Patents by Inventor David A. Hardie
David A. Hardie 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: 11827842Abstract: The disclosure relates to improved methods for inhibiting the formation and deposition of calcite scale in aqueous systems. In particular, the methods include injecting a composition into an aqueous system or wellbore. The composition includes a calcite scale inhibitor. The calcite scale inhibitor may be a copolymer of acrylic acid or methacrylic acid and an anionic monomer.Type: GrantFiled: October 21, 2021Date of Patent: November 28, 2023Assignee: ECOLAB USA Inc.Inventors: Dinesh Balkisan Mantri, David Hardie Rodman
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Publication number: 20230183111Abstract: A method of reducing activity of sulfur and/or nitrogen metabolizing bacteria is provided. The method includes adding a composition of an alkali metal salt of chlorite and/or an alkali metal salt of chlorate and hydrogen peroxide to process water of a cooling tower and increasing a concentration of the composition from about 0 ppm to about 300 ppm in about 1 to about 100 minutes. The method results in significant savings of caustic and reduces sulfur and/or nitrogen metabolizing bacteria in the process water.Type: ApplicationFiled: November 28, 2022Publication date: June 15, 2023Applicant: ECOLAB USA Inc.Inventors: Amit GUPTA, David Hardie RODMAN, Fritz Earwin Perez MONTEROZO, Dinesh Balkisan MANTRI, Tomy SURYATAMA, Fajar Muhammad RAHMAN, Achmad SYAH, Nugraha Yohannes ARIFPIN
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Publication number: 20220127514Abstract: The disclosure relates to improved methods for inhibiting the formation and deposition of calcite scale in aqueous systems. In particular, the methods include injecting a composition into an aqueous system or wellbore. The composition includes a calcite scale inhibitor. The calcite scale inhibitor may be a copolymer of acrylic acid or methacrylic acid and an anionic monomer.Type: ApplicationFiled: October 21, 2021Publication date: April 28, 2022Applicant: ECOLAB USA INC.Inventors: Dinesh Balkisan Mantri, David Hardie Rodman
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Patent number: 10183313Abstract: A system for producing sound waves in a medium, the system comprising: at least two first free-flooded ring transducers centered about a first axis, the first free-flooded ring transducers being substantially cylindrical and having an axial gap of height g therebetween such that they form a first column; and at least one cylindrical body centered about the first axis nested in the first column, such that the cylindrical body is aligned with the axial gap. The cylindrical body may be a tweeter free-flooded ring transducer. This provides for improved wideband performance in a free flooded ring array.Type: GrantFiled: August 11, 2014Date of Patent: January 22, 2019Assignee: Atlas Elektronik UK LtdInventor: David Hardie
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Publication number: 20160193629Abstract: A system for producing sound waves in a medium, the system comprising: at least two first free-flooded ring transducers centred about a first axis, the first free-flooded ring transducers being substantially cylindrical and having an axial gap of height g therebetween such that they form a first column; and at least one cylindrical body centred about the first axis nested in the first column, such that the cylindrical body is aligned with the axial gap. The cylindrical body may be a tweeter free-flooded ring transducer. This provides for improved wideband performance in a free flooded ring array.Type: ApplicationFiled: August 11, 2014Publication date: July 7, 2016Inventor: David Hardie
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Patent number: 7969141Abstract: An inductive proximity sensor or switch and a method of using same. The sensor or switch includes an Application Specific Integrated Circuit (“ASIC”) and a plurality of external components. The ASIC is implemented in CMOS technology and has an oscillator. A switch point of the sensor or switch is predetermined by selection of a bias voltage to a potential node of the oscillator.Type: GrantFiled: March 2, 2010Date of Patent: June 28, 2011Assignee: Honeywell International Inc.Inventor: David Hardie
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Publication number: 20100148799Abstract: An inductive proximity sensor or switch and a method of using same. The sensor or switch includes an Application Specific Integrated Circuit (“ASIC”) and a plurality of external components. The ASIC is implemented in CMOS technology and has an oscillator. A switch point of the sensor or switch is predetermined by selection of a bias voltage to a potential node of the oscillator.Type: ApplicationFiled: March 2, 2010Publication date: June 17, 2010Applicant: HONEYWELL INTERNATIONAL INC.Inventor: David Hardie
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Patent number: 7719262Abstract: An inductive proximity sensor or switch and a method of using same. The sensor or switch includes an Application Specific Integrated Circuit (“ASIC”) and a plurality of external components. The ASIC is implemented in CMOS technology and has an oscillator. A switch point of the sensor or switch is predetermined by selection of a bias voltage to a potential node of the oscillator.Type: GrantFiled: January 16, 2003Date of Patent: May 18, 2010Assignee: Honeywell International Inc.Inventor: David Hardie
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Patent number: 7665529Abstract: An improved lubricator valve arrangement for use within a wellbore to allow the passage of tools, such as perforating guns and the like, into the wellbore while it is live. The inclusion of two, independently controllable flapper-type safety valves within the lubricator valve will permit coordinated testing of fluid pressure both above and below the lubricator valve. The upper flapper valve includes a rotational flip-flap arm arrangement to positively open and close the upper flapper valve. The lower flapper valve is equipped with an integrated poppet-style pressure equalizing valve to allow the lower flapper valve to be opened more easily. The direction of opening of the flapper valves precludes or reduces the risk debris-related problems that might prevent or hinder opening of the flapper valves.Type: GrantFiled: November 27, 2006Date of Patent: February 23, 2010Assignee: Baker Hughes IncorporatedInventors: Graham E. Farquhar, David A. Hardie
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Publication number: 20070095546Abstract: An improved lubricator valve arrangement for use within a wellbore to allow the passage of tools, such as perforating guns and the like, into the wellbore while it is live. The inclusion of two, independently controllable flapper-type safety valves within the lubricator valve will permit coordinated testing of fluid pressure both above and below the lubricator valve. The upper flapper valve includes a rotational flip-flap arm arrangement to positively open and close the upper flapper valve. The lower flapper valve is equipped with an integrated poppet-style pressure equalizing valve to allow the lower flapper valve to be opened more easily. The direction of opening of the flapper valves precludes or reduces the risk debris-related problems that might prevent or hinder opening of the flapper valves.Type: ApplicationFiled: November 27, 2006Publication date: May 3, 2007Applicant: Baker Hughes IncorporatedInventors: Graham Farquhar, David Hardie
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Publication number: 20070036793Abstract: A method for identifying a compound for use in modulating, for example promoting, the activation or phosphorylation of AMPK (AMP-activated protein kinase) or AMPK subfamily member in a cell, the method comprising the steps of (1) determining whether a test compound modulates, for example promotes, the protein kinase activity of LKB1 and (2) selecting a compound which modulates, for example promotes, the protein kinase activity of LKB1. The protein kinase activity may be tested using AMPK or an AMPK subfamily member, or a peptide encompassing the T-loop region of AMPK or an AMPK subfamily member. The LKB1 may be in a preparation or complex with STRAD and/or M025, which has much greater kinase activity than LKB1 in the absence of these accessory proteins. The LKB1, STRAD or M025 may be recombinant. The AMPK subfamily member may be AMPK?1, AMPK?2, NUAK1, NUAK2, BRSK1, BRSK2, SIK, QIK, QSK, MARK1, MARK2, MARK3, MARK4 or MELK.Type: ApplicationFiled: July 16, 2004Publication date: February 15, 2007Inventors: David Hardie, Dario Alessi, Jerome Boudeau
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Publication number: 20030164697Abstract: An inductive proximity sensor or switch and a method of using same. The sensor or switch includes an Application Specific Integrated Circuit (“ASIC”) and a plurality of external components. The ASIC is implemented in CMOS technology and has an oscillator. A switch point of the sensor or switch is predetermined by selection of a bias voltage to a potential node of the oscillator.Type: ApplicationFiled: January 16, 2003Publication date: September 4, 2003Inventor: David Hardie