Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7332618 | Organometallic precursor compounds This invention relates to organometallic precursor compounds represented by the formula (H)mM(R)n wherein M is a metal or metalloid, R is the same or different and is a substituted or unsubstituted, saturated or unsaturated, heterocyclic radica... | 02/19/2008 |
| 7291575 | Active, heterogeneous bi- or tri-dentate catalyst A catalyst composition, and olefin polymerization process using same, formed from a mixture of a non-aluminoxane aluminum compound, an inorganic oxide and a transition metal bidentate or tridentate complex in certain prescribed proportions. The composition can be fo... | 11/06/2007 |
| 7279603 | Boron and aluminum compounds in electronic components The present invention relates to the use of boron and aluminum compounds in electronics, in particular as electron transport material, as host material of the emission layer and as hole blocking material, in each case in phosphorescent OLEDs, and also to layers prod... | 10/09/2007 |
| 7238757 | Oxygen-containing organoaluminium complexes as cocatalysts Disclosed are compounds of formula (I) which compounds are useful as cocatalysts in olefinic polymerisation reactions, e.g., as Ziegler-Natta catalysts. ... | 07/03/2007 |
| 7238336 | Method for the production of α-alane A method of forming α-alane. The method includes reacting aluminum trichloride and an alkali metal hydride to form an alane-ether complex solution. An aqueous diethyl ether solution is optionally added to the alane-ether complex solution to form a partially hydroly... | 07/03/2007 |
| 7211235 | Method for producing hydrotalcites A method is described for the manufacture of hydrotalcites by using at least one compound of a bivalent metal (Component A) and at least one compound of a trivalent metal (Component B), wherein at least one of these components is not used in the form of a solution, ... | 05/01/2007 |
| 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 |
| 7166734 | Method for making organometallic compounds Organometallic compounds of Group IIB and IIIA metals that are substantially pure and contain low levels of oxygenated impurities are provided. Also provided are methods of preparing such organometallic compounds. ... | 01/23/2007 |
| 7141527 | Catalyst system and process for the polymerization of olefins A catalyst system for the polymerization of olefins comprising the product obtained by contacting: (A) a metallocene complex; (B) an organometallic aluminium compound of formula (II): Al[CH2—C(Ar)R4R5 | 11/28/2006 |
| 7125631 | Lithium salt, ionic conductor and liquid electrolyte Disclosed are a lithium salt expressed by a formula, LiAlXn(OY)4-n, where “X” is an electrophilic substituent group and “Y” is an oligoether group, an ionic conductor with the lithium salt dispersed in a structural member, and a liquid ... | 10/24/2006 |
| 7112691 | Purification method for organometallic compounds and organometallic compounds obtained therefrom A method of purifying an organometallic compound comprising distilling the organometallic compound for purification while blowing an inert gas through a vapor of the organopolysiloxane, thereby removing from the organometallic compound an impurity havin... | 09/26/2006 |
| 6984746 | Method for the production of α-alane A method of forming α-alane. The method includes reacting aluminum trichloride and an alkali metal hydride to form an alane-ether complex solution. An aqueous ether solution is optionally added to the alane-ether complex solution to form a partially hydrolyzed ethe... | 01/10/2006 |
| 6958306 | Activated catalyst systems from substituted dialuminoxane complexes A catalyst composition and method for preparing a supported catalyst system for olefin polymerization is provided. In one aspect, the catalyst composition includes a reaction product of a dialuminoxane and a halogen substituted aryl borane, wherein the reaction take... | 10/25/2005 |
| 6919291 | Fluorinated zwitterionic cocatalyst activators for olefin polymerization Zwitterionic compositions of matter comprising cations [Ct]+ and anions connected together with substantially rigid fluorinated linking groups are described. These zwitterionic compositions serve as cocatalysts. They activate olefin polymerization catalys... | 07/19/2005 |
| 6911551 | Spiro compounds based on boron or aluminum and the use of the same in the electronics industry The present invention relates to substituted boron or aluminum spiro compounds and their use in the electronic industry. The compounds of the invention are used as electron transport material, hole blocking material and/or as host material in organic electroluminesc... | 06/28/2005 |
| 6884748 | Process for producing fluorinated catalysts The present invention relates to a process of producing a fluorided catalyst compound, catalyst compositions, and polymerization methods including such. At least one specific embodiment of the invention includes contacting a chlorinated metallocene catalyst componen... | 04/26/2005 |
| 6864205 | Heterocyclic-amide catalyst compositions for the polymerization of olefins A family of novel hetrocyclic-amide type catalyst precursors useful for the polymerization of olefins, such as ethylene, higher alpha-olefins, dienes, and mixtures thereof. ... | 03/08/2005 |
| 6831032 | Ziegler-Natta catalyst and methods of making and using same A method for making a solid catalyst component for use in a Ziegler-Natta catalyst includes combining a porous particulate support with a magnesium source in a hydrocarbon solvent to form a mixture, the magnesium source including a hydrocarbon soluble organomagnesiu... | 12/14/2004 |
| 6713642 | Method for producing alkali metal monohydridoborates and monohydridoaluminates The invention relates to a method for producing compounds of general formula (A) by reacting an alkali metal hydride with a compound (B) during which the reaction is carried out in the presence of a catalyst that contains boron, whereby: M represents Li, Na, K, Rb o... | 03/30/2004 |
| 6706249 | Composite polybasic salt, process for producing the same, and use A composite metal polybasic salt containing a trivalent metal and magnesium as metal components and having a novel crystal structure, and a method of preparing the same. The invention further deals with a composite metal polybasic salt which has anion-exchanging pro... | 03/16/2004 |
| 6627765 | Volatile organometallic complexes suitable for use in chemical vapor depositions on metal oxide films Novel ligated compounds of tin, titanium, and zinc are useful as metal oxide CVD precursor compounds without the detriments of extreme reactivity yet maintaining the ability to produce high quality metal oxide coating by contact with heated substrates.... | 09/30/2003 |
| 6583206 | Saturated [2.2.2] dicarboxylate salt thermoplastic nucleators and thermoplastic compositions thereof Compounds of and compositions comprising specific salts of saturated [2.2.2] dicarboxylate in order to provide highly desirable properties within thermoplastic (e.g., polyolefin) articles are provided. The inventive salts and derivatives thereof are usefu... | 06/24/2003 |
| 6432531 | Synthesis of alumina acetate monohydrate salt sol fibers and uses thereof A cationic fibrous acetate salt of boehmite alumina produced by providing a slurry of water and basic aluminum acetate, stirring the slurry to ensure substantially complete mixing thereof, reacting the slurry in a vessel for a time, temperature, and stirr... | 08/13/2002 |
| 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 |
| 6291614 | Dinuclear fluoroaryl aluminum alkyl complexes A catalyst activator particularly adapted for use in the activation of metal complexes of metals of Group 3-10 for polymerization of ethylenically unsaturated polymerizable monomers, especially olefins, comprising: a compound corresponding to the formula:... | 09/18/2001 |
| 6255531 | Boron compounds and other compounds of group IIIa The present invention relates to a chemical compound of the formula I ##STR1## where R are, independently of one another, identical or different and are each a halogen atom or a C1 -C40 -group, X are, independently of one another, identic... | 07/03/2001 |
| 6248914 | Metalloid salt catalyst/activators A compound useful as a catalyst or as a cocatalyst in combination with a Group 3-10 metal for addition polymerizations corresponding to the formula: [M'Q12 L'I']+ (Arf3 MQ2)-- wherein... | 06/19/2001 |
| 6239061 | Aluminum-phosphinimine complexes as catalysts for the (co)polymerization of ethylene Aluminum-phosphinimine complexes function as a component in a catalyst system for the (co)polymerization of ethylene. The inventive catalyst components form a highly productive polymerization system when activated with so-called "ionic activators". The ne... | 05/29/2001 |
| 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 |
| 6150487 | Multifunctional organic alkali metal initiator and its synthesis, anionic polymerized star polymers and their preparation This invention relates to a multifunctional organic alkali metal initiator for the preparation of various kinds of star polymers by anionic polymerization, a process for making the initiator, a process using said initiator for making star polymers and the... | 11/21/2000 |
| 6147174 | Aluminum based lewis acid cocatalysts for olefin polymerization This invention is directed to a process for the preparation of polyolefins from one or more olefinic monomers comprising combining said olefins under olefin polymerization conditions with an organometallic catalyst compound that is activated for olefin po... | 11/14/2000 |
| 6146608 | Stable hydride source compositions for manufacture of semiconductor devices and structures A metal hydride derivative wherein at least one hydrogen atom is replaced by deuterium (21 H) or tritium (31 H) isotope. The metal constituent of such metal hydride may be a Group III, IV or V metal or a transit... | 11/14/2000 |
| 6136224 | Gas generant A gas generant for an air, which is improved in the defects of gas generants using sodium azide in a practical use and has stable combustion capability. And a molecular compound comprising (a) a gas generant component, (b) an oxidant component and (c) a r... | 10/24/2000 |
| 6051741 | Preparation of γ,δ-unsaturated ketones by the Carroll reaction, novel catalysts therefor and the preparation thereof A process for preparing γ,δ-unsaturated ketones of the general formula I ##STR1## by reacting an allyl alcohol of the general formula II ##STR2## in which R1 is H or a hydrocarbon radical having 1 to 20 carbon atoms, with diket... | 04/18/2000 |
| 6002037 | Chiral organoalanes and their organic derivatives via zirconium-catalyzed asymmetric carboalumination of terminal alkenes The present invention describes the Zr-catalyzed asymmetric carboalumination of alkenes to produce chiral alkylalanes that can be converted to various chiral organic compounds, such as isoalkyl alcohols, in highly enantiomeric excess. More particularly, t... | 12/14/1999 |
| 5932363 | Electroluminescent devices A luminescent composition containing a mixture of a fluorescent material and a metal chelate compound of the formula Ln --M+n (I) wherein M represents a metal; n is a number of from 1 to 3, and L is a ... | 08/03/1999 |
| 5886203 | Metalorganic compounds A process is provided for the production of metalorganic compounds by reacting a Grignard reagent with a Group II, Group III or Group V metal halide in a tertiary alkyl amine solvent to form a metalorganic adduct, isolating the adduct and dissociating the... | 03/23/1999 |
| 5885924 | Halogenated supports and supported activators The present invention relates to catalyst supports and improvements thereof for use with supported activators and supported transition metal catalyst systems. The invention specifically involves reacting a carrier containing reactive functionalities, e.g.... | 03/23/1999 |
| 5847174 | Method for the preparation of a polyhalogeno metal complex compound Proposed is a method for the preparation of an ionic polyhalogeno metal complex compound consisting of a tetraalkylammonium cation and a polyhalogeno metal anion, of which the metal is selected from those having an atomic valency of 1 and a coordination n... | 12/08/1998 |
| 5783717 | Method for purifying organometal compound A method for purifying an organometal compound by removing oxygen atom-containing compounds included in the organometal compound as impurities is herein disclosed. The method comprises the steps of mixing an organometal compound represented by the followi... | 07/21/1998 |
