Patents Represented by Attorney Grace Tsang
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Patent number: 6238906Abstract: A bacterial culture capable of degrading ethers, especially branched alkylethers including MTBE, under aerobic conditions has been prepared.Type: GrantFiled: April 14, 1999Date of Patent: May 29, 2001Assignee: Shell Oil CompanyInventor: Joseph Patrick Salanitro
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Patent number: 6232411Abstract: An epoxy compound formula (1), and a hydrogenation process for preparing thereof; wherein R1 to R4 each represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms; n represents an integer of 0 to 6; and Z1 and Z2 each represent a phenyl group substituted or unsubstituted by one or more alkyl groups or a cyclohexyl group substituted or unsubstituted by one or more alkyl groups.Type: GrantFiled: May 28, 1999Date of Patent: May 15, 2001Assignee: Mitsubishi Chemical Co.Inventors: Yoshinori Hara, Mareki Miura, Yoshinobu Ohnuma, Hiroko Takahashi
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Patent number: 6136944Abstract: The present invention relates to a flexible industrial adhesive composition which effectively bonds thermoplastic polymer substrates and substrates having low stiffness such as fabric, rubbers and asphaltic materials, to materials selected from metals, fabrics, rubbers, engineered materials, and concrete, said flexible industrial adhesive composition comprising:(a) one or more epoxy resin(s) having an average of at least 1.5 epoxy groups per molecule;(b) a liquid amine terminated polyamide prepared by reacting at least one C.sub.18-50 dicarboxylic acid and an aminoalkylpiperazine in a ratio of moles of aminoalkylpiperazine to equivalents of carboxyl group in the acid of greater than 0.75:1;(c) one or more optional polyamine(s); and(d) one or more optional filler(s);wherein the tensile modulus of the flexible industrial adhesive composition is less than 500,000 psi and the tensile elongation of the flexible industrial adhesive composition is greater than 10%.Type: GrantFiled: November 29, 1999Date of Patent: October 24, 2000Assignee: Shell Oil CompanyInventors: Steven Lee Stewart, Derek Scott Kincaid
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Patent number: 6127508Abstract: An epoxy resin composition containing a) an epoxy resin and b) a liquid amine terminated polyamine curing agent prepared by condensing an aminoalkylpiperazine and a dicarboxylic acid. The epoxy resin composition typically requires less than 35% of solvent to produce a sprayable viscosity. A hydroxy-functional flexibilized resin is also produced by reacting (a) an epoxy resin, (b) a liquid aminoalkylpiperazine-based amine terminated polyamine and (c) a hydroxy-functional amine.Type: GrantFiled: May 20, 1997Date of Patent: October 3, 2000Assignee: Shell Oil CompanyInventors: Larry Steven Corley, Martin L. Ehrlich
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Patent number: 6084039Abstract: An epoxy resin which is useful as adhesives, resins for coatings, encapsulants, resins for a lamination board, casting materials, molding compounds, and electric insulators, and which can provide a cured resin having excellent heat resistance and moisture resistance is provided which comprises (A) an epoxy resin containing a trisepoxy compound represented by general formula (I), and (B) a curing agent for an epoxy resin, ##STR1## wherein R.sub.1 is a methyl group, n is an integer of 0 to 2, and Ar is a group selected from general formula (II) ##STR2## wherein R.sub.2 and R.sub.3 are an alkyl group having a carbon number of 1 to 6, an alkoxy group having a carbon number of 1 to 6, or a halogen atom, and m and p are an integer of 0 to 2.Type: GrantFiled: March 3, 1998Date of Patent: July 4, 2000Assignee: Shell Oil CompanyInventors: Mareki Miura, Yoshinobu Ohnuma
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Patent number: 6069203Abstract: Coating compositions comprising a binder (60-90 wt. %) and an organic carrier liquid (10-40 wt. %). The binder comprises (wt. % of binder):(a) hydroxy functional oligoether (5-50);(b) hydroxy functional (meth)acrylic copolymer (40-60), including cycloaliphatic (meth)acrylate comonomer and/or an alkyl substituted aromatic vinyl comonomer (at most 10)(c)polyisocyanate crosslinkers (5-40); and(d) a curing catalyst.Type: GrantFiled: September 23, 1998Date of Patent: May 30, 2000Assignee: Shell Oil CompanyInventors: Nathalie Henry, Achim Krebs, Marc Carlo Moerman, Griet Uyterrhoeven
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Patent number: 6063876Abstract: An epoxy resin composition which can be crushed at an ordinary temperature and which comprises respective components described below,(a) 10 to 80 parts by weight of a 4,4'-biphenol type epoxy resin which is crystalline at an ordinary temperature,(b) 20 to 90 parts by weight of a noncrystalline epoxy resin having a softening point of 35.degree. C. to 55.degree. C.Type: GrantFiled: May 27, 1998Date of Patent: May 16, 2000Assignee: Shell Oil CompanyInventors: Atsuhito Hayakawa, Yasuyuki Murata, Norio Tohriiwa
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Patent number: 6037425Abstract: The present invention provides an epoxy resin composition useful for casting applications, comprising a reaction product obtained by reacting (A) a bisphenol epoxy resin, and (B) bisphenol compounds, and if necessary, (C) monofunctional phenols or carboxylic acid compounds, in the presence of sodium compounds, wherein the epoxy resin composition has(a) an epoxy equivalent: 250 to 500 g/equivalent,(b) a sodium content: 20 to 200 ppm, and(c) a haze of its 40 wt % methyl ethyl ketone solution measured according to ASTM D 1003: 15% or less.Type: GrantFiled: November 21, 1996Date of Patent: March 14, 2000Assignee: Shell Oil CompanyInventors: Takao Fukuzawa, Tetsuro Imura, Masayuki Ohta
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Patent number: 6013757Abstract: A substrate is coated or impregnated with a composition comprising an a) epoxy resin, b) a liquid amine-terminated polyamide curing agent prepared by condensing an aminoalkylpiperazine and a long-chain dicarboxylic acid, ester or chloride, and c) water.Type: GrantFiled: November 25, 1997Date of Patent: January 11, 2000Assignee: Shell Oil CompanyInventors: Larry Steven Corley, Derek Scott Kincaid, Glenda Carole Young
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Patent number: 6005060Abstract: The present invention provides an epoxy resin composition which can provide a cured composite product having a high heat resistance, and an excellent mechanical strength at a high temperature.The present invention provides an epoxy resin composition comprising, as essential components: (a) an epoxy resin; (b) a curing agent for epoxy resins, (c) a silane compound having at least one epoxy group or a group being capable of reacting by addition to an epoxy group in a molecule, and at least two alkoxy groups connected to silicone atom in a molecule, and (d) a catalyst for condensation polymerization of a silane compound, and a cured composite product obtained by curing the composition.Type: GrantFiled: April 21, 1998Date of Patent: December 21, 1999Assignee: Shell Oil CompanyInventors: Yasuyuki Murata, Mitsukazu Ochi, Norio Tohriiwa
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Patent number: 5998508Abstract: An epoxy resin composition containing a) an epoxy resin, b) a liquid amine terminated polyamine curing agent prepared by condensing an aminoalkylpiperazine and a dicarboxylic acid, and (c) water. An aqueous dispersion of the amine terminated polyamine curing agent used in this invention is useful as a curing agent for water borne applications.Type: GrantFiled: November 25, 1997Date of Patent: December 7, 1999Assignee: Shell Oil CompanyInventors: Larry Steven Corley, Derek Scott Kincaid, Glenda Carole Young
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Patent number: 5979470Abstract: A method for on-line cleaning of sulfur deposits collected in the absorber column in a Stretford-type process by washing the sulfur deposits with hot caustic solutions while H.sub.2 S is removed from sour gas in the absorber column.Type: GrantFiled: October 3, 1997Date of Patent: November 9, 1999Assignee: Shell Oil CompanyInventor: Charles Arnold Herich
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Patent number: 5962629Abstract: An epoxy resin composition containing a) an epoxy resin, b) a liquid amine terminated polyamine curing agent prepared by condensing an aminoalkylpiperazine and a dicarboxylic acid, and (c) water. An aqueous dispersion of the amine terminated polyamine curing agent used in this invention is useful as a curing agent for water borne applications.Type: GrantFiled: November 16, 1995Date of Patent: October 5, 1999Assignee: Shell Oil CompanyInventors: Larry Steven Corley, Derek Scott Kincaid, Glenda Carole Young
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Patent number: 5902734Abstract: An isolated mixed bacterial culture, preferably BC-1, ATCC No. 202057, which degrades ethers, especially branched alkylethers including MTBE, under aerobic conditions has been prepared.Type: GrantFiled: December 24, 1997Date of Patent: May 11, 1999Assignee: Shell Oil CompanyInventor: Joseph Patrick Salanitro
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Patent number: 5900466Abstract: Polyolefin-substituted dicarboxylic ester derivatives, having an ester group derived from a polyether polyol and process for making such; wherein the ester derivatives are useful additives in lubricating oil compositions and concentrates thereof.Type: GrantFiled: August 8, 1996Date of Patent: May 4, 1999Assignee: Shell Oil CompanyInventors: Michael Thomas Clark, Indu Sawhney, Hendrik Tijmen Verkouw
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Patent number: 5889121Abstract: The use of a minor amount of poly-1-butene for improving the processability or extrusion efficiency of a metallocene-made thermoplastics, particularly metallocene-made low density polyethylene, by adding about 0.1-15 wt % of poly-1-butene to the metallocene-made thermoplastics which are melt incompatible with the poly-l-butene prior to processing.Type: GrantFiled: October 4, 1996Date of Patent: March 30, 1999Assignee: Shell Oil CompanyInventors: Charles C. Hwo, Mark L. Kasakevich, Jerry W. Secrist
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Patent number: 5847051Abstract: The present invention relates to the addition of a poly-1-butene to a mixture of a styrene-diene block copolymer, a polypropylene homo(co)polymer, oil, and optionally a metallocene-made polyethylene and/or filler such as talc, to make a mixture suitable for making automotive parts, household goods, sporting goods, etc.Type: GrantFiled: August 29, 1996Date of Patent: December 8, 1998Assignee: Shell Oil CompanyInventors: Charles Chiu-Hsiung Hwo, Michael John Modic, Mark Leonid Kasakevich
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Patent number: 5846404Abstract: A selenium-containing aqueous stream may be used as a quenching water stream and optionally a cutting water stream in a delayed coking process to effectuate the removal of selenium from the selenium-containing aqueous stream resulting in the formation of a selenium-coke product. In addition, selenium may be concentrated in selenium-containing stripped sour water streams by recycling the stream in one or more hydroprocessing units and one or more sour water stripper units and subsequently removed by using a portion of the selenium-containing stripped sour water stream as a quenching water stream and optionally a cutting water stream in a delayed coking process.Type: GrantFiled: September 15, 1994Date of Patent: December 8, 1998Assignee: Shell Oil CompanyInventors: Raymond Tom Fong, John Bernard Rodden, Jack Thomas Veal, Charles Lee Meyer, Michael Norris Treybig, Coley Jerald Williams, Richard Joseph Horvath
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Patent number: 5837867Abstract: The present invention is directed to the use of cyclic amide alkoxylate compounds as additives in fuel compositions having a major amount of a mixture of hydrocarbons in the gasoline boiling range and a minor amount of one or more cyclic amide alkoxylate compounds of the formula: ##STR1## wherein x is from 2 to 20 and y is from 1 to 50. R.sub.1 and R.sub.2 are independently hydrogen or hydrocarbyl of 1 to 100 carbon atoms. R.sub.3 is hydrocarbyl of 1 to 100 carbon atoms and R.sub.4 is independently hydrocarbyl of 2 to 100 carbon atoms. R.sub.5 is hydrogen, hydrocarbyl of 1 to 100 carbon atoms or acyl of 1 to 20 carbon atoms.The invention is also directed to the use of these cyclic amide alkoxylate compounds for decreasing intake valve deposits, controlling octane requirement increases and reducing octane requirement. The invention is further directed to novel cyclic amide alkoxylate compounds.Type: GrantFiled: August 6, 1996Date of Patent: November 17, 1998Assignee: Shell Oil CompanyInventors: Jiang-Jen Lin, Charles Lee Edwards, Pen-Chung Wang, Garo Garbis Vaporciyan
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Patent number: 5834655Abstract: A method for testing petroleum hydrocarbon contamination in which method a sample is mixed with an alkyl halide extraction solvent. Subsequently the solvent extraction phase is separated, and a Friedel-Crafts Lewis acid catalyst is added thereby obtaining a colored reaction product in the solvent extraction phase, the color of which being indicative of the petroleum hydrocarbon contamination.Type: GrantFiled: April 24, 1995Date of Patent: November 10, 1998Assignee: Shell oil CompanyInventors: Devji Dalubhai Lad, Gordon Lethbridge, Paul Eric Linnett