Patents by Inventor Ivan J. Hartley
Ivan J. Hartley has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 8862438Abstract: A method for improving the prediction of polymer properties and a system having improved polymer property prediction capabilities is provided. The method for improving the prediction of polymer properties comprises: (1) providing a polymer; (2) providing a prediction model; (3) utilizing said prediction model to define an average polymer property prediction value; (4) determining a feasible range; (5) measuring one or more properties of said polymer; (6) determining whether said one or measured polymer properties are within said feasible range: (7) validating said one or more measured polymer properties if said one or more measured polymer properties fall within the feasible range or invalidating said one or more measured polymer properties if said one or more measured polymer properties fall outside of the feasible range; (8) optionally updating said prediction model; (9) repeating said previous steps at least one or more times; and (10) thereby improving the prediction of polymer properties.Type: GrantFiled: July 24, 2008Date of Patent: October 14, 2014Assignee: Dow Global Technologies LLCInventors: Jeffrey B. Drabish, John R. Parrish, Marcel Schaefer, Ivan J. Hartley, Paul K. Samples, Mark L. Nelson
-
Patent number: 8742035Abstract: Embodiments of the invention provide a method of controlling a gas-phase polymerization process. The method includes determining a difference between a control variable of the polymerization process, such as the production rate, and the desired value of the control variable; adjusting or maintaining a first manipulated variable to at least partially compensate for the difference between the control variable and the desired value; and adjusting or maintaining a second manipulated variable to at least partially compensate for the effect of adjusting or maintaining the first manipulated variable.Type: GrantFiled: December 12, 2012Date of Patent: June 3, 2014Assignee: Dow Global Technologies LLCInventors: Paul K. Samples, John R. Parrish, Ivan J. Hartley, Jeffrey B. Drabish
-
Patent number: 8354481Abstract: The present invention provides methods of controlling a gas-phase polymerization process. The method includes determining a difference between a control variable of the polymerization process, such as the production rate, and the desired value of the control variable; adjusting or maintaining a first manipulated variable to at least partially compensate for the difference between the control variable and the desired value; and adjusting or maintaining a second manipulated variable to at least partially compensate for the effect of adjusting or maintaining the first manipulated variable. The first and second manipulated variables can include process variables such as the fluidized bed weight, the catalyst concentration, the concentration of one or more monomers, the flow of one or more comonomers, the ratio of one comonomer to another comonomer, the activator concentration, the ratio of an activator to selectivity control agent, the concentration of a chain transfer agent, and the retardant concentration.Type: GrantFiled: December 9, 2011Date of Patent: January 15, 2013Assignee: Dow Global Technologies LLCInventors: Paul K. Samples, John R. Parrish, Ivan J. Hartley, Jeffrey B. Drabish
-
Publication number: 20120136482Abstract: The present invention provides methods of controlling a gas-phase polymerization process. The method includes determining a difference between a control variable of the polymerization process, such as the production rate, and the desired value of the control variable; adjusting or maintaining a first manipulated variable to at least partially compensate for the difference between the control variable and the desired value; and adjusting or maintaining a second manipulated variable to at least partially compensate for the effect of adjusting or maintaining the first manipulated variable. The first and second manipulated variables can include process variables such as the fluidized bed weight, the catalyst concentration, the concentration of one or more monomers, the flow of one or more comonomers, the ratio of one comonomer to another comonomer, the activator concentration, the ratio of an activator to selectivity control agent, the concentration of a chain transfer agent, and the retardant concentration.Type: ApplicationFiled: December 9, 2011Publication date: May 31, 2012Applicant: Dow Global Technologies LLCInventors: Paul K. Samples, John R. Parrish, Ivan J. Hartley, Jeffrey B. Brabish
-
Patent number: 8093341Abstract: Embodiments of the invention provide a method of controlling a gas-phase polymerization process. The method includes determining a difference between a control variable of the polymerization process, such as the production rate, and the desired value of the control variable; adjusting or maintaining a first manipulated variable to at least partially compensate for the difference between the control variable and the desired value; and adjusting or maintaining a second manipulated variable to at least partially compensate for the effect of adjusting or maintaining the first manipulated variable.Type: GrantFiled: October 18, 2005Date of Patent: January 10, 2012Assignee: Dow Global Technologies LLCInventors: John R. Parrish, Paul K. Samples, Ivan J. Hartley, Jeffrey Brian Drabish
-
Publication number: 20100209307Abstract: The instant invention is a method for improving the prediction of polymer properties and a system having improved polymer property prediction capabilities.Type: ApplicationFiled: July 24, 2008Publication date: August 19, 2010Inventors: Jeffrey B. Drabish, John R. Parrish, Marcel Schaefer, Ivan J. Hartley, Pjaul K. Samples, Mark L. Nelson
-
Publication number: 20080119621Abstract: Embodiments of the invention provide a method of controlling a gas-phase polymerization process. The method includes determining a difference between a control variable of the polymerization process, such as the production rate, and the desired value of the control variable; adjusting or maintaining a first manipulated variable to at least partially compensate for the difference between the control variable and the desired value; and adjusting or maintaining a second manipulated variable to at least partially compensate for the effect of adjusting or maintaining the first manipulated variable.Type: ApplicationFiled: October 18, 2005Publication date: May 22, 2008Applicant: Dow Global Technologies Inc.Inventors: Paul K. Samples, John R. Parrish, Ivan J. Hartley, Jeffrey B. Drabish
-
Patent number: 7343225Abstract: 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 control variables for implementing the transition. Some embodiments also include the steps of setting the reaction conditions to determined initial conditions and then implementing the transition.Type: GrantFiled: June 3, 2005Date of Patent: March 11, 2008Assignee: Univation Technologies, LLCInventors: Ivan J. Hartley, John R. Parrish, Rich John Stolz
-
Patent number: 6846884Abstract: A method for controlling resin properties during the production of polyolefins is provided. The method utilizes coordinated manipulation of reaction temperature in combination with a secondary process variable to control resin flow properties to rapidly respond to manufacturing upsets or specification changes to minimize off-grade or transition polymer material when moving from one polymer grade to another, or during a disturbance in a steady state production.Type: GrantFiled: September 27, 2002Date of Patent: January 25, 2005Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: John R. Parrish, Ivan J. Hartley, Lonnie L. Pinson
-
Publication number: 20040063871Abstract: A method for controlling resin properties during the production of polyolefins is provided. The method utilizes coordinated manipulation of reaction temperature in combination with a secondary process variable to control resin flow properties to rapidly respond to manufacturing upsets or specification changes to minimize off-grade or transition polymer material when moving from one polymer grade to another, or during a disturbance in a steady state production.Type: ApplicationFiled: September 27, 2002Publication date: April 1, 2004Inventors: John R. Parrish, Ivan J. Hartley, Lonnie L. Pinson