Patents by Inventor Karim Zahedi
Karim Zahedi 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: 11191343Abstract: The invention is a table top filtration device designed to filter noxious fumes on or near the table. In one embodiment, the tables are manicure and pedicure tables.Type: GrantFiled: May 13, 2019Date of Patent: December 7, 2021Assignee: Healthy Air, Inc.Inventors: Arya J. Zahedi, Karim Zahedi
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Publication number: 20190343264Abstract: The invention is a table top filtration device designed to filter noxious fumes on or near the table. In one embodiment, the tables are manicure and pedicure tables.Type: ApplicationFiled: May 13, 2019Publication date: November 14, 2019Applicant: Healthy Air, Inc.Inventors: Arya J. Zahedi, Karim Zahedi
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Patent number: 9040008Abstract: Apparatus and method for removal of particles and VOC from an airstream, in which particles carried by the airstream are charged by a corona ionizer and then collected by an electrically enhanced filter downstream of the ionizer. A catalytic filter downstream of the electrically enhanced filter removes VOC as well as ozone generated by the ionizer.Type: GrantFiled: November 17, 2014Date of Patent: May 26, 2015Assignee: EFB, Inc.Inventor: Karim Zahedi
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Publication number: 20150071842Abstract: Apparatus and method for removal of particles and VOC from an airstream, in which particles carried by the airstream are charged by a corona ionizer and then collected by an electrically enhanced filter downstream of the ionizer. A catalytic filter downstream of the electrically enhanced filter removes VOC as well as ozone generated by the ionizer.Type: ApplicationFiled: November 17, 2014Publication date: March 12, 2015Inventor: Karim ZAHEDI
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Patent number: 8889079Abstract: Apparatus and method for removal of particles and VOC from an airstream, in which particles carried by the airstream are charged by a corona ionizer and then collected by an electrically enhanced filter downstream of the ionizer. A catalytic filter downstream of the electrically enhanced filter removes VOC as well as ozone generated by the ionizer.Type: GrantFiled: January 12, 2011Date of Patent: November 18, 2014Assignee: EFB, Inc.Inventor: Karim Zahedi
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Publication number: 20110171094Abstract: Apparatus and method for removal of particles and VOC from an airstream, in which particles carried by the airstream are charged by a corona ionizer and then collected by an electrically enhanced filter downstream of the ionizer. A catalytic filter downstream of the electrically enhanced filter removes VOC as well as ozone generated by the ionizer.Type: ApplicationFiled: January 12, 2011Publication date: July 14, 2011Inventor: KARIM ZAHEDI
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Patent number: 7318288Abstract: A pollution abatement apparatus comprises an electrified filter bed preceded by a cyclonic mix chamber to remove wood fines and fly ash in a flue gas stream from a wood chip dryer heated by hot gas from an energy system that includes a wood waste combustor. The cyclonic mix chamber has dual inlets, one supplied with flue gas from the dryer and the other supplied with hot gas from the energy system.Type: GrantFiled: March 17, 2006Date of Patent: January 15, 2008Inventors: Karim Zahedi, Arya Zahedi
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Publication number: 20070214676Abstract: A pollution abatement apparatus comprises an electrified filter bed preceded by a cyclonic mix chamber to remove wood fines and fly ash in a flue gas stream from a wood chip dryer heated by hot gas from an energy system that includes a wood waste combustor. The cyclonic mix chamber has dual inlets, one supplied with flue gas from the dryer and the other supplied with hot gas from the energy system.Type: ApplicationFiled: March 17, 2006Publication date: September 20, 2007Inventors: Karim Zahedi, Arya Zahedi
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Patent number: 6974494Abstract: Pollutants in a flue gas stream from a dryer of products, such as wood chips, are removed by a pollution abatement system that includes an electrified filter bed unit for removing solid particulates. To prevent deteriorated operation of the electrified filter bed unit due to condensation of volatile organic compounds, the flue gas stream is heated, prior to admission to the electrified filter bed unit, to a temperature sufficient to convert condensable liquid aerosols to a gaseous state. The electrified filter bed unit then removes solid particulate selectively without collecting condensable organics. After the flue gas stream has passed through the electrified filter bed unit, gaseous pollutants can be removed by an oxidation process, for example.Type: GrantFiled: October 25, 2004Date of Patent: December 13, 2005Inventor: Karim Zahedi
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Patent number: 4668489Abstract: A gaseous constituent such as SO.sub.2, HCl, or HF is removed from a gas stream in a granular bed filter containing granules coated with a sorbent material which is reactive with the gaseous constituent. Granules carrying reacted sorbent material are removed from the granular bed filter, cleaned of reacted sorbent material and coated with further sorbent material for reuse in the granular bed filter. Electrification of the filter bed permits simultaneous, highly efficient removal of particulates entrained in the gas stream.Type: GrantFiled: April 3, 1985Date of Patent: May 26, 1987Assignee: EFB Inc.Inventors: Jeffrey Alexander, Karim Zahedi
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Patent number: 4542000Abstract: A gaseous constituent, such as sulfur dioxide, is removed from a gas stream in a granular bed filter containing granules coated with a sorbent material which is reactive with the gaseous constituent. Granules carrying reacted sorbent material are removed from the granular bed filter, cleaned of reacted sorbent material and coated with further sorbent material for reuse in the granular bed filter. Electrification of the filter bed permits simultaneous, highly efficient removal of particulates entrained in the gas stream.Type: GrantFiled: January 30, 1984Date of Patent: September 17, 1985Assignee: EFB, Inc.Inventors: Jeffery C. Alexander, Karim Zahedi
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Patent number: 4505723Abstract: Electrified filter bed apparatus includes inner and outer cylindrical bed-retaining structures for confining a granular bed therebetween. The inner cylindrical structure may comprise a cage of superposed frusto-conical louvers and the outer structure may comprise a similar cage or a perforated cylindrical, liquid-drainage sheet. A cylindrical bed electrode for electrically charging the bed granules is suspended between the retaining structures. The tubular bed surrounds an internal gas passage from which polluted gas flows through the bed from the inside out. Gas enters the internal passage from above through an ionizer section of the apparatus. The ionizer section may include a disc-type ionizer assembly in an ionizer tube. The tube may form an extension of the inner louver cage. A corona discharge may be formed between the disc and the ionizer tube by providing electric current to the discs, whereby the corona discharge electrically charges particulate material within the gas stream.Type: GrantFiled: June 24, 1983Date of Patent: March 19, 1985Assignee: EFB Inc.Inventors: Karim Zahedi, Jeffrey C. Alexander, Peter B. Zieve
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Patent number: 4374652Abstract: Fly ash and fine dust in a gas stream from a coal combustor, for example, are efficiently collected in a 2-stage, tubular, granular bed filter. The stages of the filter are arranged one above the other so that the granules may move from the upper stage to the lower stage under the influence of gravity. Larger particulate in the gas stream is first collected by the lower stage, and then the remaining particulate is electrically charged and collected by the upper stage. Both stages are electrified sufficiently to rigidify the granular beds and adhere the particulate to the granules, so that the granules and the collected particulate move downwardly through the filters as a plug. Granules that exit from the lower stage are cleaned and returned to the upper stage. Non-porous granules may be used to prevent fine particulate from becoming embedded in the granules.Type: GrantFiled: August 20, 1981Date of Patent: February 22, 1983Assignee: EFB Inc.Inventors: Karim Zahedi, Jeffrey C. Alexander
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Patent number: 4308036Abstract: Fly ash and fine dust in a gas stream from a coal combustor, for example, are efficiently collected in a 2-stage, tubular, granular bed filter. The stages of the filter are arranged one above the other so that the granules may move from the upper stage to the lower stage under the influence of gravity. Larger particulate in the gas stream is first collected by the lower stage, and then the remaining particulate is electrically charged and collected by the upper stage. Both stages are electrified sufficiently to rigidify the granular beds and adhere the particulate to the granules, so that the granules and the collected particulate move downwardly through the filters as a plug. Granules that exit from the lower stage are cleaned and returned to the upper stage. Non-porous granules may be used to prevent fine particulate from becoming embedded in the granules.Type: GrantFiled: August 23, 1979Date of Patent: December 29, 1981Assignee: EFB Inc.Inventors: Karim Zahedi, Jeffrey C. Alexander
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Patent number: 4154585Abstract: A fluidized bed, particulate collector system wherein, in one embodiment, the bed particles have applied thereto at the surface thereof, an additive that serves to adhere particulate, once collected, to the bed particles. The bed particles and/or additive may be combustible or may be incombustible. In one embodiment, the system includes two fluidized beds, in tandem, the first of which collects particulate mostly in the supermicron sizes and the second of which is an electrofluidized bed that collects particulate mostly in the submicron sizes.Type: GrantFiled: March 28, 1977Date of Patent: May 15, 1979Assignee: Massachusetts Institute of TechnologyInventors: James R. Melcher, Jeffrey C. Alexander, Karim Zahedi
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Patent number: 4146371Abstract: An electrofluidized bed agglomerator and method of agglomerating which comprises agglomerating submicron (and/or supermicron) particulates with a liquid, said liquid acting as a bond between particulates of the agglomerate thus formed to maintain the integrity thereof.Type: GrantFiled: October 25, 1977Date of Patent: March 27, 1979Assignee: Massachusetts Institute of TechnologyInventors: James R. Melcher, Jeffrey C. Alexander, Karim Zahedi
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Patent number: 4144359Abstract: Pollutant emissions produced in the manufacture of asphaltic roofing are controlled by the use of electrified bed filters. Filter bed granules coated with pollutants are removed from the beds periodically and are used in the manufacture of the roofing. A prefilter is employed to remove varnishing pollutant components in the supermicron size range to prevent fouling of an electrical charger.Type: GrantFiled: November 22, 1977Date of Patent: March 13, 1979Assignee: EFB Inc.Inventors: Karim Zahedi, Jeffery Alexander, Peter Zieve
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Patent number: 4038049Abstract: Apparatus for the high performance collection of gas entrained particulate, especially submicron particulate, consisting of a fluidized bed of collection sites with an electric field imposed on the bed so that the particulate to be collected, which is charged prior to entering the bed with the fluidizing gas, is electrically induced to agglomerate with the bed particles and the collected matter is removed in a fluidized state with the bed particles, which can consist of the collected material itself.Type: GrantFiled: October 18, 1974Date of Patent: July 26, 1977Assignee: Massachusetts Institute of TechnologyInventors: James R. Melcher, Kenneth S. Sachar, Karim Zahedi