Patents by Inventor David PETRAK
David PETRAK 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).
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Patent number: 11717585Abstract: A cleaning, sanitizing or disinfecting scrubbing device includes a body, a non-thermal plasma generator and damp wipe. Generated plasma activates fluid in the wipe. The device may include spacer posts between the body and wipe and a conductive mesh between the body and wipe or embedded in the wipe. Another embodiment includes a reservoir for holding a water-based fluid, a fluid delivery element connected to the reservoir by a tube through which the fluid can flow and a non-thermal plasma generator. The non-thermal plasma generator activates the fluid. In one embodiment the scrubbing device is a mitt. In another embodiment the scrubbing device is a glove.Type: GrantFiled: September 3, 2021Date of Patent: August 8, 2023Assignee: GOJO Industries, Inc.Inventors: Jeffrey S. Louis, Tsung-Chan Tsai, Daphne Pappas Antonakas, David Petrak, Sameer Kalghatgi, Robert L. Gray
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Publication number: 20210393827Abstract: A cleaning, sanitizing or disinfecting scrubbing device includes a body, a non-thermal plasma generator and damp wipe. Generated plasma activates fluid in the wipe. The device may include spacer posts between the body and wipe and a conductive mesh between the body and wipe or embedded in the wipe. Another embodiment includes a reservoir for holding a water-based fluid, a fluid delivery element connected to the reservoir by a tube through which the fluid can flow and a non-thermal plasma generator. The non-thermal plasma generator activates the fluid. In one embodiment the scrubbing device is a mitt. In another embodiment the scrubbing device is a glove.Type: ApplicationFiled: September 3, 2021Publication date: December 23, 2021Inventors: Jeffrey S. Louis, Tsung-Chan Tsai, Daphne Pappas Antonakas, David Petrak, Sameer Kalghatgi, Robert L. Gray
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Patent number: 11123446Abstract: A cleaning, sanitizing or disinfecting scrubbing device includes a body, a non-thermal plasma generator and damp wipe. Generated plasma activates fluid in the wipe. The device may include spacer posts between the body and wipe and a conductive mesh between the body and wipe or embedded in the wipe. Another embodiment includes a reservoir for holding a water-based fluid, a fluid delivery element connected to the reservoir by a tube through which the fluid can flow and a non-thermal plasma geneator. The non-thermal plasma generator activates the fluid. In one embodiment the scrubbing device is a mitt. In another embodiment the scrubbing device is a glove.Type: GrantFiled: July 27, 2016Date of Patent: September 21, 2021Assignee: GOJO Industries, Inc.Inventors: Jeffrey S. Louis, Tsung-Chan Tsai, Daphne Pappas Antonakas, David Petrak, Sameer Kalghatgi, Robert L. Gray
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Patent number: 11007289Abstract: A method for pressurizing a sterilization chamber of a steam sterilizer with a controlled rate of pressure change. Pressure is increased in the sterilization chamber by opening a steam-to-chamber valve for a pulse duration during each of a plurality of time PERIODS needed to reach a target pressure value. During each time PERIOD, the steam-to-chamber valve is moved to an open state for the duration of the pulse. An error value indicative of the difference between a Theoretical Pressure and a Measured Pressure is determined at the end of each PERIOD. This error value is used to determine the duration of the pulse for the subsequent PERIOD, thereby maintaining a desired rate of pressure change in the sterilization chamber.Type: GrantFiled: February 14, 2019Date of Patent: May 18, 2021Assignee: American Sterilizer CompanyInventors: David Petrak, Richard P. Thurman
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Publication number: 20200261609Abstract: A method for pressurizing a sterilization chamber of a steam sterilizer with a controlled rate of pressure change. Pressure is increased in the sterilization chamber by opening a steam-to-chamber valve for a pulse duration during each of a plurality of time PERIODS needed to reach a target pressure value. During each time PERIOD, the steam-to-chamber valve is moved to an open state for the duration of the pulse. An error value indicative of the difference between a Theoretical Pressure and a Measured Pressure is determined at the end of each PERIOD. This error value is used to determine the duration of the pulse for the subsequent PERIOD, thereby maintaining a desired rate of pressure change in the sterilization chamber.Type: ApplicationFiled: February 14, 2019Publication date: August 20, 2020Applicant: American Sterilizer CompanyInventors: David Petrak, Richard P. Thurman
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Patent number: 10119107Abstract: The present invention are directed to a novel automated cell bioprinter and related methods for making three-dimensional tissue constructs with spatial organization of cells that provides: (i) organized cell placement and spatial assembly of multiple cell types in a reproducible manner (ii) direct and non-contact assembly of multiple cell types and/or cell layers without exerting damaging forces on the cells or tissues, (iii) retention of cell viability and functionality during assembly steps and long periods of culture, (iv) minimal use of harmful and toxic chemicals such as profuse amounts of mineral oil and buffer reagent, and (v) efficient layer-to-layer assembly of cell layers within the three-dimensional construct while (vi) avoiding the use of complicated surface treatments that prevents scale-up, and (vii) avoiding mutation-inducing radiations such as UV used to photocrosslink hydrogels.Type: GrantFiled: May 30, 2014Date of Patent: November 6, 2018Assignee: The University of AkronInventors: Hossein Tavana, David Petrak
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Publication number: 20180214586Abstract: A cleaning, sanitizing or disinfecting scrubbing device includes a body, a non-thermal plasma generator and damp wipe. Generated plasma activates fluid in the wipe. The device may include spacer posts between the body and wipe and a conductive mesh between the body and wipe or embedded in the wipe. Another embodiment includes a reservoir for holding a water- based fluid, a fluid delivery element connected to the reservoir by a tube through which the fluid can flow and a non-thermal plasma geneator. The non-thermal plasma generator activates the fluid. In one embodiment the scrubbing device is a mitt. In another embodiment the scrubbing device is a glove.Type: ApplicationFiled: July 27, 2016Publication date: August 2, 2018Inventors: Jeffrey S. Louis, Tsung-Chan Tsai, Daphne Pappas Antonakas, David Petrak, Sameer Kalghatgi, Robert L. Gray
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Publication number: 20160121134Abstract: A medical device for directly applying DBD plasma includes a plasma generation module having an electrode surrounded by a dielectric barrier. In one embodiment, when a high voltage source is applied to the electrode, plasma is produced from ambient gas on an outside surface of the plasma generation module. In another embodiment, an enclosure is deployed around the distal end of the plasma generation module surrounding the electrode. Gas flows past the electrode and into the enclosure. In some embodiments, some or all of the gas is removed or pumped out of the enclosure by suction/vacuum. When a high voltage source is applied to the electrode, plasma is produced using the gas flowing into the enclosure.Type: ApplicationFiled: October 23, 2015Publication date: May 5, 2016Inventors: Sameer Kalghatgi, David Petrak, Tsung-Chan Tsai, Daphne Pappas Antonakas, Robert L. Gray
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Publication number: 20160083681Abstract: The present invention are directed to a novel automated cell bioprinter and related methods for making three-dimensional tissue constructs with spatial organization of cells that provides: (i) organized cell placement and spatial assembly of multiple cell types in a reproducible manner (ii) direct and non-contact assembly of multiple cell types and/or cell layers without exerting damaging forces on the cells or tissues, (iii) retention of cell viability and functionality during assembly steps and long periods of culture, (iv) minimal use of harmful and toxic chemicals such as profuse amounts of mineral oil and buffer reagent, and (v) efficient layer-to-layer assembly of cell layers within the three-dimensional construct while (vi) avoiding the use of complicated surface treatments that prevents scale-up, and (vii) avoiding mutation-inducing radiations such as UV used to photocrosslink hydrogels.Type: ApplicationFiled: May 30, 2014Publication date: March 24, 2016Applicant: THE UNIVERSITY OF AKRONInventors: Hossein TAVANA, David PETRAK