Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7807379 | Tissue inhibitor of matrix metalloproteinases type-1 (TIMP-1) as a cancer marker The present invention describes a method for determining whether an individual is likely to suffer from cancer by determining a parameter representing the TIMP-1 concentration in body fluid samples from the individual. ... | 10/05/2010 |
| 7667550 | Differential oscillator device with pulsed power supply, and related driving method The present invention concerns a differential oscillator device, comprising resonant electronic means, capable to provide on at least two terminals at least one oscillating signal VOUT, which comprises a generator electronic means capable to supply at lea... | 02/23/2010 |
| 7564304 | Audio power amplifier apparatus The invention concerns an audio power amplifier apparatus capable of providing at low manufacturing cost extremely low non-linear distortion, even lower than −120 dB, comprising a main power amplifying section the output of which is series connected to a secondary... | 07/21/2009 |
| 7542261 | Device for driving and electromagnet, particularly for operating pumps A device for driving an electromagnet, for operating pumps, including a primary winding and a moving element, power switching electronic means, a control logic unit to control the power switching electronic means and to detect a value of an excitation current. A pow... | 06/02/2009 |
| 7520197 | Roofing material removal device A material removing device for removing materials from a surface includes a body having a handle assembly with a recoil mechanism and a driver slidably mounted to the body. A blade with a slotted edge is removably connected to the driver. An actuator mounted to the ... | 04/21/2009 |
| 7517913 | Polyamine conjugates with acidic retinoids and preparation thereof Invented are novel polyamine conjugates which have been readily obtained using as key-step the condensation of linear, conformationally restricted, cyclic and branched polyamines or suitably protected derivatives with vitamin A derivatives. These compounds inhibit t... | 04/14/2009 |
| 7515273 | Method for measuring the brillouin shift distribution along an optical fiber based on the optical demodulation of the signals, and relevant apparatus The invention concerns a method for measuring the Brillouin shift distribution in optical fiber, comprising the launch of an optical pump signal from one end of the measurement fiber and an optical probe signal from the other end of the fiber, including: measuring f... | 04/07/2009 |
| 4871814 | High impact, highly transparent linear styrene-diene block copolymers with five or more blocks and their preparations by anionic dispersion polymerization High molecular weight linear block copolymers containing 5 or more alternating blocks of (A) polymerized styrene or alkyl substituted styrene units, and (B) polymerized conjugated diene units, terminated by (A) units, are prepared by anionic dispersion po... | 10/03/1989 |
| 4865697 | Flashing feed inlet in a vapor/liquid contacting tower and method A flashing feed inlet device is used in a vapor/liquid contacting column, such as a distillation column, to decrease the amount of liquid entrainment and maldistribution of vapor occurring when the liquid feed stream is introduced into the column at a tem... | 09/12/1989 |
| 4866021 | Catalyst composition for preparing high density, broad molecular weight distribution alpha-olefin polymers Broad molecular weight distribution, and high molecular weight olefin polymers, are prepared by polymerizing at least one olefin in the presence of a vanadium - and a titanium-containing catalyst composition. A catalyst precursor is synthesized by contact... | 09/12/1989 |
| 4863886 | Magnesium oxide-supported ziegler catalyst modified with acid and higher alkanol, and process for preparing narrow MWD HDPE MgO treated with an organic acid, e.g., 2-ethyoxybenzoic acid, is used as a support for an Al-Ti Ziegler catalyst in which the Ti component is the product of an alkanol having 5 to 12 carbon atoms and TiCl4 to give HDPE with narrow MWD and larg... | 09/05/1989 |
| 4859717 | Cross-linked polyvinyl alcohols and oil reservoir permeability control therewith A novel cross-linked polymer is obtained by cross-linking polyvinyl alcohol with a cross-linking agent which is a mixture of a phenolic component and an aldehyde or a mixture of a naphtholic component and an aldehyde. The resulting polymer is exceptionall... | 08/22/1989 |
| 4854385 | Oil recovery process utilizing gravitational forces There is disclosed a method of recovering oil from a subterranean oil formation having the vertical thickness of 40 ft or more. The method exploits the effect of gravity on the various slugs of diverse materials injected into the oil column of the formati... | 08/08/1989 |
| 4855526 | Process for preparing ethylene-higher olefin copolymer oils with Ziegler-Natta catalyst in mixed aliphatic-aromatic solvent Low viscosity copolymers of ethylene and higher olefins are prepared with Ziegler-Natta catalysts in the presence of an aliphatic-aromatic solvent mixture, e.g., 1:1 (by volume) of hexane:toluene. The copolymerization can be conducted without hydrogen and... | 08/08/1989 |
| 4851036 | Mineral ore flotation process and apparatus There is disclosed a process and an apparatus for beneficiating a mineral ore, such as phosphate-containing ore, in a substantially vertical column. The feed subjected to the benefication preferably has a particle size of less than 20 mesh. The feed is in... | 07/25/1989 |
| 4849389 | Catalyst composition for polymerizing alpha-olefin polymers of narrow molecular weight distribution A supported alpha-olefin polymerization catalyst composition is synthesized by reacting (1) a slurry of a solid catalyst carrier in a non-polar solvent, e.g., hexane, with a dialkyl organomagnesium composition; (2) contacting the slurry of step (1) with a... | 07/18/1989 |
| 4834947 | Reactor system for rapid kill gas injection to gas phase polymerization reactors There is provided an improvement in a method for terminating a gas phase olefin polymerization reaction with a kill gas such as carbon monoxide or carbon dioxide. The improvement involves the use of a carrier gas to increase the rate of penetration of kil... | 05/30/1989 |
| 4834182 | Polymers for oil reservoir permeability control Improved polymer gels for oil reservoir permeability control have a continuous, cross-linked polymer phase having a relatively low density of cross-linking with domains of clustered, high density cross-linking. The clustered high density cross-linkings co... | 05/30/1989 |
| 4833111 | Catalyst composition for polymerizing alpha-olefin polymers of narrow molecular weight distribution A supported alpha-olefin polymerization catalyst composition is synthesized by reacting (1) a slurry of a solid catalyst carrier in a non-polar solvent, e.g., hexane, with a dialkyl organomagnesium composition; (2) contacting the slurry of step (1) with a... | 05/23/1989 |
| 4831000 | Catalyst composition for preparing high density or linear low density olefin polymers of controlled molecular weight distribution There is disclosed a catalyst composition for the polymerization of olefins, particularly alpha-olefins. The composition is prepared by synthesizing a catalyst precursor and then combining it with a conventional catalyst activator. The precursor is synthe... | 05/16/1989 |
| 4816432 | Catalyst composition for polymerizing alpha olefins A modified catalyst for polymerizing alpha-olefins, for example, ethylene, is prepared by combining a chromium-compound-comprising catalyst, supported on a refractory oxide support with at least one catalyst modifier of the formula R Mg R' where R and R' ... | 03/28/1989 |
| 4801572 | Modified chromium-containing catalyst composition for polymerizing alpha-olefins and method of preparing same A modified supported catalyst for polymerizing alpha-olefins, for example, ethylene, is prepared by combining a chromium compound-containing catalyst with a modifier which is an oxide of an element of Group II A of the Periodic Chart of the Elements. The ... | 01/31/1989 |
| 4793415 | Method of recovering oil from heavy oil reservoirs A steam flooding method for recovering oil from an underground formation penetrated by an injection and at least one production well is modified by initially lowering the permeability of the lower vertical portion of the formation, e.g., by plugging there... | 12/27/1988 |
| 4786695 | Method and reactor system for rapid kill gas injection to gas phase polymerization reactors There is provided an improvement in a method for terminating a gas phase olefin polymerization reaction with a kill gas such as carbon monoxide or carbon dioxide. The improvement involves the use of a carrier gas to increase the rate of penetration of kil... | 11/22/1988 |
| 4786678 | Method of producing films from polyethylene resin, an additive and a second polymeric resin There is disclosed a modified method of preparing a blown polyethylene film made from a blend of major proportion of a polyethylene resin, e.g., LLDPE, a minor proportion of a second polymeric resin, e.g., polystyrene, and at least one additive, e.g., a c... | 11/22/1988 |
| 4785883 | Polysilicate esters for oil reservoir permeability control The permeability of subterranean oil-bearing formations is controlled by injection of an organic polysilicate ester. The ester may be derived from simple, monohydroxylic alcohols such as methanol, ethanol, propanol or butanol, from diols such as ethylene ... | 11/22/1988 |
| 4784838 | Method of stabilizing solutions of chelated polyvalent metals A cyclic process for removing H2 S from a gaseous stream comprising contacting the gaseous stream with a solution of a chelated polyvalent metal to produce elemental sulfur, removing the elemental sulfur, and regenerating the reaction solution,... | 11/15/1988 |
| 4776398 | Oil reservoir permeability control The permeability of a subterranean oil-bearing formation is controlled by the injection of an aqueous solution of a cross-linked block copolymer containing polar and non-polar segments, with the polar segments generally making up at least 50 percent, usua... | 10/11/1988 |
| 4769429 | Process for polymerizing alpha-olefins A supported solid catalyst composition for polymerizing alpha-olefins is prepared by treating a carrier with a transition metal compound. The carrier utilized in the synthesis must have such an average pore diameter that the resulting catalyst composition... | 09/06/1988 |
| 4766958 | Method of recovering viscous oil from reservoirs with multiple horizontal zones There is disclosed a method of recovering viscous oil from a subterranean viscous oil-containing formation separated into at least one upper and at least one lower zone by a horizontal layer having lower vertical permeability than the rest of the reservoi... | 08/30/1988 |
| 4762737 | Multi-layer non-corrosive plastic film Disclosed is a multi-layer film comprised of at least one high density polyolefin (HDPE) layer, at least one polyamide layer and an HDPE/polyamide adhesion promoting agent. The agent is substantially free of inorganic salt groups and it is a non-ionic pro... | 08/09/1988 |
| 4760121 | Preparation of alpha-olefin polymers of relatively narrow molecular weight distrbution A catalyst composition for polymerizing alpha-olefins is prepared by treating a carrier containing OH groups with a liquid solution containing an excess of an organomagnesium composition with respect to the OH groups and contacting the thus-formed magnesi... | 07/26/1988 |
| 4747983 | Process and apparatus for manufacturing foamed structures with integral skin A foamed thermoplastic article having an integral outer unfoamed skin layer is formed from a mixture of thermoplastic resin containing a blowing agent by removing at least a portion of the blowing agent in the die of the extruder. The blowing agent is rem... | 05/31/1988 |
| 4741399 | Oil recovery process utilizing gravitational forces There is disclosed a method of recovering oil from a subterranean oil formation having the vertical thickness of 40 ft or more. The method exploits the effect of gravity on the various slugs of diverse materials injected into the oil column of the formati... | 05/03/1988 |
| 4738942 | Catalyst composition for polymerizing alpha-olefin polymers of relatively narrow molecular weight distribution and high melt index A catalyst composition for polymerizing alpha-olefins is prepared by treating a carrier with a mixture of at least one organomagnesium composition of the formula where R and R' are the same or different C1 -C12 hydrocarbyl groups, m ... | 04/19/1988 |
| 4736793 | Tall oil as additive in gas drive hydrocarbon oil recovery A gas-drive hydrocarbon oil recovery process comprises injecting into a subterranean, viscous oil-containing formation tall oil to reduce the minimum miscibility pressure (MMP) of the reservoir oil-displacing fluid system and increase the viscosity of the... | 04/12/1988 |
| 4732882 | Catalyst composition for polymerizing alpha-olefins A catalyst composition for polymerizing alpha-olefins is prepared by reacting a transition metal compound, e.g., titanium, with trimethylaluminum catalyst activator. In a preferred embodiment, the catalyst is supported on a porous refractory support and i... | 03/22/1988 |
| 4727122 | Recovery of unreacted monomers in olefin polymerization process There is disclosed a process for recovering olefin monomers, e.g., C3 -C10 alpha-olefins, from a vent gas of a vapor phase process for polymerizing olefins. The method comprises passing the vent gas, obtained by purging a resin produ... | 02/23/1988 |
| 4720604 | Process for dehydrogenation of alkylaromatics Dehydrogenation catalyst compositions for alkylaromatics and dehydrogenation processes using such catalysts are provided. The catalyst compositions comprise a catalytically active iron compound, e.g., iron oxide; a potassium catalyst promoter, e.g., potas... | 01/19/1988 |
| 4677087 | Catalyst composition for polymerizing alpha-olefin polymers of relatively narrow molecular weight distribution A catalyst composition for polymerizing alpha-olefins is prepared by treating a carrier containing OH groups with a liquid solution containing an excess of an organomagnesium composition with respect to the OH groups and contacting the thus-formed magnesi... | 06/30/1987 |
