Famous Patents
In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
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 |
| 5211721 | Polyoxyalkylene ester compounds and ORI-inhibited motor fuel compositions Motor fuel compositions comprising gasoline are improved to control octane requirement increase (ORI) by including an ester of a carboxylic acid and a polyether polyol, preferably a polyether polyol including oxyethylene, oxypropylene and oxybutylene segm... | 05/18/1993 |
| 4869728 | Motor fuel additive and ORI-inhibited motor fuel composition A motor fuel composition which inhibits engine ORI comprises a mixture of hydrocarbons boiling in the range of 90° F.-450° F. and the reaction product of one or more substituted or unsubstituted aliphatic carboxylic acids, including acyl-containing alip... | 09/26/1989 |
| 4865621 | Ori-inhibited and deposit-resistant motor fuel composition A motor fuel composition which inhibits engine ORI and resists engine and carburetor deposit formation comprises a mixture of hydrocarbons boiling in the range of 90° F.-450° F. and the reaction product of a dibasic acid anhydride, a polyoxyalkylene mon... | 09/12/1989 |
| 4865622 | ORI-inhibited and deposit-resistant motor fuel composition A motor fuel composition which inhibits engine ORI and resists engine deposit formation comprises a mixture of hydrocarbons boiling in the range of 90° F.-450° F. and the reaction product of a dibasic acid anhydride, a polyoxyalkylene diamine, and a het... | 09/12/1989 |
| 4865745 | Method of treating dilute aqueous solutions A dilute aqueous solution of isopropanol is concentrated by reverse osmosis across a membrane of polyethyleneimine which has been cross-linked with 2,4-toluene diisocyanate.... | 09/12/1989 |
| 4866632 | Control means and method for solvent refining unit The control system and method of the present invention controls a solvent refining unit which treats charge oil with a solvent in a refining tower to yield raffinate and extract-mix, strippers separate the solvent from the raffinate and from the extract-m... | 09/12/1989 |
| 4863489 | Production of demercurized synthesis gas, reducing gas, or fuel gas A process for the production of demercurized synthesis gas, reducing gas or fuel gas. Mercury-containing fossil fuels e.g. coal were reacted by partial oxidation to produce gaseous mixtures comprising H2, CO, H2 O, CO2, H | 09/05/1989 |
| 4863623 | Novel VI improver, dispersant, and anti-oxidant additive and lubricating oil composition containing same An additive composition comprising a graft and amine-derivatized copolymer prepared from ethylene and at least one C3 -C10 alpha-monoolefin and, optionally, a polyene selected from non-conjugated dienes and trienes comprising from ab... | 09/05/1989 |
| 4861346 | Stable aqueous suspension of partial oxidation ash, slag and char containing polyethoxylated quaternary ammonium salt surfactant A pumpable stable aqueous suspension of ash, slag, and char particulate matter produced by the partial oxidation of a carbonaceous charge fuel comprises 1.0-50.0 wt. % particulate matter selected from the group consisting of ash, slag, and char and mixtur... | 08/29/1989 |
| 4862001 | Radiant energy absorption steam quality monitoring means and method A steam quality monitor measures the quality of steam flowing in a steam pipe. A measurement cell is connected in the steam pipe so that steam flows through the measurement cell. The cell has two windows aligned along an axis which is traverse to the flow... | 08/29/1989 |
| 4857229 | Partial oxidation process of sulfur, nickel, and vanadium-containing fuels Synthesis gas is produced by the partial oxidation of a fuel feedstock comprising a heavy liquid and/or petroleum coke having a sulfur, nickel and vanadium-containing ash. An additive comprising basalt is introduced into the reaction zone along with the f... | 08/15/1989 |
| 4857661 | Bicyclic keto-acids preparation Alkyl substituted or unsubstituted, bicyclic keto acids may be prepared by cyclizing unsaturated, cyclic dicarboxylic acid anhydrides in the presence of a strong Bronsted acid catalyst. The products may be useful as corrosion inhibitors in alcohol fuels a... | 08/15/1989 |
| 4854725 | Multi-sensor steam quality monitoring means and method A system of the present invention monitors the quality of steam flowing in a pipeline includes a test cell which is connected inline into the pipeline and has the steam flowing through it. A plurality of electrodes are located within the test cell and coo... | 08/08/1989 |
| 4852993 | ORI-inhibited and deposit-resistant motor fuel composition ORI-inhibited and deposit-resistant motor fuel composition comprises a mixture of hydrocarbons boiling in the range of 90° F.-450° F. and (I) the reaction product of a dibasic acid anhydride, a polyoxyalkylene diamine, and a hydrocarbyl polyamine; and (... | 08/01/1989 |
| 4850432 | Manual port closing tool for well cementing In a downhole staging apparatus for delivering fluidized cement sequentially into two levels of substrate which enclose a wellbore casing. Said apparatus comprises a primary cement discharge port, and one or more secondary or lateral cement discharge port... | 07/25/1989 |
| 4851151 | Process for production of synthesis gas with reduced sulfur content A process for the partial oxidation of a sulfur- and silicate-containing carbonaceous fuel to produce a synthesis gas with reduced sulfur content which comprises partially oxidizing said fuel at a temperature in the range of 1800°-2200° F. in the presen... | 07/25/1989 |
| 4851152 | Prevention of formation of nickel subsulfide in partial oxidation of heavy liquid and/or solid fuels A sulfur-containing heavy liquid hydrocarbonaceous fuel and/or solid carbonaceous fuel with nickel, vanadium, and silicon containing ashes is mixed with a copper and/or cobalt-containing material to provide a weight ratio of copper and/or cobalt to nickel... | 07/25/1989 |
| 4851145 | Corrosion-inhibited antifreeze/coolant composition A corrosion inhibitor for use in aqueous and liquid alcohol compositions is described comprising the combination of: (a) an alkylbenzoic acid or the alkali metal, ammonium, or amine salt thereof, said acid having the general formula ##STR1## where R... | 07/25/1989 |
| 4849988 | Apparatus and method for measuring the quality of steam Steam quality measuring and monitoring apparatus and methods which measures the quality of steam flowing in a steam pipe includes a test cell connected in line with the steam pipe so that the steam flows through the test cell. The capacitance, the dielect... | 07/18/1989 |
| 4849687 | Steam quality monitoring means and method A steam quality monitor monitoring the quality of steam flowing in the pipe includes capacitance sensing apparatus which senses the capacitance of the flowing steam and provides a capacitance signal corresponding to the said capacitance. Another sensor wh... | 07/18/1989 |
| 4845157 | Diesel fuel compositions containing polyolefin graft polymers A diesel fuel of improved flow properties at low temperatures which contains a linear, substantially oil-soluble polymer having a carbon-carbon backbone bering a graft moiety derived from, as a graft monomer, an unsaturated-hydrocarbon ester of an (C... | 07/04/1989 |
| 4842756 | Multifunctional viscosity index improver Lubricating oils of improved oxidative stability, dispersancy, and viscosity index contain ethylene-propylene copolymer bearing allyl glycidyl ether or glycidyl methacrylate graft monomer--which has been functionalized with 2,5-dimethyl aniline or 2,6-dim... | 06/27/1989 |
| 4836943 | Anti-oxidant system An oil containing a viscosity index improver of improved oxidative stability contains, as an anti-oxidant system 2,6-di-t-butylphenol and 1-3-aminopropyl-2-pipecoline.... | 06/06/1989 |
| 4834897 | Gear oil lubricant additive composition This invention provides a gear oil lubricant composition which comprises (a) a major portion of a gear lubricating oil, and (b) a minor amount of, as a friction modifying agent, a reaction product of hydrocarbon-substituted amine, a dibasic acid anhydride and a ... | 05/30/1989 |
| 4835744 | Marine seismic data acquisition system and method A marine seismic data acquisition system and method includes a plurality of hydrophone arrays. A marine cable is towed in the water by a boat. The marine cable includes a plurality of active modules. Each active module is connected to a corresponding hydr... | 05/30/1989 |
| 4832503 | Steam quality monitoring means and method The present invention is an apparatus and method which monitors the quality of steam flowing in a pipe. A steam sensor located in the pipe provides a steam signal which is frequency related to the quality of the steam flowing in the pipe. A network connec... | 05/23/1989 |
| 4832124 | Subsea well head template Where a subsea well is completed for production or water injection service, a subsea christmas tree must sealably connect with both the wellhead and the pipeline(s) or subsea manifold template pipework in order that fluids may flow out of (or into) the we... | 05/23/1989 |
| 4827772 | Differential pressure sensing means and method A differential pressure sensing means and method includes an inlet receiving a fluid having a first pressure. Another inlet receives a fluid having a second pressure. A plurality of pressure sensing devices are connected to the first and second inlets. Ea... | 05/09/1989 |
| 4828578 | Internally channelled gasifier quench ring A reactor for gasifying a carbonaceous fuel to produce usable gas, and comprising an insulated outer shell. A reaction chamber within the shell which receives a fuel mixture from an injection burner. The products or effluent of gasification include hot pr... | 05/09/1989 |
| 4828579 | Thermally insulated quench ring for a gasifier Reactor for gasifying a carbonaceous fuel to produce a usable gas, and comprising an insulated outer shell. A reaction chamber within the shell receives a fuel mixture from an injection burner. The products or effluent of gasification include hot produced... | 05/09/1989 |
| 4828580 | Quench ring insulating collar Reactor for gasifying a carbonaceous fuel to produce a usable gas, and comprising an insulated outer shell. A reaction chamber within the shell receives a fuel mixture from an injection burner. The products or effluent of gasification include hot produced... | 05/09/1989 |
| 4826613 | Lubricating oil containing dispersant viscosity index improver Lubricating oil of improved dispersancy and viscosity index contains ethylene-propylene polymer bearing glycidyl methacrylate graft which as been functionalized with mercaptoacetic acid.... | 05/02/1989 |
| 4826627 | Partial oxidation process Synthesis gas is produced by the partial oxidation of a feedstock comprising petroleum coke and/or heavy liquid hydrocarbonaceous fuel containing sulfur and having an ash that contains nickel, vanadium and silicon. An iron-containing additive is introduce... | 05/02/1989 |
| 4826768 | Polyoxyalkylene glycol conversion to monocarboxylic acid A method for converting a polyoxyalkylene glycol to the corresponding monoacid which comprises forming a mixture of a polyoxyalkylene glycol, a Gluconobacter species and a nutrient medium is provided.... | 05/02/1989 |
| 4824869 | Base-modified metal oxide catalysts for the conversion of synthesis gas to alcohols A method for preparing a mixture of lower aliphatic alcohols from the reaction of carbon monoxide and hydrogen in the presence of an oxide-containing heavy metal catalyst under carbon monoxide-hydrogenation conditions in which said catalyst comprises an a... | 04/25/1989 |
| 4822825 | Base-modified zeolite-containing catalysts for the conversion of synthesis gas to alcohols A method for preparing a mixture of lower aliphatic alcohols from the reaction of carbon monoxide and hydrogen in the presence of a zeolite-containing heavy metal catalyst under carbon monoxide-hydrogenation conditions in which said catalysts comprises a ... | 04/18/1989 |
| 4820776 | Hydrocarbon compositions containing polyolefin graft polymers having amine and phenothiazine grafted moieties Fuel oils and lubricants of improved properties contain ethylene-propylene copolymers bearing units derived fron N-vinyl pyrrolidone and phenothiazine.... | 04/11/1989 |
| 4816172 | Clear high-performance multifunction VI improvers This invention is a method of producing a clear, high-performance dispersant/antioxidant VII. The method comprising admixing a polar modifier to a VI improver during preparation process or to final product at a sufficiently high temperature to produce the... | 03/28/1989 |
| 4814492 | Method of preparing alkyl acrylates A method for producing alkyl acrylates by reacting ethylene, CO, O2 and an alkanol in the presence of a PdCl2 /CuCl2 catalyst to produce an alkyl propionate which is passed over a base-treated zeolite catalyst to produce t... | 03/21/1989 |
| 4812261 | Lubricating oil containing viscosity index improver Lubricating oil of improved dispersancy and anti-oxidancy contains an ethylene-propylene copolymer onto which has been graft polymerized allyl glycidyl ether, the graft polymer having been thereafter functionalized with (i) N-vinyl pyrrolidone and (ii) a ... | 03/14/1989 |
