer composition is provided that exhibits superior shielding properties during and after exposure to high level radiation. The composite is formed by mixing a liquid isocyanate monomer, preferably 4,4′-diisocyanate monomer with a liquid phenolic resin, preferably phenol formaldehyde resin, and a phosphate ester flame retardant. An optional pyridine catalyst may be added to shorten the cure time. The resulting composition cures at room temperature and can be utilized in several manners, including spraying or pouring the composition prior to curing over radioactive material to prevent leakage of radiation. The uncured composite can be sprayed on the walls of a room or container to prevent leakage of radiation and can also be used to contain radiation prior to demolition. The uncured composite can also be molded into bricks or panels for use in construction.Type: GrantFiled: February 1, 2001Date of Patent: October 19, 2004Assignee: Hanford Nuclear Service, Inc.Inventor: Rengarajan Soundararajan
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Publication number: 20040200997Abstract: A urethane based polymer composition is provided that exhibits superior shielding properties during and after exposure to high level radiation. The composite is formed by mixing a liquid isocyanate monomer, preferably 4,4′-diisocyanate monomer with a liquid phenolic resin, preferably phenol formaldehyde resin, and a phosphate ester flame retardant. An optional pyridine catalyst may be added to shorten the cure time. The resulting composition cures at room temperature and can be utilized in several manners, including spraying or pouring the composition prior to curing over radioactive material to prevent leakage of radiation. The uncured composite can be sprayed on the walls of a room or container to prevent leakage of radiation and can also be used to contain radiation prior to demolition. The uncured composite can also be molded into bricks or panels for use in construction.Type: ApplicationFiled: February 1, 2001Publication date: October 14, 2004Inventor: Rengarajan Soundararajan
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Patent number: 6518477Abstract: A method for remediating non-homogeneous radioactive waste to significantly reduce the waste mass/volume and to convert such waste to products that meet federal regulatory compliance standards is disclosed. High level waste (HLW) stored in underground tanks is typically a multi component mixture. After removal of the waste from the tanks or other storage areas the waste is isolated in a thermal desorption-type reaction vessel where the waste is pyrolized at pre-determined and carefully controlled temperatures, pressures, and atmospheres. This process eliminates organics, volatile metals, moisture and other low boiling temperature/high vapor pressure components and converts non-volatile waste to more stable metal oxides. Off-gas treatment systems scrub, treat and dispose of all off-gas components. A thermal desorption-type apparatus especially well suited for performing the method of the present invention is also disclosed.Type: GrantFiled: April 24, 2001Date of Patent: February 11, 2003Assignee: Hanford Nuclear Services, Inc.Inventor: Rengarajan Soundararajan
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Publication number: 20020010381Abstract: A method for remediating non-homogeneous radioactive waste to significantly reduce the waste mass/volume and to convert such waste to products that meet federal regulatory compliance standards is disclosed. High level waste (HLW) stored in underground tanks is typically a multi component mixture. After removal of the waste from the tanks or other storage areas the waste is isolated in a thermal desorption-type reaction vessel where the waste is pyrolized at pre-determined and carefully controlled temperatures, pressures, and atmospheres. This process eliminates organics, volatile metals, moisture and other low boiling temperature/high vapor pressure components and converts non-volatile waste to more stable metal oxides. Off-gas treatment systems scrub, treat and dispose of all off-gas components. A thermal desorption-type apparatus especially well suited for performing the method of the present invention is also disclosed.Type: ApplicationFiled: April 24, 2001Publication date: January 24, 2002Applicant: Hanford Nuclear Services, Inc.Inventor: Rengarajan Soundararajan
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Patent number: 4488952Abstract: A method of removing sulphur from coal prior to burning of the coal is the subject of the present invention. The coal is first comminuted to a size of no more than one inch and preferably one-half inch in diameter. The coal particles are placed in a reaction chamber in an aqueous suspension to which is added an inorganic base capable of reacting with hydrogen sulphide in order to neutralize the latter, such base preferably being calcium hydroxide. A photoelectric catalyst, characterized by structural imperfections to provide active sites for supporting a free radical reaction, is also introduced into the reaction chamber. The coal is then subjected to electromagnetic irradiation of a specific energy level in order to create a free radical reaction which results in removal of the sulphur from the coal. The coal is then cleaned and separated from the aqueous media, and the inorganic base and elemental sulphur are removed from the aqueous media.Type: GrantFiled: December 16, 1983Date of Patent: December 18, 1984Assignee: Research Manufacturing Consultation CorporationInventor: Rengarajan Soundararajan