Patents by Inventor Yiannis Levendis

Yiannis Levendis 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).

  • Patent number: 9738524
    Abstract: Methods and apparatus to generate carbon nanostructures from organic materials are described. Certain embodiments provide solid waste materials into a furnace, that pyrolyzes the solid waste materials into gaseous decomposition products, which are then converted to carbon nanostructures. Methods and apparatuses described herein provide numerous advantages over conventional methods, such as cost savings, reduction of handling risks, optimization of process conditions, and the like.
    Type: Grant
    Filed: June 8, 2015
    Date of Patent: August 22, 2017
    Assignees: Nano-C, Inc., Northeastern University
    Inventors: Yiannis Levendis, Henning Richter, Chuanwei Zhuo
  • Patent number: 9664382
    Abstract: Disclosed herein are systems and methods for the conversion of solid organic waste material, such as waste plastics, into fuel for the generation of heat and power. In addition, embodiments of the systems and methods disclosed herein relate to converting solid organic waste material into a gasified material for mixing with an oxidizing gas to allow for clean combustion of the fuel, thereby minimizing emissions of pollutants.
    Type: Grant
    Filed: December 5, 2011
    Date of Patent: May 30, 2017
    Assignee: NORTHEASTERN UNIVERSITY
    Inventors: Christopher Flanagan, Anna Craver, Brittne Rose Lynn, Mason Riley, Katherine Dixon, Chuanwei Zhuo, Yiannis Levendis
  • Publication number: 20160367971
    Abstract: Methods for activating the surface of steel alloys to produce catalytic substrates for the synthesis of carbon nanomaterials by chemical vapor deposition are provided. Steel alloy substrates in a variety of forms are activated by brief (10 sec to 30 min) pre-treatment at high temperature (600-1000° C.) in an oxidizing environment (e.g., air) to activate the catalyst. Upon high temperature oxidative treatment, the initially smooth and protective chromium oxide coating layer of the steel alloy is destroyed, and the catalyst surface roughness progressively increases. Upon exposure of the pre-treated SS substrates to pyrolyzed hydrocarbon gases in nitrogen, carbon nanotubes are readily formed, and their diameters correlate with substrate surface roughness. Forests of vertically aligned nanotubes can be prepared with the method.
    Type: Application
    Filed: July 30, 2014
    Publication date: December 22, 2016
    Inventors: Chuanwei Zhuo, Yiannis Levendis
  • Publication number: 20150266738
    Abstract: Methods and apparatus to generate carbon nanostructures from organic materials are described. Certain embodiments provide solid waste materials into a furnace, that pyrolyzes the solid waste materials into gaseous decomposition products, which are then converted to carbon nanostructures. Methods and apparatuses described herein provide numerous advantages over conventional methods, such as cost savings, reduction of handling risks, optimization of process conditions, and the like.
    Type: Application
    Filed: June 8, 2015
    Publication date: September 24, 2015
    Inventors: Yiannis LEVENDIS, Henning RICHTER, Chuanwei ZHUO
  • Patent number: 9051185
    Abstract: Methods and apparatus to generate carbon nanostructures from organic materials are described. Certain embodiments provide solid waste materials into a furnace, that pyrolyzes the solid waste materials into gaseous decomposition products, which are then converted to carbon nanostructures. Methods and apparatuses described herein provide numerous advantages over conventional methods, such as cost savings, reduction of handling risks, optimization of process conditions, and the like.
    Type: Grant
    Filed: March 26, 2010
    Date of Patent: June 9, 2015
    Assignees: Northeastern University, Nano-C Inc.
    Inventors: Yiannis Levendis, Henning Richter, Chuanwei Zhuo
  • Publication number: 20140109545
    Abstract: Disclosed herein are systems and methods for the conversion of solid organic waste material, such as waste plastics, into fuel for the generation of heat and power. In addition, embodiments of the systems and methods disclosed herein relate to converting solid organic waste material into a gasified material for mixing with an oxidizing gas to allow for clean combustion of the fuel, thereby minimizing emissions of pollutants.
    Type: Application
    Filed: December 5, 2011
    Publication date: April 24, 2014
    Applicant: NORTHEASTERN UNIVERSITY
    Inventors: Christopher Flanagan, Anna Craver, Brittne Rose Lynn, Mason Riley, Katherine Dixon, Chuanwei Zhuo, Yiannis Levendis
  • Publication number: 20120219489
    Abstract: Methods and apparatus to generate carbon nanostructures from organic materials are described. Certain embodiments provide solid waste materials into a furnace, that pyrolyzes the solid waste materials into gaseous decomposition products, which are then converted to carbon nanostructures. Methods and apparatuses described herein provide numerous advantages over conventional methods, such as cost savings, reducion of handling risks, optimization of process conditions, and the like.
    Type: Application
    Filed: March 26, 2010
    Publication date: August 30, 2012
    Applicant: Northeastern University
    Inventors: Yiannis Levendis, Henning Richter, Chuanwei Zhuo
  • Patent number: 6143370
    Abstract: A process for forming polymer coatings on the surfaces of objects, e.g., medical stents, is disclosed. The coatings formed by the process of the invention comprise small spherical, spheroidal or irregular shape polymer particles, which may be adhered together. Coatings may have high porosity and high surface area.
    Type: Grant
    Filed: August 26, 1998
    Date of Patent: November 7, 2000
    Assignee: Northeastern University
    Inventors: Thomai Panagiotou, Yiannis Levendis
  • Patent number: 5785936
    Abstract: A method for the simultaneous control of SO.sub.2, NO.sub.x, HCl, air toxins, metal fumes, and particulate emissions (ash, soot, metal oxides) from fossil fuel burning combustion processes is provided by injecting a sorbent upstream of a filter in the furnace and collecting sorbent and particulates in the filter. Collecting the sorbent in the filter increases its residence time in the process. The sorbent is injected in the post-flame region of a furnace, where it reacts with the SO.sub.2, the NO.sub.x, the HCl, and the air toxics in the effluent gas. A surface filter that can withstand temperatures of approximately 1000.degree. C. is mounted, either fixedly or rotatably, in the furnace downstream of the sorbent injection region. The gas flows through the filter, and the sorbent and other particulates become embedded in the surface layer of the filter.
    Type: Grant
    Filed: November 12, 1996
    Date of Patent: July 28, 1998
    Assignee: Northeastern University
    Inventor: Yiannis A. Levendis
  • Patent number: 5426936
    Abstract: A diesel engine exhaust gas recirculation system for control of NO.sub.x emissions is disclosed in hi h total particulate (soot, condensed polynuclear aromatic and aliphatic hydrocarbons, and ash) control system is employed to filter the exhaust gas prior to reintroduction to the diesel engine. By cleaning the recirculated exhaust gas of substantially all particulates, wear on the engine due to particulate abrasion is minimized, and NO.sub.x and particulate emissions are reduced. The particulate control system includes a high efficiency ceramic monolith trap that is periodically regenerated by one or more pulses of high-pressure air that move in the opposite direction of the engine exhaust flow through the trap. In one embodiment, a portion of the filtered diesel exhaust is recirculated to the engine. In a further embodiment, the particulate control system filters a portion of the diesel exhaust in the recirculation flow path. The system can retrofit any existing diesel-powered equipment.
    Type: Grant
    Filed: June 17, 1993
    Date of Patent: June 27, 1995
    Assignees: Northeastern University, Ceramem Corporation
    Inventors: Yiannis A. Levendis, Richard F. Abrams
  • Patent number: 5390492
    Abstract: A flow-through particulate incineration system is coupled to an aerodynamically regenerated diesel engine exhaust gas particulate (soot, condensed polynuclear aromatic and aliphatic hydrocarbons, and ash) trap. An incineration chamber is provided downstream of the particulates dislodged from the particulate trap during regeneration thereof by a pulse of compressed air. During regeneration, a valve between the particulate trap and the incineration chamber opens to allows the air and entrained particles to pass into the incineration chamber. A secondary filter is mounted within the incineration chamber to allow passage of the regeneration air therethrough, but prevent passage of the particulates, whereby the particulates are retained in the incineration chamber. A heater in the incineration chamber is periodically activated to burn the particulates collected in the trap. The oxidation products may be exhausted to ambient or may be returned to the engine intake in an exhaust gas recirculation system.
    Type: Grant
    Filed: February 25, 1994
    Date of Patent: February 21, 1995
    Assignee: Northeastern University
    Inventor: Yiannis A. Levendis
  • Patent number: 5352423
    Abstract: A method is disclosed for removing pollutants from the exhaust of combustion systems burning fuels containing substantial amounts of sulfur and nitrogen. An exemplary method of the invention involves the formation and reaction of a sorbent comprising calcium benzoate. The calcium benzoate is either dry-sprayed (in the form of a fine powder) or wet-sprayed in an aqueous solution in a high temperature environment such as a combustion chamber. The latter technique is feasible since calcium benzoate is a water-soluble form of calcium. When the dispersed particles of calcium benzoate are heated to a high temperature, the organic benzoate burns off and fine calcium oxide particles are formed. These particles are cenospheric (hollow) and have thin and highly porous walls, thus, affording optimum external and internal accessibility for reacting with toxic gaseous emissions such as SO.sub.2. Further, the combustion of the organic benzoate portion of the sorbent results in the conversion of NO.sub.x to N.sub.2.
    Type: Grant
    Filed: March 30, 1993
    Date of Patent: October 4, 1994
    Assignee: Northeastern University
    Inventors: Yiannis A. Levendis, Donald L. Wise
  • Patent number: 5312605
    Abstract: A method is disclosed for removing pollutants from the exhaust of combustion systems burning fuels containing substantial amounts of sulfur and nitrogen. An exemplary method of the invention involves the formation and reaction of a sorbent comprising calcium magnesium acetate (CMA). The CMA is either dry-sprayed (in the form of a fine powder) or wet-sprayed in an aqueous solution in a high temperature environment such as a combustion chamber. The latter technique is feasible since CMA is a uniquely water-soluble form of calcium and magnesium. When the dispersed particles of CMA are heated to a high temperature, fine calcium and magnesium oxide particles, which are hollow with thin and highly porous walls are formed, affording optimum external and internal accessibility for reacting with toxic gaseous emissions such as SO.sub.2. Further, the combustion of the organic acetate portion of the sorbent results in the conversion of NO.sub.x to N.sub.2.
    Type: Grant
    Filed: December 11, 1991
    Date of Patent: May 17, 1994
    Assignee: Northeastern University
    Inventors: Yiannis A. Levendis, Donald L. Wise
  • Patent number: 5269980
    Abstract: A process for producing spherical polymer particles which may be either monodisperse of a predetermined and controlled size, or polydisperse, using a liquid atomization technique. The process includes an aerosol generator to create a stream or multiple streams of liquid droplets sprayed into a thermal reactor. The aerosol generator sprays the feed solution which comprises liquid organic monomers or semi-polymerized monomers, a polymerization catalyst and optionally, a solvent, into the thermal reactor environment. The solvent evaporates allowing polymerization reactions to commence. Polymerization may proceed by a variety of methods. Polymerization is completed during the flight-time of the droplets and the solid polymer particles are collected at the bottom of the reactor.
    Type: Grant
    Filed: August 5, 1991
    Date of Patent: December 14, 1993
    Assignee: Northeastern University
    Inventors: Yiannis A. Levendis, Thomai Panagiotou, Richard Flagan
  • Patent number: 5253476
    Abstract: A simple, low cost and reliable total particulate (soot, polynuclear aromatic and aliphatic hydrocarbons and ash) control system is disclosed that separates the particulate burning process from the body of a particulate filter and that needs very little compressed air to regenerate. The system can retrofit any existing diesel-powered equipment. The particulate control system includes a stationary ceramic monolith trap that is regenerated by one or more pulses of high-pressure and low-velocity air that move in the opposite direction of the engine exhaust flow through the trap. The particulate control system in a single trap embodiment conducts the engine exhaust to the atmosphere during regeneration periods, and in a dual trap embodiment, conducts the engine exhaust through two traps that are operated alternatively such that while one is filtering the exhaust the other is being regenerated, and vice versa.
    Type: Grant
    Filed: February 21, 1992
    Date of Patent: October 19, 1993
    Assignee: Northeastern University
    Inventors: Yiannis A. Levendis, Najib Kahlil
  • Patent number: 5013340
    Abstract: A rotating particulate trap is disclosed, which may find application in diesel engines, air conditioning systems, industrial air-filters and the like. The invention includes a disk or cylinder which is formed from material suitable for filtering particulates which are present in the exhaust gases of diesel engines, gas turbines, industrial air or other particulate laden gases. The disk is mounted transversely in the exhaust duct of a diesel engine and in a fresh air duct which is disposed parallel to the exhaust duct. As the disk rotates within the exhaust duct, it filters particulates from the exhaust gases of the diesel engine. The filtered particulates are expelled from the disk by fresh air blowing in the air duct as the disk rotates within the air duct. The fresh air is blown in the air duct in a direction opposite to the flow of exhaust gases within the exhaust duct by a fan or compressor or compressed air jets.
    Type: Grant
    Filed: June 29, 1989
    Date of Patent: May 7, 1991
    Assignee: Northeastern University
    Inventors: Mohammad E. Taslim, Yiannis A. Levendis