Patents Represented by Attorney, Agent or Law Firm Thomas W Steinberg
-
Patent number: 6177196Abstract: Fluorinated vinyl ethers having phosphorus-containing groups are useful as monomers in making fluoropolymers having functional sites.Type: GrantFiled: February 23, 1999Date of Patent: January 23, 2001Assignee: E. I. du Pont de Nemours and CompanyInventors: Paul Douglas Brothers, Ming-Hong Hung, Michael Joseph Michalczyk, Tatsuhiro Takahashi
-
Patent number: 6166138Abstract: 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: GrantFiled: July 13, 1998Date of Patent: December 26, 2000Assignee: E. I. du Pont de Nemours and CompanyInventor: Robert Joseph Kolouch
-
Patent number: 6140410Abstract: 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: GrantFiled: July 13, 1998Date of Patent: October 31, 2000Assignee: E. I. du Pont de Nemours and CompanyInventor: Robert Joseph Kolouch
-
Patent number: 6127478Abstract: 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: GrantFiled: January 22, 1999Date of Patent: October 3, 2000Assignee: E. I. du Pont de Nemours and CompanyInventor: Peter Dwight Spohn
-
Patent number: 6123999Abstract: 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: GrantFiled: March 17, 1998Date of Patent: September 26, 2000Assignee: E. I. du Pont de Nemours and CompanyInventors: Vinci Martinez Felix, Pidatala Krishna Mohan, William Francis McHale
-
Patent number: 6114028Abstract: 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: GrantFiled: January 8, 1999Date of Patent: September 5, 2000Assignee: E. I. du Pont de Nemours and CompanyInventors: Jay Z. Muchin, Kenneth Batzar, Thomas J. Leck
-
Patent number: 6114441Abstract: 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: GrantFiled: January 22, 1999Date of Patent: September 5, 2000Assignee: E. I. du Pont de Nemours and CompanyInventors: Peter Dwight Spohn, Pallatheri Manackal Subramanian
-
Patent number: 6103361Abstract: 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: GrantFiled: September 1, 1998Date of Patent: August 15, 2000Assignee: E. I. du Pont de Nemours and CompanyInventors: Kenneth Batzar, Jeffrey Hugh Hamilton, Alan C. Herzer, Thomas J. Leck, Christopher Mark Rey
-
Patent number: 6013719Abstract: 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: GrantFiled: June 15, 1998Date of Patent: January 11, 2000Assignee: E. I. du Pont de Nemours and CompanyInventor: Jacob Lahijani
-
Patent number: 5830346Abstract: 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: GrantFiled: August 30, 1995Date of Patent: November 3, 1998Assignee: Mobil Oil CorporationInventors: Mohsen N. Harandi, Paul H. Schipper, David S. Shihabi, Scott A. Stevenson
-
Patent number: 5824835Abstract: 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: GrantFiled: February 3, 1995Date of Patent: October 20, 1998Assignee: Mobil Oil CorporationInventors: Pradyot A. Agaskar, Tracy J. Huang
-
Patent number: 5808161Abstract: 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: GrantFiled: December 4, 1995Date of Patent: September 15, 1998Assignee: Mobil Oil CorporationInventors: Stephen H. Brown, Jeffrey C. Trewella
-
Patent number: 5785933Abstract: 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: GrantFiled: January 21, 1997Date of Patent: July 28, 1998Assignee: Mobil Oil CorporationInventors: Brian A. Cunningham, Saverio G. Greco
-
Patent number: 5780703Abstract: 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: GrantFiled: August 9, 1995Date of Patent: July 14, 1998Assignee: Mobil Oil CorporationInventors: Clarence D. Chang, Stuart D. Hellring, David O. Marler, Jose G. Santiesteban, James C. Vartuli
-
Patent number: 5763727Abstract: 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: GrantFiled: February 1, 1993Date of Patent: June 9, 1998Assignee: Mobil Oil CorporationInventors: Nick A. Collins, Mohsen N. Harandi
-
Patent number: 5714640Abstract: 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: GrantFiled: January 21, 1994Date of Patent: February 3, 1998Assignee: Mobil Oil CorporationInventors: Weldon K. Bell, Stephen H. Brown, Frederick E. Daugherty, Mohsen N. Harandi, Jeffrey C. Trewella
-
Patent number: 5705729Abstract: 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: GrantFiled: November 22, 1995Date of Patent: January 6, 1998Assignee: Mobil Oil CorporationInventor: Tracy J. Huang
-
Patent number: 5656151Abstract: 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: GrantFiled: December 5, 1994Date of Patent: August 12, 1997Assignee: Mobil Oil CorporationInventors: Bruce D. McLaughlin, Yiing-Mei Wu
-
Patent number: 5656152Abstract: 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: GrantFiled: December 5, 1994Date of Patent: August 12, 1997Assignee: Mobil Oil CoporationInventors: Bruce D. McLaughlin, Yiing-Mei Wu
-
Patent number: 5651877Abstract: 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: GrantFiled: April 16, 1996Date of Patent: July 29, 1997Assignee: Mobil Oil CorporationInventors: Ronald M. Gould, Harold A. Kloczewski, Krishna S. Menon, Thomas E. Sulpizio, Lloyd S. White