U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Icon_funbox Bizarre Patents

Patent No. 5307162

Cloaking System Using Optoelectronically Controlled Camouflage

A Cloaking System designed to operate in the visible light spectrum, utilizes optoelectronics and/or photonic components to conceal an object within it.

Newsletter  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.

 

Preisch, Nadine


Primary examiner statistics: 59 patents; average approval time: 872 days
Assistant examiner statistics: 221 patents; average approval time: 847 days

Patents as Primary Examiner

1    
NumberTitleIssue Date
6533924Method for desulfurizing gasoline or diesel fuel for use in an internal combustion engine
A fuel processing method is operable to remove substantially all of the sulfur present in an undiluted oxygenated hydrocarbon fuel stock supply which contains an oxygenate and which is used to power an internal combustion engine in a mobile environment, s...
03/18/2003
6495029Countercurrent desulfurization process for refractory organosulfur heterocycles
A process for the hydrodesulfurization (HDS) of the multiple condensed ring heterocyclic organosulfur compounds present in petroleum and chemical streams. The stream is passed through at least one reaction zone countercurrent to the flow of a hydrogen-con...
12/17/2002
6495028Catalytic conversion process for producing isobutane and isoparaffin-enriched gasoline
A process for catalytic conversion of hydrocarbon feedstock to produce isobutane and isoparaffin-enriched gasoline which comprises two different reactions, the preheated feedstock is contacted with hot regenerated catalyst in the lower part of a reactor w...
12/17/2002
6482316Adsorption process for producing ultra low hydrocarbon streams
The instant invention is directed to a method for reducing the amount of sulfur in hydrocarbon streams comprising the steps of: (a) contacting a hydrocarbon stream comprising hydrocarbons and sulfur compounds with an adsorbent selective for adsorption of said ...
11/19/2002
6482311Methods for suppression of filamentous coke formation
Materials and methods for inhibiting the formation of filamentous coke on heated metal surfaces. Organoselenium compounds, including diarylselenides, diaryldiselenides, alkylarylselenides, and alkylaryldiselenides, are employed as hydrocarbon feedstock ad...
11/19/2002
6464859Process for deacidifying a crude oil system
This invention relates to a process for deacidifying a crude oil system, said process comprising the steps of: a) contacting the crude oil system with a polar solvent, such that at least part of the organic acid present in the oil is extracted into the solvent...
10/15/2002
6461497Reformulated reduced pollution diesel fuel
A reformulated diesel fuel meeting the requirements of ASTM D975-96a for a low-sulfur number 2 diesel fuel and providing reduced emission benefits relative to a certified diesel fuel, certified under Section 2282(g) Title 13, California Code of Regulation...
10/08/2002
6461992Method for reducing chloride emissions from a moving bed catalyst regeneration process
A method is disclosed for decreasing the emissions of chlorine-containing species from a moving bed process for regenerating spent catalyst particles with a recycle gas stream. A recycle gas stream contacts spent catalyst particles at regeneration conditi...
10/08/2002
6458266Catalytic reforming process with inhibition of catalyst deactivation
A substantially water-free hydrocarbon feed is charged to a multiple-reactor reformer system being operated under reforming conditions and comprising at least two reformer reactors serially connected in fluid-flow communication and each containing a refor...
10/01/2002
6455750Process for selectively producing light olefins
The invention is related to a catalyst and a process for selectively producing light (i.e., C2 -C4) olefins from a catalytically cracked or thermally cracked naphtha stream. The naphtha stream is contacted with a catalyst containing ...
09/24/2002
6454935Method for desulfurizing gasoline or diesel fuel for use in a fuel cell power plant
A fuel processing method is operable to remove substantially all of the sulfur present in an undiluted oxygenated hydrocarbon fuel stock supply which contains an oxygenate and which is used to power a fuel cell power plant in a mobile environment, such as...
09/24/2002
6454932Multiple stage ebullating bed hydrocracking with interstage stripping and separating
High boiling hydrocarbon materials are hydrocracked in a multiple stage process having ebullating catalyst bed hydrogenation reactor stages in series. Between the hydrogenation reactors is an interstage separator/stripper to separate a vapor phase and to ...
09/24/2002
6454934Petroleum processing method
A petroleum processing method comprising the steps of: performing an atmospheric distillation of crude oil; collectively hydrodesulfurizing the resultant distillates consisting of gas oil and fractions whose boiling point is lower than that of gas oil in ...
09/24/2002
6444117Sweetening of sour crudes
The general object of this invention is to provide an improved process for sweetening and desulfurizing sulfur-containing crude oil streams. Heating the sulfur-containing crude oil stream to an elevated temperature for an extended period of time while sti...
09/03/2002
6441263Ethylene manufacture by use of molecular redistribution on feedstock C3-5 components
A process for preparing an ethylene-rich composition from a C3-5 paraffinic feedstock is described. The C3-5 paraffinic feedstock is subjected to molecular redistribution via dehydrogenation to form olefins, metathesis of the olefins...
08/27/2002
6428686Two phase hydroprocessing
A process where the need to circulate hydrogen through the catalyst is eliminated. This is accomplished by mixing and/or flashing the hydrogen and the oil to be treated in the presence of a solvent or diluent in which the hydrogen solubility is "high" rel...
08/06/2002
6425998Process for detecting impurities in liquid metal heat exchange fluid in high hydrogen permeation environment
A process for using a hydrogen sensor in a liquid metal heat exchange loop in a hydrocarbon conversion process with high hydrogen permeation. The hydrogen sensor of the present invention consists essentially of a hollow nickel membrane probe in intimate c...
07/30/2002
6423210Process for dehydrating a mineral oil or other solvents for the preparation of moisture-in-oil or moisture-in-solvent standards
An oil, such as a mineral oil, for example, transformer oil, is contacted with calcium carbide and the mixture is stirred until a liquid phase containing less than 1 ppm water and a solid phase containing Ca(OH)2 and unreacted CaC2 a...
07/23/2002
6423293Oxygen storage material for automotive catalysts and process of using
The invention is a mixed oxide oxygen storage material useful as a catalyst or catalyst washcoat. The mixed oxide is praseodymium oxide loaded onto a support of either cerium oxide or cerium-zirconium oxide. The praseodymium oxide is loaded on the support...
07/23/2002
6419820Catalytic reforming process employing a selective bifunctional multigradient multimetallic catalyst
A novel catalyst and the use thereof in a reforming process is disclosed. The catalyst comprises a refractory inorganic oxide, platinum-group metal, uniform Group IVA(IUPAC 14) metal and surface-layer lanthanide-series metal. The catalyst is particularly ...
07/16/2002
6416656Catalytic cracking process for increasing simultaneously the yields of diesel oil and liquefied gas
This discloses a process for catalytically cracking hydrocarbon stocks in a riser or fluidized bed reactor simultaneously to increase yields of diesel and liquefied gas. The process includes the steps of: first, charging a gasoline stock and a catalytic c...
07/09/2002
6416659Process for the production of an ultra low sulfur
A process for the hydrodesulfurization of a diesel boiling range petroleum fraction wherein the hydrodesulfurization is carried out concurrently with a fractional distillation in a distillation column reactor containing a catalyst bed. The diesel is fed a...
07/09/2002
6416657Method for the isomerization of gasoline with a high benzene content
A method for the isomerization of a hydrocarbonic charge containing a substantial quantity of paraffin base hydrocarbons with 5 or 6 carbon atoms and a benzene content that is greater than or equal to 2% by weight, in which the charge to be treated passes...
07/09/2002
6416655Selective extraction using mixed solvent system
A method for concentrating the amount of alkylated mono-aromatics in a lubricating oil feedstock useful as a feedstock for sulfonation. The method comprises extracting a feedstock rich in aromatics with a solvent selected from NMP, phenol and furfural, sa...
07/09/2002
6406613Mitigation of coke deposits in refinery reactor units
A method for mitigating the condensation of liquid hydrocarbons and subsequent coke deposition in refinery reactor units by dew point suppression....
06/18/2002
6406616Process for removing low amounts of organic sulfur from hydrocarbon fuels
A process for desulfurizing hydrocarbons such as gasoline and similar petroleum products to reduce the sulfur content to a range of from about 2 to 15 ppm sulfur without affecting the octane rating is described. The sulfur containing hydrocarbon is contac...
06/18/2002
6402940Process for removing low amounts of organic sulfur from hydrocarbon fuels
A process for desulfurizing fuels such as diesel oil and similar petroleum products to reduce the sulfur content to a range of from about 2 to 15 ppm sulfur is described. The sulfur containing fuel is contacted at slightly elevated temperatures with an ox...
06/11/2002
6398950Hydrogenation catalyst and method of hydrogenating heavy oil
The present invention relates to a catalyst for hydrogenation treatment in which Mo--Ni, Mo--Co or the like is supported on an alumina-type carrier, and a method for hydrogenation treatment of heavy oil using the same. More specifically, it relates to the...
06/04/2002
6395166Method of reclaiming used motor oil for further use
A method of reclaiming used motor oil for further use is disclosed comprising (a) admixing used impurity laden motor oil with an effective amount of acetone as a flocculating agent and an effective amount of a second ketone as a wetting agent thereby form...
05/28/2002
6388152Process for producing polypropylene from C3 olefins selectively produced in a fluid catalytic cracking process
A process for producing polymers from olefins selectively produced from a catalytically cracked or thermally cracked naphtha stream is disclosed herein. The naphtha stream is introduced into a process unit comprised of a reaction zone, a stripping zone, a...
05/14/2002
6383366Wax hydroisomerization process
Waxy feeds are treated under hydroisomerization conditions to produce good yields of an isomerate product of high VI by using a silica-alumina based catalyst in which the silica-alumina has a pore volume less of 0.99 ml/gm (H2 O), an alumina co...
05/07/2002
6380452Isomerization process using membrane for recovery of halides
A process for recovering halides from hydrocarbon containing streams is disclosed using a sulfonated hexafluro bis-A-polysulfone membrane of polymers and copolymers having the polymer repeat unit of the formula: ##STR1## in the polymer or copolymer. This ...
04/30/2002
6379532Hydrocracking process
A hydrocracking process wherein the undesirable production of polynuclear aromatic compounds is controlled by removing a small dragstream of high pressure product stripper bottoms to reject polynuclear aromatic compounds and recovering valuable diesel boi...
04/30/2002
6372121Reducing undesired polymerization in the basic wash unit of hydrocarbon cracking process
This invention is a method to inhibit the polymerization of carbonyl compounds in a basic wash unit operation in a hydrocarbon cracking process, wherein a compound selected from the group consisting of alpha-amino acids and esters thereof and amides there...
04/16/2002
6372123Method of removing water and contaminants from crude oil containing same
A method for contaminant and water removal from crude oil. The method involves recirculating at least a portion of the dewatered crude into a dehydrator. The dehydrator contains a heated dehydrated crude oil and the surface or adjacent thereto is maintain...
04/16/2002
6368494Method for reducing coke in EDC-VCM furnaces with a phosphite inhibitor
A method of reducing the formation of coke deposits on the heat-transfer surfaces of an ethylene dichloride to vinyl chloride pyrolysis furnace comprising exposing the heat transfer surfaces of said pyrolysis furnace to a phosphite selected from the group...
04/09/2002
6368495Removal of sulfur-containing compounds from liquid hydrocarbon streams
A novel process effective for the removal of organic sulfur compounds from liquid hydrocarbons is disclosed. The process more specifically addresses the removal of thiophenes and thiophene derivatives from a number of petroleum fractions, including gasoli...
04/09/2002
6361683Hydrocracking process
A catalytic hydrocracking process wherein a hydrocarbonaceous feedstock and a liquid recycle stream having a temperature greater than about 500° F. and saturated with hydrogen is contacted with hydrogen in a hydrocracking reaction zone at elevated temper...
03/26/2002
6358400Selective reforming process for the production of aromatics
A reforming process, selective for the dehydrocyclization of paraffins to aromatics, is effected using a large-pore molecular-sieve catalyst containing a uniformly distributed platinum-group metal component, and a tin component incorporated into the large...
03/19/2002
6358402Extractive distillation process for the reduction of sulfur species in hydrocarbons streams
A method for separating sulfur species from hydrocarbon streams, particularly cracked naphtha streams, using extractive distillation. The method effectively separates sulfur species from cracked naphtha streams without substantially lowering the olefin co...
03/19/2002
1    
 
Sign InRegister
Username  
Password   
forgot password?