Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 4960519 | Membrane process for separation of organic liquids A mixture of alcohol, such as methanol, and organic oxygenate, such as dimethyl carbonate, is treated to recover product of decreased methanol content by pervaporation across a composite membrane of a polyvinyl alcohol and a polyacrylic acid on a polyacry... | 10/02/1990 |
| 4954272 | Process for preparing overbased calcium sulfonates A process for producing an overbased oil soluble calcium sulfonate having a TBN of 325, said process comprising: (a) diluting a neutral calcium sulfonate with a hydrocarbon solvent and a lower alkanol; (b) adding to the diluted calcium sulfonate solution, CaO,... | 09/04/1990 |
| 4834546 | Process for mixing batches of a fluid medium and apparatus therefor The invention is directed to a method of and a system for mixing batches of a flowable medium, especially of hydrocarbons used as base materials for said media and of additives to be admixed thereto. In the mixing operation, the base materials and optiona... | 05/30/1989 |
| 4831197 | Process for the continuous production of lower aliphatic alcohols An improved process for the production of lower aliphatic alcohols by the catalytic hydration of a lower aliphatic olefin in the presence of a strongly acidic cation exchange resin catalyst in a fixed bed reactor and in which a cationic surfactant has bee... | 05/16/1989 |
| 4478278 | Spacer for deep wells A spacer for use in a deep well that is to have a submersible pump situated downhole and with a string of tubing attached to the pump for delivering the pumped fluid. The pump is electrically driven, and power is supplied via an armored cable which parall... | 10/23/1984 |
| 4454420 | Neutron-inelastic gamma radiation well logging method and apparatus with background radiation accounted for Methods and apparatus are provided for making improved pulsed neutron derived measurements of the carbon: oxygen ratio in subsurface earth formations. Plural radiation measurements are made as a function of time from the initiation of the neutron pulse to... | 06/12/1984 |
| 4448822 | Apparatus and method for the production of gas filters An apparatus for coating a substrate with an alumina hydrate film includes a coating vessel having at least one support therein; the substrate to be coated is mounted on the support; and at least one porous or perforated container for holding aluminum met... | 05/15/1984 |
| 4446057 | Apparatus and method for the manufacture of gas filters An apparatus and method for coating at least one substrate with an alumina hydrate film includes a coating vessel for containing a caustic coating solution, and at least one support within the coating vessel upon which are mounted substrates and porous co... | 05/01/1984 |
| 4446010 | Fluid catalytic cracking A fluid catalytic cracking process for sulfur-containing petroleum charge stocks wherein sulfur contained in coke deposited on the fluidized cracking catalyst in the reactor is converted to sulfur oxides in the regenerator and removed from regenerator off... | 05/01/1984 |
| 4445907 | Alcohol composition stabilized against corrosion by the use of an amino tetrazole Alcohols may be inhibited against corrosion by addition there to of an amide reaction product of (i) ##STR1## (preferably in the form of the acid, acid chloride or ester) and (ii) an amino tetrazole.... | 05/01/1984 |
| 4442222 | Adsorbent for separation of para-xylene Para-xylene may be separated as extract product by contacting charge C-8 aromatic hydrocarbon mixture with a synthetic crystalline barium or barium/potassium aluminosilicate zeolite HP, formed by ion exchange from a sodium aluminosilicate zeolite HP havin... | 04/10/1984 |
| 4442024 | Catalyst and method of making the same A method of forming a catalytic article includes the steps of contacting a substrate with a coating solution of an alkali aluminate for a period of time sufficient to form a film of alumina on the substrate; forming a slurry of a catalytic material, a par... | 04/10/1984 |
| 4439612 | Preparation for use as lube oil additives of thioureas containing N-polyalkyleneamino hydrocarbyl succinimido groups Disclosed are the preparation and use of thioureas derived from hydrocarbyl succinimides which have the formula: ##STR1## wherein R is a hydrocarbyl succinimide residue or hydrogen, with the proviso that only one R can be hydrogen. These thioureas of... | 03/27/1984 |
| 4438219 | Alumina catalyst stable at high temperatures An alumina catalyst, which has a desired porosity and surface area and is stable at high temperatures is formed by contacting a substrate with an alkali aluminate solution for a period of time sufficient to form an adherent film of hydrated alumina on the... | 03/20/1984 |
| 4435299 | Preparation of high dropping point lithium complex soap grease A high temperature multipurpose grease is prepared from the lithium soap of a C12 to C24 hydroxy fatty acid, (e.g. 12-hydroxy stearic acid) and a dilithium soap of a C4 to C12 dicarboxylic acid, (e.g. dilithium ... | 03/06/1984 |
| 4435186 | Alcohol fuels containing wear-inhibiting amounts of reaction products of amines and phosphate esters of phosphonic acids A novel fuel composition contains ethanol or gasohol plus, as a wear-inhibiting additive, a quaternary ammonium reaction product of an amine ##STR1## typically bis(2-hydroxyethyl)cocoamine and a phosphate, or phosphonic acid, typically dilauryl ... | 03/06/1984 |
| 4434071 | 1,3-Dibromo dialkylhydantoin and olefin oligomer reaction product as a catalyst for preparing alkenyl dicarboxylic acid anhydride Reaction of maleic acid anhydride and polyisobutylene is improved by use, as catalyst, of a complex of polyisobutylene and a 1,3-dibromo dialkylhydantoin.... | 02/28/1984 |
| 4434054 | Filter for separating discrete solid elements from a fluid stream A filter element which is physically capable of withstanding adverse operating conditions in a subterranean environment. The filter element comprises a durable, yet fluid pervious casing through which a particulate carrying fluid is radially passed after ... | 02/28/1984 |
| 4433977 | Situ process for making multifunctional fuel additives Disclosed is an in situ or "one pot" process for making a fuel additive comprising reacting an excess of at least one N-primary alkylalkylene diamine with maleic anhydride in the presence of from 20 to 36 weight percent of a mineral oil reaction diluent a... | 02/28/1984 |
| 4431825 | Preparation of alkenyl succinic anhydrides Products typified by alkenyl-substituted succinic acid anhydrides are prepared by reacting olefin oligomers with anhydrides of unsaturated aliphatic polycarboxylic acids in the presence of ferric chloride, ferric bromide, stannic chloride, or phosphoric a... | 02/14/1984 |
| 4431790 | Curing agents for polyurethane and process using same Disclosed are novel curing agents for polyurethanes comprising reaction products of (1) a polyoxy alkylenepolyamine with (2) an alpha-substituted acrylic acid derivative wherein the substituent has a terminal hydroxyl group or (3) with a compound having a... | 02/14/1984 |
| 4431430 | Composition containing a water soluble alcohol and a corrosion inhibiting additive Alcohols may be inhibited against corrosion by addition thereto of an alkenyl-substituted aliphatic dicarboxylic acid.... | 02/14/1984 |
| 4431053 | Well drilling tool A special tool for use in fishing operations during well drilling when a so-called string shot is used. The tool is made up of a hollow sub that may be connected into a string of pipe for lowering in the well. And, it includes a sliding sleeve in the sub.... | 02/14/1984 |
| 4429273 | Oil-water monitor An oil-water monitor includes a test cell having a production stream passing through it, thereby allowing the dielectric properties of the production stream to be monitored. An analyzer connected to the measuring cell provides an indication of the water c... | 01/31/1984 |
| 4428850 | Low foaming railway diesel engine lubricating oil compositions A low foaming lubricating oil composition comprising a mineral oil, an oil soluble detergent-like additive which increases the foaming tendency of the lubricating oil, and an effective amount of an estolide of a hydroxy fatty acid having 10 to 24 carbon a... | 01/31/1984 |
| 4428848 | Molybdenum derivatives and lubricants containing same Disclosed are novel compounds prepared by the reaction of an adduct of a phosphosulfurized polyisoalkylene or alpha olefin with an acidified hexavalent molybdenum salt which give enhanced copper corrosion protection relative to the non-molybdenum treated ... | 01/31/1984 |
| 4428822 | Fluid catalytic cracking A method for maintaining a desired catalyst regeneration temperature in a fluid catalytic cracking unit operating with complete combustion of coke to carbon dioxide when the coke content of the spent catalyst supplied to the regeneration zone from the rea... | 01/31/1984 |
| 4427941 | Temperature compensated well logging tool A well logging tool adapted for use in a borehole traversing an earth formation includes at least one sensor sensing at least one characteristic of the earth formation. Another sensor senses the ambient temperature and provides a corresponding temperature... | 01/24/1984 |
| 4427559 | Method of preparing overbased calcium sulfonates In the preparation of overbased calcium sulfonates the use of a mixture of calcium oxide and calcium hydroxide wherein the mole ratio CaO/CaOH2 +Ca(OH)2 ranges from 0.2 to 1.0 improves lime and sulfonate utilization and reduces the a... | 01/24/1984 |
| 4427091 | Fail-safe circuit mechanism for generating a pulse indicating the precise moment of firing of a gas exhausting gun A new circuit is added to the old electrical circuit including two electrodes underwater positioned very close to a gas exhausting gun gaseous exhaust such as an air gun, wherein the exhaust from the firing gas exhausting gun momentarily blows away the co... | 01/24/1984 |
| 4423783 | Method for plugging a well and bridge plug A method for plugging a well comprises (1) extending two sets of dogs on a bridge plug for engaging the sides of the well by releasing an expandable means, and (2) releasing a high pressure fluid for triggering and releasing the expandable means for exten... | 01/03/1984 |
| 4422925 | Catalytic cracking A fluid catalytic cracking process and apparatus in which a plurality of hydrocarbon feedstocks including at least one normally gaseous paraffinic hydrocarbon feedstock and at least one normally liquid hydrocarbon feedstock are subjected to cracking react... | 12/27/1983 |
| 4422923 | Process for recovering solvents from solvent-containing hydrocarbon phases in hydrocarbon raffination systems Recovery of solvent from hydrocarbon oil extract fractions comprising solvent and oil is effected in at least three sequential flash vaporization stages wherein the pressure of the second vaporization stage is at the highest pressure level and the pressur... | 12/27/1983 |
| 4421675 | Process A novel catalyst, possessing phase transfer properties contains an alumina or silica substrate bearing at least one poly(oxyethylene) or poly(oxypropylene) residue bonded through an oxygen atom to the substrate.... | 12/20/1983 |
| 4419394 | Catalyst and method of making the same A coating solution, useful in the process of coating a substrate with an alumina film, can be formed by adding to an alkali aluminate solution a sufficient quantity of an alumina gel which is a precipitate formed by the reaction of aluminum sulfate with a... | 12/06/1983 |
| 4419255 | Lubricating oil containing keto amide as friction reducing agent Lubricating oil characterized by improved friction reduction contains friction reducing amounts of a keto amide prepared by the reaction of an amine and an unsaturated cyclic keto acid bearing pendant alkyl groups.... | 12/06/1983 |
| 4419227 | Recovery of solvent from a hydrocarbon extract A lubricating oil solvent refining process employing N-methyl-2-pyrrolidone as solvent in which solvent is recovered from a solvent-oil mixture in a staged series of vaporization zones at progressively increasing pressure with external heat supplied only ... | 12/06/1983 |
| 4419105 | Maleic anhydride-amine reaction product corrosion inhibitor for alcohols Alcohols may be inhibited against corrosion by addition thereto of a reaction product of a maleic anhydride and certain amines typified by alkyl isopropoxy aminopropyl amines.... | 12/06/1983 |
| 4418574 | Magnetic method and apparatus for measuring wall thickness A pulsed magnetic procedure and apparatus for measuring wall thickness. It is especially applicable to pipelines. It includes pulsing a magnetic reluctance coil that is located close to the wall, and measuring the inductance of the pulsed coil. Also the d... | 12/06/1983 |
| 4416996 | Hydrogen blistering corrosivity metering means and method A hydrogen blistering corrosivity meter includes a cavity filled with a monitoring liquid. A liquid to be tested is separated from the monitoring liquid by a steel membrane. A device, which allows the volume of the measuring liquid to be monitored, is con... | 11/22/1983 |
