Patents Represented by Attorney, Agent or Law Firm Thomas W Steinberg
  • Patent number: 6177196
    Abstract: Fluorinated vinyl ethers having phosphorus-containing groups are useful as monomers in making fluoropolymers having functional sites.
    Type: Grant
    Filed: February 23, 1999
    Date of Patent: January 23, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Paul Douglas Brothers, Ming-Hong Hung, Michael Joseph Michalczyk, Tatsuhiro Takahashi
  • Patent number: 6166138
    Abstract: Fluoropolymer compositions containing melt-fabricable functionalized fluoropolymer and liquid crystal polymer have enhanced adhesion to metal even at low concentrations of liquid crystal polymer.
    Type: Grant
    Filed: July 13, 1998
    Date of Patent: December 26, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Robert Joseph Kolouch
  • Patent number: 6140410
    Abstract: Fluoropolymer compositions containing melt-fabricable functionalized fluoropolymer and high temperature resistant thermoplastic adhesion promoter have enhanced adhesion to metal at low concentrations of high temperature resistant thermoplastic.
    Type: Grant
    Filed: July 13, 1998
    Date of Patent: October 31, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Robert Joseph Kolouch
  • Patent number: 6127478
    Abstract: A melt-mixed blend of polyamide and grafted fluoropolymer having polar functionality exhibits surprisingly low permeability and can bond to fluoropolymer or polyamide without an intervening adhesive layer. The blend is useful as a component of laminates, such as fuel hose.
    Type: Grant
    Filed: January 22, 1999
    Date of Patent: October 3, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Peter Dwight Spohn
  • Patent number: 6123999
    Abstract: A method for preparing a scratch and abrasion resistant surface on unroughened aluminum or stainless steel cookware, for subsequent coating with a nonstick polymer resin, such as a fluoropolymer, in a liquid and/or powder medium. The scratch and abrasion resistant surface consists of a thermally sprayed aluminum or stainless steel, respectively. A metal coated substrate produced by this method and an article subsequently coated with a fluoropolymer surface by this method are also described.
    Type: Grant
    Filed: March 17, 1998
    Date of Patent: September 26, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Vinci Martinez Felix, Pidatala Krishna Mohan, William Francis McHale
  • Patent number: 6114028
    Abstract: A coating containing flakes made of a thermally conductive material is disposed on the inner surface of the bottom of a cooking vessel. A first portion of the flakes is oriented in the plane of the inner surface and a second portion of the flakes is oriented in the thickness direction of the coating to form a heat conductive pattern. The flakes include flakes having a longest dimension that is greater than the thickness of the coating, thus improving heat transfer from the bottom of the cooking vessel to the upper surface of the coating. The heat conductive pattern includes a plurality of segments that extend outwardly from a center region of the inner surface toward an outer peripheral region. The outwardly extending segments improve heat transfer from the center region to the outer peripheral region, especially when the cooking vessel is heated by a heating element having a diameter smaller than the diameter of the cooking vessel bottom.
    Type: Grant
    Filed: January 8, 1999
    Date of Patent: September 5, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Jay Z. Muchin, Kenneth Batzar, Thomas J. Leck
  • Patent number: 6114441
    Abstract: A melt-mixed blend of thermoplastic polyester and grafted fluoropolymer having polar functionality exhibits good mechanical properties and is useful in articles for transport and containment of fuels and as a component of laminates, such as fuel hose.
    Type: Grant
    Filed: January 22, 1999
    Date of Patent: September 5, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Peter Dwight Spohn, Pallatheri Manackal Subramanian
  • Patent number: 6103361
    Abstract: Smooth, patterned substrates useful in producing decorative cookware are formed by coating a base with a mixture of fluoropolymer and magnetic flakes and magnetically inducing an image in the polymer coating composition. The baked fluoropolymer release coating contains magnetizable flakes, a portion of the flakes being oriented in the plane of the substrate and a portion of said flakes being magnetically reoriented to form a pattern in the coating which is observed in reflected light, the flakes having a longest dimension which is greater than the thickness of said coating. The patterned substrate is formed by applying magnetic force through the edges of a magnetizable die positioned under a coated base to induce an imaging effect or pattern. The coating composition is then cured resulting in a smooth surface, patterned nonstick finish on the substrate.
    Type: Grant
    Filed: September 1, 1998
    Date of Patent: August 15, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Kenneth Batzar, Jeffrey Hugh Hamilton, Alan C. Herzer, Thomas J. Leck, Christopher Mark Rey
  • Patent number: 6013719
    Abstract: Low melt viscosity polytetrafluorethylene (PTFE), i.e. having a melt viscosity of 50 to 1.times.10.sup.5 Pa.multidot.s at 372.degree. C., is combined with non-fluorinated thermally stable polymer such as polyarleneetherketone to provide melt-fabricability application for the low MV PTFE and provide improved properties for the thermally stable polymer.
    Type: Grant
    Filed: June 15, 1998
    Date of Patent: January 11, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Jacob Lahijani
  • Patent number: 5830346
    Abstract: Oxides of nitrogen (NO.sub.x) emissions from an FCC regenerator are reduced by operating the regenerator in partial CO burn mode to produce flue gas with more CO than O.sub.2 and with NO.sub.x precursors. This flue gas is then enriched with controlled amounts of oxygen and charged over catalyst, preferably Group VIII noble metal on a support, to convert most NO.sub.x precursors to nitrogen. Flue gas may then be charged to a CO boiler. Eliminating more than 90% of NO.sub.x emissions is possible by operating the FCC regenerator in partial CO burn mode, then adding air and catalytically converting NO.sub.x precursors at substoichiometric conditions. Conversion of NO.sub.x, if formed in the regenerator, may be achieved as well.
    Type: Grant
    Filed: August 30, 1995
    Date of Patent: November 3, 1998
    Assignee: Mobil Oil Corporation
    Inventors: Mohsen N. Harandi, Paul H. Schipper, David S. Shihabi, Scott A. Stevenson
  • Patent number: 5824835
    Abstract: The present invention provides a process for alkylating an olefin with an isoparaffin comprising contacting an olefin-containing feed with an isoparaffin-containing feed with a solid catalyst comprising zeolite Beta having a silica:alumina ratio in the as-synthesized state of less than about 18.
    Type: Grant
    Filed: February 3, 1995
    Date of Patent: October 20, 1998
    Assignee: Mobil Oil Corporation
    Inventors: Pradyot A. Agaskar, Tracy J. Huang
  • Patent number: 5808161
    Abstract: A process has been discovered to employ an inert or unreactive solvent in the liquid phase process for production of isopropyl alcohol and diisopropyl ether from a propylene-rich hydrocarbon feedstream and water where the process is carried out in contact with acidic aluminosilicate catalyst particles. When an inert solvent is used, oxygenates production is enhanced and catalyst productivity is substantially increased.
    Type: Grant
    Filed: December 4, 1995
    Date of Patent: September 15, 1998
    Assignee: Mobil Oil Corporation
    Inventors: Stephen H. Brown, Jeffrey C. Trewella
  • Patent number: 5785933
    Abstract: A sulfuric acid-catalyzed alkylation reactor system is provided for alkylating isoparaffins with olefins to produce hydrocarbon alkylates. The reactor vessel has a vertical cylindrical wall, a top, an inverted conical bottom portion, internal perforated baffles and multiple emulsion injection inlet pipes, disposed tangentially to and communicating with the interior of the reactor vessel. The emulsion injection inlet pipes have static mixers incorporated therein and tangential injection of the emulsion imparts a circular motion to the contents of the reactor vessel, resulting in partial phase separation of the reacted products. The reactor vessel communicates with a settling vessel through a transfer pipe having a vertical portion suspended within the central portion of the reactor vessel and a horizontal portion sealably extending through the cylindrical wall of the reactor vessel.
    Type: Grant
    Filed: January 21, 1997
    Date of Patent: July 28, 1998
    Assignee: Mobil Oil Corporation
    Inventors: Brian A. Cunningham, Saverio G. Greco
  • Patent number: 5780703
    Abstract: A process for converting at least one olefin and at least one isoparaffin to a diesel fuel blending component comprising the steps of contacting the olefin and the isoparaffin with a catalyst comprising an acidic solid comprising a Group IVB metal oxide modified with an oxyanion of a Group VIB metal to provide a diesel fuel. Process conditions can be varied to favor the formation of gasoline, distillate, lube range products or mixtures thereof.
    Type: Grant
    Filed: August 9, 1995
    Date of Patent: July 14, 1998
    Assignee: Mobil Oil Corporation
    Inventors: Clarence D. Chang, Stuart D. Hellring, David O. Marler, Jose G. Santiesteban, James C. Vartuli
  • Patent number: 5763727
    Abstract: A process is provided for the disproportionation of C.sub.3 -C.sub.5 paraffins. Propane, butanes and/or pentanes are reacted over a zeolite catalyst having a low acid activity in a turbulent fluidized bed reactor regenerator system operating at low to moderate pressures.
    Type: Grant
    Filed: February 1, 1993
    Date of Patent: June 9, 1998
    Assignee: Mobil Oil Corporation
    Inventors: Nick A. Collins, Mohsen N. Harandi
  • Patent number: 5714640
    Abstract: A condensation reaction process and reactor for converting a plurality of reactants to at least one reaction product having a vapor pressure less than the vapor pressure of the reactants. The process includes heating a liquid phase of the reactants to at least partial vaporization thus forming a vapor phase of the reactants. The vapor phase reactants are passed in a vapor and or condensed state through at least one catalyst bed spaced from the liquid state to form reaction product(s). The reaction product(s) is returned to the liquid phase without additional contact with catalyst.
    Type: Grant
    Filed: January 21, 1994
    Date of Patent: February 3, 1998
    Assignee: Mobil Oil Corporation
    Inventors: Weldon K. Bell, Stephen H. Brown, Frederick E. Daugherty, Mohsen N. Harandi, Jeffrey C. Trewella
  • Patent number: 5705729
    Abstract: An improved process for alkylation of isoparaffins with olefins to yield a product which includes a high proportion of highly branched alkylates for blending into gasolines is disclosed. The catalyst comprises a large pore zeolite such as USY which may be partially or fully exchanged with a cation or cations selected from the rare-earth metals.
    Type: Grant
    Filed: November 22, 1995
    Date of Patent: January 6, 1998
    Assignee: Mobil Oil Corporation
    Inventor: Tracy J. Huang
  • Patent number: 5656151
    Abstract: A process for determining if intermittent water injection is the best way to remove deposits such as salts from refinery process streams. A water vapor pressure, P1, at stream conditions and a water vapor pressure, Ps, at saturation conditions in the stream, are used to calculate a ratio P1/Ps. If the ratio is less than 0.1 intermittent water washing is preferred. An optimized intermittent injection procedure, frequency, duration, and constraints, is disclosed. Chemical speciation calculations ensure that all accumulated salts are removed, and that an aqueous phase forms downstream of the water injection point having a salt concentration within acceptable limits.
    Type: Grant
    Filed: December 5, 1994
    Date of Patent: August 12, 1997
    Assignee: Mobil Oil Corporation
    Inventors: Bruce D. McLaughlin, Yiing-Mei Wu
  • Patent number: 5656152
    Abstract: A continuous water washing process for removing salts from refinery process streams is disclosed. The salt and salt precursor content of a process stream is determined, and iterative calculations made to ensure an aqueous phase forms downstream of the water injection point with a salt and ion concentration within acceptable limits. Preferably chemical speciation calculations are used to check for corrosive, transient aqueous phases intermediate the point of water injection and the process outlet.
    Type: Grant
    Filed: December 5, 1994
    Date of Patent: August 12, 1997
    Assignee: Mobil Oil Coporation
    Inventors: Bruce D. McLaughlin, Yiing-Mei Wu
  • Patent number: 5651877
    Abstract: A semicontinuous process for solvent dewaxing a waxy petroleum oil feed stream including the steps of: diluting of the waxy oil feed stream with solvent; feeding cold oil/solvent/wax mixture to a filter to remove the wax and obtain an oil/solvent filtrate stream; contacting the oil/solvent filtrate stream with a selective semipermeable membrane to selectively transfer solvent through the membrane to obtain a solvent-rich permeate; and periodically directing a warm stream of recovered solvent onto the membrane surface to wash the membrane and remove impurities therefrom.
    Type: Grant
    Filed: April 16, 1996
    Date of Patent: July 29, 1997
    Assignee: Mobil Oil Corporation
    Inventors: Ronald M. Gould, Harold A. Kloczewski, Krishna S. Menon, Thomas E. Sulpizio, Lloyd S. White