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| Number | Title | Issue Date |
| 7129297 | Polystyrene blends and a method of making same Disclosed are blends of polystyrene and at least one of syndiotactic polypropylene, ethylene propylene copolymers, and styrene-butadiene-styrene triblock copolymers. These blends are prepared using solution polymerization and have unique morphologies and desirable p... | 10/31/2006 |
| 7041733 | Controlling particle size in HIPS using metal carboxylates It has been discovered that certain compounds serve as particle size regulators when employed together with peroxide initiators for the polymerization of vinylaromatic monomers in the presence of diene polymers. Suitable compounds that can control particle size incl... | 05/09/2006 |
| 7022796 | Production of ultra high melt flow polypropylene resins A method of preparing ultra high melt flow polypropylene having reduced xylene solubles is provided. The method utilizes a diether internal donor-containing Ziegler-Natta catalyst system to polymerize propylene. The polypropylene produced is characterized by having ... | 04/04/2006 |
| 6972311 | Optimizing polystyrene in the presence of additives It has been discovered that improved polystyrene products may be obtained by polymerizing styrene in the presence of at least one multifunctional initiator, at least one chain transfer agent, and at least one cross-linking agent. The presence of the multifunctional ... | 12/06/2005 |
| 6972047 | Incorporation of gilsonite into asphalt compositions It has been discovered that a synthetic flux oil can contain and deliver asphaltites, such as gilsonite, more easily and readily to an asphalt to improve its properties. The synthetic flux oil includes the asphaltite and a carrier oil. Depending on the nature of the... | 12/06/2005 |
| 6864399 | Silica-supported alkylation catalyst The alkylation of benzene-containing feedstock over a zeolite beta alkylation catalyst which is formulated with a silica binder and has an average regeneration coefficient of at least 95% for at least three regenerations. The alkylation reaction is carried out in th... | 03/08/2005 |
| 6864331 | Process for the production of polymers Disclosed is a process for preparing a polymer. The process includes at least one process stream and the process stream has at least one characteristic of interest. The process further includes passing the process stream past a sensor probe connected to a near-IR sp... | 03/08/2005 |
| 6864207 | Ziegler-Natta catalyst for polyolefins A process for making a polyolefin catalyst component, catalyst and polymer resin is disclosed. Controlling the viscosity of a catalyst synthesis solution with the addition of aluminum alkyl alters the precipitation of the catalyst component from a catalyst synthesis... | 03/08/2005 |
| 6693848 | Apparatus for microchip laser geo-sensors An optical geophone or hydrophone for detecting seismic vibrational energy comprising a laser material, which generates a lasing frequency signal, the frequency of which varies in accordance with vibrational energy incident upon the laser material, a ligh... | 02/17/2004 |
| 6687619 | Method of using cascaded sweeps for source coding and harmonic cancellation A method of seismic surveying using one or more vibrational seismic energy sources activated by sweep signals. The highest order harmonic that has sufficient strength to cause significant harmonic distortion of a sweep segment is determined. A number of s... | 02/03/2004 |
| 6643590 | Method for computing finite-frequency seismic migration traveltimes from monochromatic wavefields A method for determination of seismic wave travel times from a surface location to at least one subsurface computation point (CP) within a plurality of subsurface location points. A velocity model of a region is defined. A complex monochromatic wavefield ... | 11/04/2003 |
| 6629037 | Optimal paths for marine data collection A method for finding an optimal path in seismic in fill shooting using a neural network to estimate cable feathering and uses multiple off set cost maps and potentials in cellular automata. The process determines cable coordinates at each cell location an... | 09/30/2003 |
| 6502037 | Method for gravity and magnetic data inversion using vector and tensor data with seismic imaging and geopressure prediction for oil, gas and mineral exploration and production A method for modeling geological structures includes obtaining seismic data and using these data to derive an initial density model. Potential fields data is used to update the initial geophysical model by an inversion process using vector or tensor compo... | 12/31/2002 |
| 6424918 | Method for integrating gravity and magnetic inversion data with model based seismic data for oil, gas and mineral exploration and production A method for modeling geological structures beneath anomalous density zones includes receiving seismic data and using this data to derive the top of a geologic model. Non-seismic data, such as gravity or magnetic data are used to derive the lower boundary... | 07/23/2002 |
| 6278948 | Method for gravity and magnetic data inversion using vector and tensor data A method for modeling geological zones having anomalous density includes determining the top of the anomalous zone from non-potential fields data. Potential fields data is then used to derive the lower boundary of the geologic anomalous zone. A lower boun... | 08/21/2001 |
| 6219619 | Inhomogeneous background-based software focusing method for array-type induction logging tools A method of focusing the measurements from an array type induction logging tool using an inhomogeneous background rather than a homogeneous background. A modeled inhomogeneous background response can be separated from the measured response and focused dir... | 04/17/2001 |
| 6154704 | Method for correcting well log data for effects of changes in instrument velocity cable yo-yo A method for correcting data measured by a well logging instrument for effects of cable yo-yo. The data are first preprocessed to reduce magnitude of spatial frequency components in the data occurring within a bandwidth of axial acceleration of the loggin... | 11/28/2000 |
| 6124590 | Method for determining thermal neutron capture cross-section of earth formations using measurements from multiple capture gamma ray detectors A method for determining thermal neutron capture cross-section of an earth formation penetrated by a wellbore from counts of capture gamma rays detected at spaced apart locations from a source irradiating the formations with bursts of high energy neutrons... | 09/26/2000 |
| 6095258 | Pressure actuated safety switch for oil well perforating A perforating gun assembly for perforating wellbores, comprising a shaped charge carrier assembly, a detonating cord for initiation OF shaped charges in the carrier assembly, an initiator attached to the detonating cord for initiating the cord on applicat... | 08/01/2000 |
| 6069479 | Permanent magnet material composition and structure for eddy current suppression in a nuclear magnetic resonance sensing apparatus A nuclear magnetic resonance well logging apparatus, comprising an antenna for inducing a radio frequency magnetic field in earth formations surrounding the apparatus and for detecting nuclear magnetic resonance signals from the earth formations; and a ma... | 05/30/2000 |
| 6062315 | Downhole tool motor An apparatus and method for transporting a downhole tool in a borehole. A phase change material such as a shape memory metal is activated to engage the borehole and to transport the tool through the borehole. After the tool has been advanced in the boreho... | 05/16/2000 |
| 6060662 | Fiber optic well logging cable A well logging cable including an optical fiber and a pressure sealed enclosure surrounding the fiber. The enclosure is adapted to be able to be elongated to the maximum expected axial strain on the logging cable without permanent deformation. In one embo... | 05/09/2000 |
