Patents by Inventor Albert Santo Stella
Albert Santo Stella 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: 7928154Abstract: A method for preparing a polymer-organoclay composite composition comprises combining a solvent and an unexfoliated organoclay to provide a first mixture, wherein the unexfoliated organoclay comprises alternating inorganic silicate layers and organic layers, and has an initial spacing between the silicate layers; exposing the first mixture to an energized condition of a sufficient intensity and duration to increase the initial spacing of the inorganic silicate layers, to provide a second mixture; contacting the second mixture with a polymer composition so that the polymer composition fills at least one region located between at least one pair of silicate layers, wherein the polymer composition is at least partially soluble in the solvent; and removing at least a portion of the solvent from the second mixture, wherein the inorganic silicate layers remain separated by the polymer after removal of the solvent.Type: GrantFiled: June 21, 2007Date of Patent: April 19, 2011Assignee: Sabic Innovative Plastics IP B.V.Inventors: Kwok Pong Chan, Sarah Elizabeth Genovese, Erik C. Hagberg, David Bruce Hall, John Lester Maxam, Tara J. Mullen, Roy Ray Odle, Albert Santo Stella, James Mitchell White
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Publication number: 20110021824Abstract: This invention relates generally to non-ionic X-ray contrast agents. It further relates to a method of using solid adsorbents to reduce backpeaks content in the purification of iodixanol. In particular, it relates to the use of non-polar organic adsorbents with the average pore diameter smaller than about 30 nm. Specific examples of adsorbents of the instant invention include non-polar acrylic ester, di-vinyl benzene resins, poly-styrene di-vinyl benzene resins, and carbon adsorbents. In certain embodiments, upwards of 30% of the backpeak levels and 60% N-acetyl cyclic iodixanol levels are reduced for a 5% loss of iodixanol.Type: ApplicationFiled: October 20, 2009Publication date: January 27, 2011Applicant: GE HEALTHCARE ASInventors: LARS TERJE HOLMAAS, OLE MAGNE HOMESTAD, DIDRIK MALTHE-SORENSSEN, ERIC PRESSMAN, ALBERT SANTO STELLA
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Patent number: 7863463Abstract: Disclosed herein is a method for purification of dianhydrides comprising a substantial amount (10000 ppm or more) of at least one metal salt. In one aspect the method is useful for the purification of dianhydrides prepared by the reaction of a halophthalic anhydride with a metal carbonate and may be optionally catalyzed by a phase transfer catalyst. The purification of the dianhydrides may be accomplished by hydrolyzing the dianhydride metal salt mixture directly to a tetraacid with an inorganic acid, followed by separating the impurities from an aqueous phase, and subsequently heating the tetraacid to effect ring closure to form a purified dianhydride having less than 50 parts per million metal halide and lower levels of other residual impurities. In one aspect the method is highly effective in removing phase transfer catalyst impurities such as hexalkylguanidinium halides initially present in the dianhydride undergoing purification.Type: GrantFiled: November 22, 2005Date of Patent: January 4, 2011Assignee: Sabic Innovative Plastics IP B.V.Inventors: Eric James Pressman, Albert Santo Stella, Beatriz Peñalver Bernabe, Lioba Maria Kloppenburg, Lee Harris Bergman
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Publication number: 20100160578Abstract: The present invention provides a process for measuring and controlling chemical reactions that produce thermoplastic polymers by utilizing a stoichiometry correction during a reaction cycle to produce thermoplastic resins with desired properties. The thermoplastic polymer is made from at least one first monomer having a first reactive end group and at least one second monomer having a second reactive end group by reaction of the first reactive end group with the second reactive end group and has a glass transition temperature of greater than 130° C.Type: ApplicationFiled: December 19, 2008Publication date: June 24, 2010Applicant: SABIC INNOVATIVE PLASTICS IP B.V.Inventors: Roy Ray Odle, Vijay Gopalakrishnan, Narayan Ramesh, Albert Santo Stella, Lioba Maria Kloppenburg, David Bruce Hall
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Publication number: 20090114569Abstract: An embodiment of the invention is directed to a treatment method for reducing the level of metallic and nonmetallic impurities in an oil. The method includes the step of contacting the oil with a porous silica adsorbent material. The adsorbent material is characterized by a Brunauer-Emmett-Teller (BET) surface area value (total) of at least about 15 m2/g; and a Barrett-Joyner-Halenda (BJH) pore volume (total) of at least about 0.5 cc/g.Type: ApplicationFiled: November 2, 2007Publication date: May 7, 2009Applicant: GENERAL ELECTRIC COMPANYInventors: John Aibangbee Osaheni, Thomas Joseph Fyvie, Albert Santo Stella
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Publication number: 20080319210Abstract: A method for purifying dianhydrides is provided. In one aspect, purified oxybisphthalic anhydrides, intermediates useful in the preparation of polyetherimides are provided. In one embodiment, a first solution containing a dianhydride compound, a solvent, and a phase transfer catalyst is contacted with a solid inorganic adsorbent material having a total pore volume of about 0.5 milliliters/gram or greater and a cumulative pore volume distribution of about 20 percent or greater of particles having a pore diameter in a range between about 3 nanometers and about 20 nanometers. The solution containing the dianhydride compound is then separated from the solid inorganic adsorbent material to provide a purified dianhydride compound which is substantially free of the phase transfer catalyst. The purification technique is especially valuable for preparing high purity oxybisphthalic anhydrides, such as 4,4?-oxybisphthalic anhydride (4,4?-ODPA), which are substantially free of residual phase transfer catalyst.Type: ApplicationFiled: September 2, 2008Publication date: December 25, 2008Inventors: Albert Santo Stella, David Bruce Hall
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Patent number: 7446214Abstract: A method for purifying dianhydrides is provided. In one aspect, purified oxybisphthalic anhydrides, intermediates useful in the preparation of polyetherimides are provided. In one embodiment, a first solution containing a dianhydride compound, a solvent, and a phase transfer catalyst is contacted with a solid inorganic adsorbent material having a total pore volume of about 0.5 milliliters/gram or greater and a cumulative pore volume distribution of about 20 percent or greater of particles having a pore diameter in a range between about 3 nanometers and about 20 nanometers. The solution containing the dianhydride compound is then separated from the solid inorganic adsorbent material to provide a purified dianhydride compound which is substantially free of the phase transfer catalyst. The purification technique is especially valuable for preparing high purity oxybisphthalic anhydrides, such as 4,4?-oxybisphthalic anhydride (4,4?-ODPA), which are substantially free of residual phase transfer catalyst.Type: GrantFiled: November 22, 2006Date of Patent: November 4, 2008Assignee: SABIC Innovative Plastics IP B.V.Inventors: Albert Santo Stella, David Bruce Hall
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Patent number: 7411032Abstract: A method for making polyetherimides is provided by reacting a high purity dianhydride with an aromatic diamine under condensation polymerization conditions. The dianhydrides employed are purified by a method comprising contacting a first solution containing a dianhydride compound, a solvent, and a phase transfer catalyst, with a solid inorganic adsorbent material having a total pore volume of about 0.5 milliliters/gram or greater and a cumulative pore volume distribution of about 20 percent or greater of particles having a pore diameter in a range between about 3 nanometers and about 20 nanometers. The solution containing the dianhydride compound is then separated from the solid inorganic adsorbent material to provide a purified dianhydride compound which is substantially free of the phase transfer catalyst. The purified dianhydrides are then condensed with aromatic diamines to provide polyetherimide compositions which are substantially free of residual phase transfer catalyst.Type: GrantFiled: November 21, 2006Date of Patent: August 12, 2008Assignee: SABIC Innovative Plastics IP B.V.Inventors: Albert Santo Stella, David Bruce Hall
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Patent number: 7408070Abstract: A method for purifying bisimides is provided. In one aspect, purified oxybisphthalimides, intermediates useful in the preparation of polyetherimides are provided. In one embodiment, a first solution containing a bisimide compound, a solvent, and a phase transfer catalyst is contacted with a solid inorganic adsorbent material having a total pore volume of about 0.5 milliliters/gram or greater and a cumulative pore volume distribution of about 20 percent or greater of particles having a pore diameter in a range between about 3 nanometers and about 20 nanometers. The solution containing the bisimide compound is then separated from the solid inorganic adsorbent material to provide a purified bisimide compound which is substantially free of the phase transfer catalyst. The purification technique is especially valuable for preparing high purity oxybisphthalimides, such as 4,4?-oxybis(N-methylphthalimide), which are substantially free of residual phase transfer catalyst.Type: GrantFiled: November 22, 2006Date of Patent: August 5, 2008Assignee: SABIC Innovative Plastics IP B.V.Inventors: Albert Santo Stella, David Bruce Hall
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Publication number: 20080119660Abstract: The present invention provides a method for preparing relatively insoluble bisimides under conditions which afford high imidization reaction rates and which permit the monitoring and adjustment of reactant stoichiometry at any stage of the reaction. The bisimides provided by the present invention are prepared either by reaction of a diamine such as 4,4?-diaminodiphenylsulfone (DDS) with an anhydride, for example 3-chlorophthalic anhydride (3-ClPA) in the presence of a solvent at a pressure greater than one atmosphere and at a temperature above the normal boiling point of the solvent, or by reaction of a monoamine with a dianhydride under the same conditions. In one embodiment, the relatively insoluble product bisimides provided by the present invention have a solubility in ortho-dichlorobenzene of less than about 10 percent by weight at a temperature of about 180° C.Type: ApplicationFiled: November 16, 2006Publication date: May 22, 2008Applicant: General Electric CompanyInventors: Farid Fouad Khouri, Albert Santo Stella