Famous Patents
The first commercial microwave oven was nearly 6 feet tall and weighed in at 750 pounds.
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 |
| 7414162 | Water-soluble phenylenediamine compositions and methods for stabilizing ethylenically unsaturated compounds and monomers Compositions and methods for inhibiting polymerization of ethylenically unsaturated monomers are provided. The compositions include a water-soluble phenylenediamine composition. ... | 08/19/2008 |
| 7371906 | Process for photo-oxidative stability improvements A process for improving the stability to photo-oxidation of a polycyclic aromatic compound having at least two polymorphic forms comprises treating a first polymorph with one or more solvents to obtain the more stable second polymorph and then separating the second ... | 05/13/2008 |
| 7282600 | Method for inhibiting polymerization during the recovery and purification of unsaturated mononitriles Economical processes are disclosed for recovery and refining of valuable nitrogen-containing organic compounds formed by catalytic oxidation of least one feed compound selected from the group consisting of propane, propylene, isobutane and isobutylene in the presenc... | 10/16/2007 |
| 7276636 | Styrene process with recycle from dehydrogenation zone A styrene process is disclosed that uses a dehydrogenation reactor and a transalkylation reactor and in which a significant portion of the benzene, the inhibitors, or both, recovered from the dehydrogenation reactor passes to the transalkylation reactor. The process... | 10/02/2007 |
| 7157611 | Pyrazinoporphyrazines as markers for liquid hydrocarbons A method for marking a liquid petroleum hydrocarbon. The method comprises adding to the liquid petroleum hydrocarbon a pyrazinoporphyrazine dye having an absorption maximum from 700 nm to 900 nm. ... | 01/02/2007 |
| 7128826 | Polymerization inhibitor for styrene dehydrogenation units Quinone methide derivatives such as 4-benzylidene-2,6-di-tert-butyl-cyclohexa-2,5 dienone are used to inhibit styrene monomer polymerization in the dehydrogenator portion of a styrene monomer production system. The inhibitor contacts the dehydrogenation effluent and... | 10/31/2006 |
| 7125475 | Nitrosophenols and C-nitrosoanilines as polymerization inhibitors Inhibitor blends that include both nitrosophenols and nitrosoanilines, optionally in combination with air or oxygen, reduce the premature polymerization of ethylenically unsaturated monomers. unsaturated monomers. ... | 10/24/2006 |
| 7094939 | Styrene process with recycle from dehydrogenation zone A styrene process is disclosed that uses a dehydrogenation reactor and a transalkylation reactor and in which a significant portion of the benzene, the inhibitors, or both, recovered from the dehydrogenation reactor passes to the transalkylation reactor. The process... | 08/22/2006 |
| 7045647 | Blends of quinone alkide and nitroxyl compounds and polymerization inhibitors Disclosed herein is a method for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of: A) at least one nitroxyl compound, and B) at least one quinone alkide compound having an electro... | 05/16/2006 |
| 7022220 | C-nitrosoaniline compounds and their blends as polymerization inhibitors Disclosed herein is a method for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of at least one inhibitor selected from the group consisting of C-nitrosoaniline and quinone imine o... | 04/04/2006 |
| 6969744 | Living and quasiliving cationic telechelic polymers quenched by N-substituted pyrrole and methods for their preparation Disclosed is a method of preparing terminally functionalized telechelic polymers using a cationic living polymer product or a terminal tert-chloride chain end of a carbocationic quasiliving polymer product, which comprises quenching the polymer product with an N-sub... | 11/29/2005 |
| 6902663 | C-nitrosoaniline compounds and their blends as polymerization inhibitors Disclosed herein is a method for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of at least one inhibitor selected from the group consisting of C-nitrosoaniline and quinone imine o... | 06/07/2005 |
| 6841061 | Antigelling agent for hydrocarbon mixture containing conjugated diene and method of preventing clogging of apparatus for separating and purifying the mixture An Anti-gelling agent for a hydrocarbon mixture containing a conjugated diene, which comprises (a) at least one compound selected from the group consisting of compounds having an NO radical in the molecule, and precursor compounds capable of forming an NO radical, (... | 01/11/2005 |
| 6835288 | Method for preventing undesired polymerization in a mixture of substances containing ethylenically unsaturated compounds A process for preventing undesired polymerization is conducted by maintaining an effective concentration of a stabilizer which comprises N-oxyl radicals in a mixture containing ethylenically unsaturated compounds, wherein (i) an el... | 12/28/2004 |
| 6717021 | Solvating component and solvent system for mesophase pitch A solvating component for a solvated mesophase pitch. The solvated component includes a mixture of aromatic hydrocarbons having boiling points in the atmospheric equivalent boiling point range of about 285° to about 500° C. (about 550° F.-932° F.). At least 80% ... | 04/06/2004 |
| 6660181 | Inhibition of polymerization of unsaturated monomers A method is disclosed for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers a polymerization inhibiting amount of a mixture comprising A) a first inhibitor comprising 4-amino-2,2,6,6-tetramethy... | 12/09/2003 |
| 6653414 | Inhibition of polymerization of unsaturated monomers Disclosed herein is a method for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of a mixture comprising: A) at least one stable hindered nitroxyl compound having the stru... | 11/25/2003 |
| 6579442 | Methods and compositions for inhibiting polymerization of vinyl monomers Methods and compositions for inhibiting the polymerization of vinyl monomers are disclosed. Combinations of nitroxyl compounds and aliphatic amines are effective at inhibiting the polymerization of vinyl monomers under both processing and storage conditio... | 06/17/2003 |
| 6518453 | Method for stabilizing chemical compounds containing at least one ethylenically unsaturated bond in order to prevent undesirable radical polymerization In a process for stabilizing chemical compounds having at least one ethylenically unsaturated bond to undesired free radical polymerization, a nitroxyl radical and a chemical compound containing phosphorus in chemically bonded form are added to the unsatu... | 02/11/2003 |
| 6475348 | Mixture of substances containing compounds with vinyl groups and stabilizers A mixture contains one or more vinyl-containing compounds as component (A) and, as a further component, a stabilizer (B) which contains one or more readily volatile nitroxyl compounds as component (b1), one or more sparingly volatile nitroxyl c... | 11/05/2002 |
| 6409887 | Polymerization inhibitor A monomer composition, stabilized against premature polymerization, comprising: a) an ethylenically unsaturated monomer or mixture of monomers polymerizable by free radical initiation, and b) an effective amount, sufficient to inhibit premature polymeriza... | 06/25/2002 |
| 6403850 | Inhibition of polymerization of unsaturated monomers Disclosed herein is a method for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of: A) at least one stable hindered nitroxyl compound having the structural formula: ... | 06/11/2002 |
| 6395943 | Process for inhibiting the polymerization of vinyl aromatic compounds A process is disclosed for inhibiting the polymerization of vinyl aromatic compounds, such as styrene, during its distillation. The process involves adding a mixture of at least two inhibitors to the vinyl aromatic compound. One such combination is N... | 05/28/2002 |
| 6395942 | Increasing the thermal stability of a vinyl aromatic polymerization inhibitor Compounds that inhibit polymerization of vinyl aromatic compounds need to operate at temperatures of about 90° C. to about 150° C. A process for increasing the thermal stability of inhibitors such as N,N'-di-2-butyl-N,N'-dinitroso-1,4-diaminobenzene is ... | 05/28/2002 |
| 6379588 | Stabilized monomer composition A monomer composition, which contains A) vinyl-containing monomers in which a heteroatom selected from the group consisting of the halogens, nitrogen, oxygen, sulfur and silicon is present on the vinyl group, and B) a compound or a mixture of compounds of the ... | 04/30/2002 |
| 6376728 | Method, composition and mixture for inhibiting monomer polymerization Method of inhibiting polymerization of alkenyl monomers comprising contacting the alkenyl monomers with: ##STR1## wherein R1 and R2 independently of one another are alkyl, phenyl, aryl, alkoxy, or carboxy groups; and oxygen. Mixture ... | 04/23/2002 |
| 6348136 | Method and apparatus for the purification of vinyl aromatic compounds The present invention is directed to an apparatus and method for the distillation of a readily polymerizable vinyl aromatic compound employing a polymerization inhibitor. The vinyl aromatic compound is subjected to distillation in at least one fractionati... | 02/19/2002 |
| 6342648 | Methods and compositions for inhibiting vinyl aromatic monomer polymerization The present invention provides compositions and methods inhibiting polymerization of vinyl aromatic compounds comprising a bisphenol compound and an oxidized p-phenylenediamine. In a specific, non-limiting embodiment, the polymerization of the vinyl aroma... | 01/29/2002 |
| 6342647 | Vinyl monomer polymerization inhibition using hindered hydroxylamines It has been discovered that the polymerization of vinyl aromatic compounds, such as styrene, may be inhibited by the addition of a composition that contains a hindered hydroxylamine, and, optionally, a synergist together with the hindered hydroxylamine. I... | 01/29/2002 |
| 6339051 | Diesel engine cylinder oils Diesel engine cylinder oils of improved cleanliness and load carrying ability and reduced port deposit characteristics for use in marine and stationary slow speed diesel engines are based on medium heavy Group I or Group II neutral base oils, typically fr... | 01/15/2002 |
| 6337426 | Antifoulant compositions and processes Industrial plant streams and processes that contain reactive light olefins such as isoprene and butadiene are plagued with fouling problems due to premature polymerization resulting in significant economic loss. A combination of phenylenediamines with nit... | 01/08/2002 |
| 6300533 | Inhibition of polymerization of ethylenically unsaturated monomers Disclosed herein is a method for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of an inhibitor having the structural formula: ##STR1## wherein R1 and R4... | 10/09/2001 |
| 6262323 | Polymerization inhibition of isoprene It has been discovered that the polymerization of diene compounds, such as isoprene, may be inhibited by the addition of a composition that contains a at least one phenylenediamine, at least one sterically hindered phenol, and at least one hydroxylamine. ... | 07/17/2001 |
| 6252106 | Method for stabilizing a sex pheromone compound An efficient method is proposed for the stabilization of a sex pheromone compound of insect pest, which is a long-chain aliphatic unsaturated ester, alcohol, ketone or hydrocarbon compound having at least ten carbon atoms and at least one double bond in a... | 06/26/2001 |
| 6231662 | Surface treatments for titanium dioxide and other industrial pigments An additive for enhancing the performance of industrial pigments. The additive improves dispersibility and is the reaction product of an amine, a fatty amine, and a polybasic acid.... | 05/15/2001 |
| 6222080 | Benzoquinoneimines as vinyl aromatic polymerization inhibitors This invention relates to a vinyl aromatic, especially styrene, polymerization inhibitor system comprising an N-phenyl-1,4-benzoquinoneimine compound and optionally an aryl-substituted phenylenediamine.... | 04/24/2001 |
| 6200460 | Substance mixtures containing stabilizers and compounds containing vinyl groups Substance mixtures comprising (A) vinyl-containing compounds, (B) an active amount of a mixture inhibiting the premature polymerization of the vinyl-containing compounds, comprising (i) at least one N-oxyl compound of a secondary amine which carries no hydroge... | 03/13/2001 |
| 6180699 | Blend for preventing or retarding the formation of gas hydrates A composition is provided herein for preventing or retarding the formation of gas hydrates or for reducing the tendency of gas hydrates to agglomerate, during the transport of a fluid comprising water and a hydrocarbon, through a conduit. The composition ... | 01/30/2001 |
| 6143205 | Mixtures containing monomers and stabilizers Mixtures contain (A) vinyl-containing monomers, and (B) an effective amount of a mixture inhibiting the premature polymerization of the vinyl-containing monomers during the purification or distillation and containing (i) from 0.05 to 4.5% by weight, based on t... | 11/07/2000 |
| 6117276 | Inhibiting polymerization of vinyl aromatic monomers When a nitroxyl compound is heated in an oxygen-free atmosphere with a vinyl aromatic monomer at 50-140° C. for up to 60 days, it forms an activated inhibitor mixture which is superior to the nitroxyl compound itself in preventing the premature polymeriz... | 09/12/2000 |
