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| Number | Title | Issue Date |
| 7767840 | Organometallic compounds Organometallic compounds suitable for use as vapor phase deposition precursors for Group IV metal-containing films are provided. Methods of depositing Group IV metal-containing films using certain organometallic precursors are also provided. Such Group IV metal-cont... | 08/03/2010 |
| 7425281 | Liquid crystal compositions comprising an organogermanium compound and methods for using the same The present invention provides organogermanium compounds and liquid crystal compositions comprising such a compound. ... | 09/16/2008 |
| 7405262 | Preparation of functionalized anionic polymerization initiators A process for preparing a functionalized polymerization initiator, the process comprising combining a functionalized styryl compound and an organolithium compound. ... | 07/29/2008 |
| 7321048 | Organometallic compound purification A method of purifying an organometallic compound by heating the organometallic compound in the presence of a trialkyl aluminum compound and a catalyst. ... | 01/22/2008 |
| 7285608 | Metallocene ligands, metallocene compounds and metallocene catalysts, their synthesis and their use for the polymerization of olefins A catalyst system includes a metallocene compound having the formula R9 L1 L2 M1 R1 R2 wherein R9 is a bridge between ligands L1 and L2 and M1 is a metal of... | 10/23/2007 |
| 7244522 | Lubricant for magnetic recording medium and use thereof A magnetic recording medium and method for forming the magnetic recording medium are described. The magnetic recording medium includes a magnetic layer formed on a non-magnetic support, and a lubricant layer over the magnetic layer. The lubricant layer includes a co... | 07/17/2007 |
| 7238818 | Heterocyclic metallocenes and polymerization catalysts A new class of heterocyclic metallocenes, a catalytic system containing them and a process for polymerizing addition polymerizable monomers using said catalytic system are disclosed; the heterocyclic metallocenes correspond to the formula (I): YjR″... | 07/03/2007 |
| RE39532 | Metallocenes containing ligands of 2-substituted indenyl derivatives, process for their preparation, and their use as catalysts The novel metallocenes of the formula I in which, preferably, M1 is Zr or Hf, R1 and R2 are alkyl or halogen, R3 and R4 are hydrogen, R5 and R6 are alky... | 03/27/2007 |
| 7098346 | Methods and compounds for making coatings, waveguides and other optical devices A compound of the general formula: R1R2R4MR5, wherein R1, R2 and R4 are independently an aryl, alkyl, alkenyl or alkynyl group, wherein at least one of R1, R2 and R | 08/29/2006 |
| 7081543 | Bridged biscyclopentadienyl ligands and method of preparation The present invention relates to ligands and the synthesis of those ligands for use in metallocene complexes. More particularly, the present invention relates to the synthesis of diarylsilyl bridged biscyclopentadienes using diarylsilyldisulfonates. Even more partic... | 07/25/2006 |
| 7049264 | Supported catalyst for olefin polymerization A supported catalyst for olefin polymerization comprises A) as support material, a copolymer comprising the monomer units I, II and III, where the monomer units I have the formula (I) and the monomer un... | 05/23/2006 |
| 7002031 | Preparation of silicon-bridged metallocene compounds A process for obtaining silicon-bridged metallocene compounds comprising the following steps: a) reacting, at a temperature of between −10° C. and 70° C., the starting ligand with about 2 molar equivalents of an alkylating agen... | 02/21/2006 |
| 6982306 | Stannoxy-substituted metallocene catalysts for olefin and acetylene polymerization This invention relates to the field of olefin polymerization catalyst compositions, and methods for the polymerization and copolymerization of olefins, including polymerization methods using a catalyst composition. One aspect of this invention is the formation and u... | 01/03/2006 |
| 6960676 | Method of preparing group 14 bridged biscyclopentadienyl ligands The present invention relates to ligands and the synthesis of those ligands for use in metallocene complexes. More particularly, the present invention relates to the synthesis of diarylsilyl bridged biscyclopentadienes using diarylsilyldisulfonates. Even more partic... | 11/01/2005 |
| 6924375 | Facile synthesis of 1,9-diacyldipyrromethanes The present invention provides a method of making a metal complex. The method comprises the steps of: (a) acylating a dipyrromethane or a 1-monoacyldipyrromethane to form a mixed reaction product comprising a 1,9-diacyidipyrromethane; (b) combining the reaction prod... | 08/02/2005 |
| 6861544 | Fluorous tin compounds an methods of using fluorous tin compounds A method of carrying out a reaction comprising the steps of: mixing at least one organic reaction component with at least one fluorous reaction component having the formula: X1Sn(R)n[Rs(Rf)]3-n, X1X2Sn... | 03/01/2005 |
| 6849668 | Organo-silicon compounds and their use as photoinitiators A multi-functional photoinitiator of formula (I) R1m—Q—(A1—PI)n (I) wherein Q is a heteroatom selected from Si, Ti, Zr and Sn or any two independently selected suc... | 02/01/2005 |
| 6841638 | Ionic compounds with delocalized anionic charge, and their use as ion conducting components or as catalysts The invention relates to an ionic compound corresponding to the formula [R1X1(Z1)—Q−—X2(Z2)—R2]m Mm+ in which Mm+ is a cation of valency m, each of ... | 01/11/2005 |
| 6787661 | Tin-containing organolithium compounds and preparation thereof The present invention relates to a tin-containing organolithium compound which can be used as anionic polymerization initiators, represented by the following formula (1): R4−xSn(Ya—Zm—Yb—Li)x | 09/07/2004 |
| 6635779 | Metallocene compounds, process for their preparation and their use in catalytic systems for the polymerization of olefins A class of metallocene compounds is disclosed having general formula (I) wherein Y is a moiety of formula (II) wherein A, B, and D, same or different from each other, are selected from an element of the groups 14 to 16 of the Periodic Table of the Element... | 10/21/2003 |
| 6570031 | Dendrimer compounds, method for the production thereof, use thereof as catalysts The present invention relates to a novel dendrimic compounds, to a method for the production thereof and to the use thereof as catalysts for the production of polymers, in particular to the use thereof as co-catalysts for metallocenes for polymerizing uns... | 05/27/2003 |
| 6517795 | Process for producing hydrotalcites and the metal oxides thereof A process for producing high-purity hydrotalcites by reacting alcohols or alcohol mixtures with at least one or more divalent metal(s) and at least one or more trivalent metal(s) and hydrolyzing the resultant alcoholate mixture with water. The correspondi... | 02/11/2003 |
| 6506918 | Heterogeneous organotin catalysts This invention provides: (a) new organotin functionalized silanes: (b) a solid prepared by chemically bonding organotin functionalized silanes to a solid inorganic support containing surface hydroxy groups: (c) a solid catalyst prepared from said supporte... | 01/14/2003 |
| 6451904 | Preparing sterile articles from polymers containing a stabilizer based on a poly (oxyalkylene) Novel polymer stabilizers are disclosed. The novel stabilizers have the general formula (R)q Sn-(MR"-OCH2 -R'CH]m -OT)4-q, P-[(OCH2 -R'CH)m OT]3' ##STR1## wherein M is O or S and... | 09/17/2002 |
| 6444833 | Metallocene compounds, process for their preparation and their use in catalytic systems for the polymerization of olefins A class of metallocene compounds is disclosed having the general formula (I): ##STR1## wherein Y is a moiety of formula (II) ##STR2## wherein A, B and D, same or different from each other, are selected from an element of the groups 14 to 16 of the Pe... | 09/03/2002 |
| 6388118 | Process for the preparation of cyclopentadienyl compounds and compounds obtained therefrom A process is disclosed for preparing bis-cyclopentadienyl compounds bridged by a single carbon atom by reacting a carbonyl compound with a cyclopentadienyl compound in the presence of a base and of an oxygen-containing solvent having an atomic ratio carbo... | 05/14/2002 |
| 6372930 | Polymeric ligands, polymeric metallocenes, catalyst systems, preparation, and use Polymeric ligands, polymeric metallocenes, and processes for preparing same are provided. The process for preparing polymeric metallocenes comprises reacting a polymeric ligand, a transition metal compound, and an alkali metal compound. In one embodiment,... | 04/16/2002 |
| 6365764 | Bridged bis-fluorenyl metallocenes process for the preparation thereof and use thereof in catalysts for the polymerization of olefins Metallocene compounds having two fluorenyl ligands bridged with a single silicon or germanium atom, said atom having two substituent groups containing a total of at least four carbon atoms, are useful as catalyst components for the polymerization of olefi... | 04/02/2002 |
| 6359159 | MOCVD precursors based on organometalloid ligands Chemical vapor deposition processes utilize as precursors volatile metal complexes with ligands containing metalloid elements silicon, germanium, tin or lead.... | 03/19/2002 |
| 6344529 | Zwitterionic catalyst activator Disclosed are compounds useful as catalyst activators for olefin polymerization, comprising structures of the following formulae: ##STR1## wherein: L+ is a protonated derivative of an element of Group 15 of the Periodic Table of the Elements, a... | 02/05/2002 |
| 6340768 | MOCVD precursors based on organometalloid ligands Volatile metal complexes with -sila-ଲ-diketonate ligands containing haloalkyl, and particularly, perfluoroalkyl, substitutents are useful as metal precursors for chemical vapor deposition processes and as nanostructured materials containing f... | 01/22/2002 |
| 6329082 | Hetero-spiro compounds and their use as electroluminescence materials Hetero-spiro compounds of the formula (I), ##STR1## where .PSI. is an element of the 4th main group of the Periodic Table with the exception of carbon, preferably Sn, Ge or Si, particularly preferably Ge or Si, and K1 and K2 are, ind... | 12/11/2001 |
| 6307079 | Hydrocarbon soluble, tin functionalized alkali metals Tin lithium compounds of the formula RR'R"SnGM', wherein R, R' and R" may be the same or different and each comprises an alkyl, aryl, aralkyl or alkylaryl having from 1 to 15 carbon atoms and wherein each carbon atom may be unsubstituted or substituted, G... | 10/23/2001 |
| 6291389 | Cationic polymerization catalysts A cationic catalyst composition comprising a reactive cation and a compatible non-coordinating anion is preferably used at a temperature of 20° C. or less to produce olefin polymers, particularly polymers and copolymers of isobutylene.... | 09/18/2001 |
| 6262197 | Multinuclear metallocene compound, a process for its preparation and its use as catalyst The present invention relates to a metallocene compound containing at least two metallocene fragments L--MX2 --L which are different from one another and having the formula I ##STR1## where B is a bridging unit, m is an integer from 2 to 100,00... | 07/17/2001 |
| 6255506 | Metallocenes containing aryl-substituted indenyl derivatives as ligands, process for their preparation, and their use as catalysts A very effective catalyst system for the polymerization or copolymerization of olefins comprises a cocatalyst, preferably an aluminoxane or a supported aluminoxane, and a metallocene of the formula I ##STR1## in which, in the preferred form, M1... | 07/03/2001 |
| 6255515 | Processes for producing silicon- or germanium-containing organic compound, transition metal complex, catalyst for polymerization of -olefin and -olefin polymer An alkali metal- or alkali earth metal-containing organic compound (i) is reacted with a leaving group- and silicon- or germanium-containing compound (ii) in the presence of a nitrogen-containing aromatic heterocyclic compound. By such a method, it is pos... | 07/03/2001 |
| 6235918 | Supported organometallic catalysts for hydrogenation and Olefin Polymerization Novel heterogeneous catalysts for the which hydrogenation of olefins and arenes with high conversion rates under ambient conditions and the polymerization of olefins have been developed. The catalysts are synthesized from Ziegler-type precatalysts by supp... | 05/22/2001 |
| 6197990 | Process for the preparation of cyclopentadienyl metal salt and process for the preparation of derivative of cyclopentadiene using the same A cyclopentadienyl metal salt is prepared by reacting a cyclopentadiene and a metal hydride in the presence of an amine compound. Furthermore, a derivative of a cyclopentadiene in which a phenyl group is bonded to its cyclopentadienyl moiety through an el... | 03/06/2001 |
| 6169193 | Polysiloles and polygermoles Disclosed herein are polysilole and polygermole compounds. The silicon or germanium ring atom is directly linked in the polymer to another silicon or germanium ring atom from another polymer unit. The result is compounds that fluoresce and have electrolum... | 01/02/2001 |
