Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8124698 | Diene polymerisation Process for producing homopolymers or copolymers of conjugated dienes by contacting monomeric material having at least one conjugated diene with a catalyst system including two or more different transition metal compounds and optionally one or more activators. Prefe... | 02/28/2012 |
| 8003740 | Method of controlling the relative activity of the different active centers of hybrid catalysts Method of preparing olefin polymers, which comprises the polymerization of at least one α-olefin in the presence of a hybrid catalyst to produce a polymer comprising at least a higher molecular weight polymer component and a lower molecular weight polymer component... | 08/23/2011 |
| 7825200 | Controlled free radical grafting from polyolefins Described are novel monomers bearing functionalities capable of initiating control free radical reactions, and a novel process using these initiating monomers in the co-polymerization of an olefin for the formation of well-controlled polyethylene graft polymers wher... | 11/02/2010 |
| 7754832 | Block copolyolefins possessing a tapered structure A method of preparing a polymer having a tapered block copolymer structure. The method comprises polymerizing a first olefin monomer and a different second olefin monomer in the presence of a catalyst supporting living or quasi-living polymerization. In certain embo... | 07/13/2010 |
| 7410926 | Polymerization process using a supported, treated catalyst system The present invention relates to a supported, treated catalyst system and its use in a process for polymerizing olefin(s). More particularly, it provides a supported, treated catalyst system produced by a process comprising the steps of: (a) forming a supported bime... | 08/12/2008 |
| 7354979 | Polymer production at supercritical conditions This invention relates to a process to polymerize olefins comprising contacting, in a polymerization system, olefins having three or more carbon atoms with a catalyst compound, activator, optionally comonomer, and optionally diluent or solvent, at a temperature abov... | 04/08/2008 |
| 7332554 | Polymers with new sequence distributions The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel polymers with new sequence distributions. In particular, the invention relates to copolymers of an isoolefin, preferably isobutylene,... | 02/19/2008 |
| 7332555 | Polymers with new sequence distributions The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel polymers with new sequence distributions. In particular, the invention relates to copolymers of an isoolefin, preferably isobutylene,... | 02/19/2008 |
| 7259214 | Metal catalyst for olefin polymerization and co-polymerization with functional monomers A catalyst is disclosed for the polymerization and co-polymerization of olefins with functionalized monomers. The catalyst is formed from a combination of two neutral metal complexes, L(iPr2)M(CH2Ph)(PMe3)[L=N-(2,6-diisopr... | 08/21/2007 |
| 7232872 | Polymerization processes The invention provides for a process to produce polymers utilizing a hydrofluorocarbon diluent. ... | 06/19/2007 |
| 7223824 | Multinuclear transition metal compound and catalyst system including the same A multinuclear transition metal compound which has two or more catalytic active sites, and is useful in preparing the olefin polymer and copolymer, is disclosed. The multinuclear transition metal compound for olefin polymerization includes two or more metals, and at... | 05/29/2007 |
| 7220805 | Process for producing contact product; catalyst component for addition polymerization; process for producing catalyst for addition polymerization; and process for producing addition polymer There are provided (1) a process for producing a contact product, which comprises the step of contacting at least a phthalocyanine complex, a porphyrin complex, or their combination with a surfactant; (2) a catalyst component for addition polymerization, which compr... | 05/22/2007 |
| 7214750 | Polymerization processes The invention relates to new processes to produce polymers utilizing bayonette cooled slurry reactor systems and diluents including hydrofluorocarbons. ... | 05/08/2007 |
| 7199074 | Catalytic composition and its preparation and use for preparing polymers from ethylenically unsaturated monomers A catalytic composition, including a cationic metal-pair complex, is disclosed, along with a method for its preparation. A method for the polymerization of ethylenically unsaturated monomers using the catalytic composition, and the addition polymers produced thereby... | 04/03/2007 |
| 7172986 | Catalytic composition and its preparation and use for preparing polymers from ethylenically unsaturated monomers A catalytic composition, including a cationic metal-pair complex, is disclosed, along with a method for its preparation. A method for the polymerization of ethylenically unsaturated monomers using the catalytic composition, and the addition polymers produced thereby... | 02/06/2007 |
| 7148302 | Catalyst for polymerization of norbornene This invention is based upon the discovery that a catalyst system which is comprised of (a) palladium or a palladium compound and (b) a fluorinated alcohol is effective for polymerizing norbornene-functional monomers into polynorbornene-functional polymers. It has b... | 12/12/2006 |
| 7148305 | Method of making interpolymers and products made therefrom Olefin polymers having a comb-like structure with at least 0.3 long-chain branches per 1000 carbon atoms are disclosed. Some compositions have a melt strength of about 5 cN at 190° C., and when made into a film have a CD shrink of at least 20%. Some compositions de... | 12/12/2006 |
| 7132491 | Chain transfer reagent, free radical polymerization employing the same and resulting polymers Organometallic reversible addition-fragmentation chain transfer reagents (RAFT reagents), processes of free radical polymerization employing the same and polymers with low polydispersity index obtained thereby. The process includes polymerizing at least one monomer ... | 11/07/2006 |
| 7112314 | Polymerization employing diacyl peroxide made in aprotic solvent This invention relates to a process for the synthesis of diacyl peroxide by contacting acyl halide and peroxide complex in compatible aprotic solvent substantially free of compounds oxidizable by the peroxide complex or the reaction products of organic acyl halide w... | 09/26/2006 |
| 7097855 | Transdermal thermal polymerization An invention for polymerizing or crosslinking a prepolymer using a water soluble, thermal polymerization initiator is disclosed. The prepolymer mixed with the initiator is injected or placed into an animal's body, and heat is applied over the site of the injection t... | 08/29/2006 |
| 7087687 | Catalytic composition and its preparation and use for preparing polymers from ethylenically unsaturated monomers A catalytic composition, including a cationic metal-pair complex, is disclosed, along with a method for its preparation. A method for the polymerization of ethylenically unsaturated monomers using the catalytic composition, and the addition polymers produced thereby... | 08/08/2006 |
| 7056994 | Catalyst composition The present invention relates to a catalyst composition for polymerization of a conjugated diene, comprising: (A) a metallocene-type complex represented by a general formula (I): (C5R1R2R3R4R5)a | 06/06/2006 |
| 6982305 | Olefin polymerization in the presence of a dehydrogenation catalyst A process for polymerizing olefins is disclosed. The process polymerizes an olefin in the presence of a dehydrogenation catalyst and an olefin polymerization catalyst. The dehydrogenation catalyst enables in-situ generation of alkenes from oligomers or solvent. The ... | 01/03/2006 |
| 6967184 | Fluoroalcohol leaving group for non-metallocene olefin polymerization catalysts A catalyst composition and method for olefin polymerization are provided. In one aspect, the catalyst composition is represented by the formula αaβbγgMXn wherein M is a metal; X is a halogenated aryloxy group; β and γ... | 11/22/2005 |
| 6943225 | Multinuclear metallocene catalyst The present invention relates to a multinuclear metallocene catalyst for olefin polymerization and a process for olefin polymerization using the same, in which the multinuclear metallocene catalyst for olefin polymerization comprises, as a main catalyst, a transitio... | 09/13/2005 |
| 6943226 | Multinuclear transition metal catalysts for preparation of multimodal polymer compositions Novel compounds are provided that are useful as catalysts, particularly in the polymerization of addition polymerizable monomers such as olefinic or vinyl monomers. The compounds are multinuclear complexes of transition metals coordinated to at least one unsaturated... | 09/13/2005 |
| 6924342 | Method of making interpolymers and products made therefrom A polymerization process comprises contacting one or more olefinic comonomers in the presence of at least a high molecular weight catalyst and at least a low molecular weight catalyst in a single reactor, and effectuating the polymerization of the olefinic comonomer... | 08/02/2005 |
| 6921795 | Manufacture of polyethylenes Blends of two or more polyethylenes are made by reacting ethylene with an oligomerization catalyst that forms α-olefins, and two polymerization catalysts, one of which under the process conditions copolymerizes ethylene and α-olefins, and the other of which under ... | 07/26/2005 |
| 6897273 | Catalyst composition, method of polymerization and polymer therefrom This invention relates to a process to polymerize olefin(s) comprising combining a solution, slurry or solid comprising one or more bulky ligand metallocene catalyst compounds, an optional support, and or one or more activator(s) with a solution comprising one or mo... | 05/24/2005 |
| 6894128 | Catalyst composition, method of polymerization, and polymer therefrom Catalyst compositions and methods useful in polymerization processes utilizing at least two metal compounds are disclosed. At least one of the metal compounds is a Group 15 containing metal compound and the other metal compound is preferably a bulky ligand metalloce... | 05/17/2005 |
| 6825292 | Polymerization process A process for transitioning between two catalysts is disclosed, comprising the steps of a) discontinuing the feed of the first catalyst into the polymerization reactor, and then b) introducing the second catalyst into the reactor, wherein one of the catalysts compri... | 11/30/2004 |
| 6723807 | Catalyst component and catalyst for addition polymerization, and process for producing addition polymer A catalyst obtained by contacting a transition metal compound (A) of the general formula [1]: [LpXoCpjM(N2)nM′XmLl]X′k [1], wherein M an... | 04/20/2004 |
| 6703457 | Propylene polymers and process for the preparation thereof A process for preparing propylene polymer comprising contacting, under polymerization conditions, propylene and optionally ethylene, with a catalyst system comprising a bridged metallocene and a suitable activating cocatalyst, said process being charactei... | 03/09/2004 |
| 6699813 | Lanthanide-based catalyst composition for the manufacture of polydienes A catalyst composition that is the combination of or the reaction product of ingredients comprising (a) an lanthanide compound, (b) an alkylating agent, (c) a nickel-containing compound, and optionally (d) a halogen-containing compound, with the proviso t... | 03/02/2004 |
| 6686428 | Metal catalyzed reactions Compositions and processes of forming chemical bonds, such as carbon-carbon and carbon-heteroatom bonds are provided. The compositions include at least one -halo carbonyl compound, and one or more transmetallation reagents. The transmetallation rea... | 02/03/2004 |
| 6686306 | Supported dual transition metal catalyst systems A coordination catalyst system comprising at least one metallocene or constrained geometry pre-catalyst transition metal compound, (e.g., rac-ethylene bis(indenyl)zirconium dichloride), at least one non-metallocene, non-constrained geometry, bidentate tra... | 02/03/2004 |
| 6664347 | Polybutadiene and process for producing the same Modified polybutadiene having a high-cis and low-trans structure with a moderate 1,2-structure content and exhibiting improved characteristics such as cold flow properties, which is obtained by modifying starting polybutadiene having a Tcp/ML1+4 | 12/16/2003 |
| 6593437 | Metal organic catalysts for polymerizing unsaturated compounds A process for preparing 1,2-diimine compounds of the formula I ##STR1## where R1 and R2 are, independently of one another, alkyl, aryl or metallocenyl radicals, and R3, R4 are, independently of one another, H, a... | 07/15/2003 |
| 6593442 | Semicrystalline propylene polymer compositions with good suitability for producing biaxially oriented films A semicrystalline propylene polymer composition with good suitability for producing biaxially oriented films and prepared by polymerizing propylene, ethylene and/or C4 -C18 -1-alkenes, where at least 50 mol % of the monomer units pre... | 07/15/2003 |
| 6586542 | Process for controlling degree of branch of high 1,4-cis polybutadiene Disclosed is a process of controlling the degree of branch of high 1,4-cis polybutadiene without any alternation in the 1,4-cis content and the polymerization yield, in which a dialkylzinc compound represented by the following formula I is added in a cont... | 07/01/2003 |
