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| Number | Title | Issue Date |
| 7751941 | Method and apparatus for monitoring polyolefin production The present technique provides for the use of spectroscopic probes, such as Raman probes, within the conduits or other equipment of a polyolefin production system and upstream systems. The Raman probe or other spectroscopic probes may be used to obtain spectroscopic... | 07/06/2010 |
| 7433761 | Method and apparatus for monitoring polyolefin production The present technique provides for the use of spectroscopic probes, such as Raman probes, within the conduits of a polyolefin production system. The Raman probe or other spectroscopic probes may be used to obtain spectroscopic measurements of the contents of the con... | 10/07/2008 |
| 7417095 | Method and apparatus for monitoring polyolefin production The present technique provides for the use of spectroscopic probes, such as Raman probes, within the conduits of a polyolefin production system. The Raman probe or other spectroscopic probes may be used to obtain spectroscopic measurements of the contents of the con... | 08/26/2008 |
| 7402635 | Process for preparing polyethylene Disclosed is process for producing polyethylene using a slurry loop reactor. The process includes using a mathematical model to predict a plurality of process control parameters based on the desired product properties and reactor characteristics and controlling the ... | 07/22/2008 |
| 7400941 | Method and apparatus for monitoring polyolefin production The present technique provides for the use of spectroscopic probes, such as Raman probes, within the conduits of a polyolefin production system. The Raman probe or other spectroscopic probes may be used to obtain spectroscopic measurements of the contents of the con... | 07/15/2008 |
| 7343225 | Method for reducing off-grade product production during reaction transitions In some embodiments, a method for determining initial conditions for a transition from an initial reaction to a target reaction to minimize (or substantially minimize) the amount of off-grade material produced during the transition, and optionally also process contr... | 03/11/2008 |
| 7329712 | Swell control in slurry loop reactor The present invention discloses a method for controlling the onset and development of swelling in a slurry loop reactor by progressively diluting the reactor, the amount of dilution being driven by the amplitude of the fluctuations measured on some plant measurement... | 02/12/2008 |
| 7319040 | Process control using on-line instrumentation and process models A method for providing improved estimates of properties of a chemical manufacturing process is disclosed. The method employs a process model that includes, or is modified by, scores or other gains obtained from the mathematical transformation of data obtained from a... | 01/15/2008 |
| 7314322 | Printing system that corrects image data based on environmental history data A printing system according to the present invention includes a media terminal box which may be installed on a street. In the box, there are disposed a measuring device that measures the temperature or humidity in the box, a device such as a CPU, and a storage devic... | 01/01/2008 |
| 7272544 | Integrated modeling through symbolic manipulation Integrated modeling and symbolic manipulation is leveraged for the derivation, construction, maintenance, and reuse of application-independent models. Related models created for different applications share a common ancestry and maintain model consistency while enab... | 09/18/2007 |
| 7242473 | Particle size distribution analyzer An data processing system 4 includes: an integral part 43 which integrates, by two mutually different times, light intensities indicating light intensity signals outputted from light detectors 24 respectively provided for detecting intensities o... | 07/10/2007 |
| 7238517 | Thermal cycler for automatic performance of the polymerase chain reaction with close temperature control An instrument for performing highly accurate PCR employing a sample block in microtiter tray format. The sample block has local balance and local symmetry. A three zone film heater controlled by a computer and ramp cooling solenoid valves also controlled by the comp... | 07/03/2007 |
| 7226789 | Method of applying non-linear dynamics to control a gas-phase polyethylene reactor operability The present invention describes a method for determining reactor continuity of a polymerization reactor by non-linear dynamics. Specifically, the invention relates to a method of analyzing system variables to indicate gas phase reactor continuity in real-time and co... | 06/05/2007 |
| 7191037 | Method for controlling production process A method for controlling production process by performing near-infrared absorptiometric analysis by simple procedures in an accurate manner, in which control of production process step can be realized at a high accuracy by simple operation based on the thereby obtai... | 03/13/2007 |
| 7187990 | Process controlling method with merged two-control loops The architecture of the controller of the present invention is mainly composed of three portions, which are a model predictive controller, a local controller (also called stably assistant controller), and a coordinator. This modified model predictive control structu... | 03/06/2007 |
| 7142140 | Auto scanning ADC for DPWM A system for monitoring interrupts to a processor includes a multiplexer having a plurality of inputs connected to receive various analog inputs. The multiplexer further has an output which is programmably connected to one of the plurality of inputs responsive to a ... | 11/28/2006 |
| 7133784 | Process and method for chemical manufacturing using transformation of on-line instrumentation data A method for providing improved estimates of properties of a chemical manufacturing process is disclosed. The method regesses process variables with scores or other gains obtained from the mathematical transformation of data obtained from an on-line analyzer. Chemic... | 11/07/2006 |
| 7122799 | LED or laser enabled real-time PCR system and spectrophotometer A system for conducting a polymerase chain reaction (PCR) assay upon a collection of samples is disclosed. The PCR assay is performed by absorption detection. The system includes a multi-well plate which is adapted to retain a collection of sample wells. This system... | 10/17/2006 |
| 7116414 | On-line measurement and control of polymer properties by raman spectroscopy Methods are provided for determining and controlling polymer properties on-line in a polymerization reactor system, such as a fluidized bed reactor. The methods include obtaining a regression model for determining a polymer property, the regression model including p... | 10/03/2006 |
| 7109495 | Fluorometer with low heat-generating light source This invention concerns a fluorometer preferably combined with a thermal cycler useful in biochemical protocols such as polymerase chain reaction (PCR) and DNA melting curve analysis. The present fluorometer features a low heat-generating light source such as a ligh... | 09/19/2006 |
| 7106437 | On-line measurement and control of polymer product properties by Raman spectroscopy Methods are provided for determining and controlling polymer product properties on-line in a slurry reactor system, such as a stirred slurry or slurry loop reactor. The methods include obtaining a regression model for determining a polymer product property, the regr... | 09/12/2006 |
| 7024313 | Method of estimating the properties of a polymer product The present invention relates to a method of estimating the properties of a polymer product by using converted process variables (cPV's) which means process variable that final or intermediate product experienced earlier in average in the reactors by stage with resp... | 04/04/2006 |
| 7003971 | Electronic component cooling system for an air-cooled chiller A chiller system includes a refrigerant loop, the refrigerant loop further including a compressor, an air-cooled condenser arrangement and an evaporator arrangement connected in a first closed refrigerant loop. A motor is connected to the compressor to drive the com... | 02/28/2006 |
| 6995233 | Process for manufacturing polyamides The invention relates to a continuous process for manufacturing polyamides. The polyamides are of the type obtained from diacids and diamines. The process comprises an operation of continuous mixing of a compound which is rich in amine end groups and a compound whic... | 02/07/2006 |
| 6996550 | Methods and apparatus for preparing high-dimensional combinatorial experiments Computer-implemented methods, systems and apparatus, including computer program apparatus, provide techniques for designing a set of experiments to be performed with a set of resources. A plurality of experimental configurations are generated based on a set of param... | 02/07/2006 |
| 6988022 | Method for online estimation of reactor split for multimodal polyolefins The present method is directed to techniques for estimating and periodically controlling the reactor split of alpha-olefin polymerizations using multiple catalysts that selectively incorporate monomers and other reactants into polymer compositions. The method provid... | 01/17/2006 |
| 6964753 | Polymerization reactor and process A continuous static polymerization reactor unit for the production of liquid polymers, in particular high viscosity organopolysiloxanes, in a predetermined viscosity range comprises a reactor (1) a supply means (10,25) for supplying monomers and/or oli... | 11/15/2005 |
| 6954681 | Board align image acquisition device with improved interface An electronics assembly system includes an image acquisition system that is coupled to a controller through an improved interface. The coupling facilitates advanced monitoring and control of the image acquisition system. Multiple image acquisition systems can be cou... | 10/11/2005 |
| 6727096 | Analysis and control of parallel chemical reactions Computer programs and computer-implemented methods for monitoring the progress and properties of parallel chemical reactions. The invention repeatedly receives a measured value or values associated with the contents of each of a plurality of reactor vessels and disp... | 04/27/2004 |
| 6718234 | System for on line inference of physical and chemical properties and system for on line A system for on line inference and control of physical and chemical properties of polypropylene and its copolymers is described. The system comprises models for the inference of physical and chemical properties that are not continuously measured and relevant models ... | 04/06/2004 |
| 6590131 | Method for control of a chemical manufacturing process A method for monitoring and improving the performance of a chemical manufacturing process by monitoring transients associated with the operation of process equipment located dowstream of upstream equipment is disclosed. Transients on signals such as the m... | 07/08/2003 |
| 6549864 | Multivariate statistical process analysis systems and methods for the production of melt polycarbonate Computerized process control systems and methods for the production of melt polycarbonate include a plurality of sensors for obtaining a plurality of measurements relating to a plurality of predetermined process variables, a preprocessor for preprocessing... | 04/15/2003 |
| 6489168 | Analysis and control of parallel chemical reactions Computer programs and computer-implemented methods for monitoring the progress and properties of parallel chemical reactions. The invention repeatedly receives a measured value or values associated with the contents of each of a plurality of reactor vesse... | 12/03/2002 |
| 6327521 | Process control method for vented polymerizers A method for controlling the properties of the product polymer of a polymerization process to improve the process productivity and product quality in both batch and continuous production of polyamides.... | 12/04/2001 |
| 6278899 | Method for on-line optimization of a plant An on-line optimizer is comprised of a nonlinear dynamic model (702) which is operable to provide an estimation of the output of a plant. This receives manipulated variables (MV), disturbance variables (DV), and computed disturbance variables (CDB). The e... | 08/21/2001 |
| 6212436 | Dynamic inheritance of software object services Object services like methods or properties are provided to or inherited by objects dynamically during run-time. In one method of providing dynamic inheritance, hierarchical relationships are defined between multiple objects such that each object reference... | 04/03/2001 |
| 6144897 | Control method for processes of synthesis of chemical products A control method for a process of synthesis of at least one chemical product in an equipment comprising at least one reactor (R) which is assimilated to a mixed reactor, in which manipulated variables (GC) allow to act on the course of the process in orde... | 11/07/2000 |
| 6093211 | Polymer property distribution functions methodology and simulators A process simulator and modeling methodology employs instantaneous property measures. The instantaneous measures of various polymer properties are tracked throughout the subject polymer manufacturing system and used to calculate respective property distri... | 07/25/2000 |
| 5687090 | Polymer component characterization method and process simulation apparatus A flexible method for characterizing polymer components and the use of the same in general purpose polymer process simulation software has been developed. In this method and software apparatus, polymer molecules are defined in terms of their segments or s... | 11/11/1997 |
| 5602756 | Thermal cycler for automatic performance of the polymerase chain reaction with close temperature control An instrument for performing highly accurate PCR employing a sample block in microtiter tray format. The sample block has local balance and local symmetry. A three zone film heater controlled by a computer and ramp cooling solenoid valves also controlled ... | 02/11/1997 |
