Patents by Inventor David Heidel
David Heidel 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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Publication number: 20080161601Abstract: The invention provides a process for the recovery of citric acid from an aqueous solution feed stream originating in germination of carbohydrates and utilizing an amine solvent extraction step for separation of impurities comprising: subjecting said aqueous solution feed stream A to a treatment for partial recovery of citric acid, wherein said treatment is other than amine solvent extraction, to form a first portion of purified citric acid B and a secondary feed stream F; subjecting at least a portion G of said secondary feed stream F to a treatment consisting of amine solvent extraction to form a second portion of purified citric acid solution and to reject substantial of impurities initially present in said portion of said secondary feed stream; subjecting said second portion of purified citric acid solution to crystallization; and recycling mother liquor from said crystallization.Type: ApplicationFiled: March 17, 2008Publication date: July 3, 2008Applicant: A.E. STALEY MANUFACTURING COMPANYInventors: Avraham BANIEL, Asher Vitner, David Gonen, David Heidel
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Publication number: 20060247468Abstract: The invention provides a process for the recovery of citric acid from an aqueous solution feed stream originating in fermentation of carbohydrates and utilizing an amine solvent extraction step for separation of impurities comprising: subjecting said aqueous solution feed stream A to a treatment for partial recovery of citric acid, wherein said treatment is other than amine solvent extraction, to form a first portion of purified citric acid B and a secondary feed stream F; subjecting at least a portion G of said secondary feed stream F to a treatment consisting of amine solvent extraction to form a second portion of purified citric acid solution and to reject substantial of impurities initially present in said portion of said secondary feed stream; subjecting said second portion of purified citric acid solution to crystallization; and recycling mother liquor from said crystallization.Type: ApplicationFiled: March 3, 2004Publication date: November 2, 2006Applicant: A.E. Staley Manufacturing CompanyInventors: Avraham Baniel, Asher Vitner, David Gonen, David Heidel
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Patent number: 6942803Abstract: A process is disclosed for purifying an aqueous feed stream comprising a product organic acid, such as lactic acid, and a strong contaminant, such as pyruvic acid or oxalic acid. The molar concentration of the product organic acid in the feed stream typically is at least 20 times greater than the molar concentration of the strong contaminant. The aqueous feed stream is contacted with a first immiscible basic extractant that has at least a 3-fold greater affinity for the strong contaminant than for the product organic acid. The majority of the strong contaminant and some product organic acid become complexed with the first immiscible basic extractant. The complexed first immiscible basic extractant is separated from the aqueous stream, thereby producing a first effluent stream that comprises product organic acid and that has a greater ratio of molar product organic acid to molar strong contaminant than the aqueous feed stream did.Type: GrantFiled: November 15, 2002Date of Patent: September 13, 2005Assignee: A.E. Staley Manufacturing Co.Inventors: Michael Charles Milner Cockrem, Istvan Kovacs, Idris Mohamednur, David Heidel, Avraham M. Baniel
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Publication number: 20050036578Abstract: An on-chip jitter measurement circuit and corresponding method are provided for receiving a reference clock and a signal of interest, including a latch for comparing the arrival time of the signal of interest to the reference clock, a delay chain in signal communication with the reference clock for varying the arrival time of the reference clock, the delay chain having a first stage, a middle stage, and a last stage, a voltage controller in signal communication with the middle stage of the delay chain for controlling the delay of the arrival time of the reference clock while permitting the first and last stages of the delay chain to retain a full voltage swing independent of the delay.Type: ApplicationFiled: August 11, 2003Publication date: February 17, 2005Applicant: International Business Machines CorporationInventors: David Heidel, Keith Jenkins
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Patent number: 6641734Abstract: A process is disclosed for purifying an aqueous feed stream comprising a product organic acid, such as lactic acid, and a strong contaminant, such as pyruvic acid or oxalic acid. The molar concentration of the product organic acid in the feed stream typically is at least 20 times greater than the molar concentration of the strong contaminant. The aqueous feed stream is contacted with a first immiscible basic extractant that has at least a 3-fold greater affinity for the strong contaminant than for the product organic acid. The majority of the strong contaminant and some product organic acid become complexed with the first immiscible basic extractant. The complexed first immiscible basic extractant is separated from the aqueous stream, thereby producing a first effluent stream that comprises product organic acid and that has a greater ratio of molar product organic acid to molar strong contaminant than the aqueous feed stream did.Type: GrantFiled: January 3, 2002Date of Patent: November 4, 2003Assignee: A. E. Staley Manufacturing Co.Inventors: Michael Charles Milner Cockrem, Istvan Kovacs, Idris Mohamednur, David Heidel
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Publication number: 20030171615Abstract: A process is disclosed for purifying an aqueous feed stream comprising a product organic acid, such as lactic acid, and a strong contaminant, such as pyruvic acid or oxalic acid. The molar concentration of the product organic acid in the feed stream typically is at least 20 times greater than the molar concentration of the strong contaminant. The aqueous feed stream is contacted with a first immiscible basic extractant that has at least a 3-fold greater affinity for the strong contaminant than for the product organic acid. The majority of the strong contaminant and some product organic acid become complexed with the first immiscible basic extractant. The complexed first immiscible basic extractant is separated from the aqueous stream, thereby producing a first effluent stream that comprises product organic acid and that has a greater ratio of molar product organic acid to molar strong contaminant than the aqueous feed stream did.Type: ApplicationFiled: November 15, 2002Publication date: September 11, 2003Inventors: Michael Charles Milner Cockrem, Istvan Kovacs, Idris Mohamednur, David Heidel, Avraham M. Baniel
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Publication number: 20030155298Abstract: A process is disclosed for purifying an aqueous feed stream comprising a product organic acid, such as lactic acid, and a strong contaminant, such as pyruvic acid or oxalic acid. The molar concentration of the product organic acid in the feed stream typically is at least 20 times greater than the molar concentration of the strong contaminant. The aqueous feed stream is contacted with a first immiscible basic extractant that has at least a 3-fold greater affinity for the strong contaminant than for the product organic acid. The majority of the strong contaminant and some product organic acid become complexed with the first immiscible basic extractant. The complexed first immiscible basic extractant is separated from the aqueous stream, thereby producing a first effluent stream that comprises product organic acid and that has a greater ratio of molar product organic acid to molar strong contaminant than the aqueous feed stream did.Type: ApplicationFiled: January 3, 2002Publication date: August 21, 2003Applicant: A.E. Staley Manufacturing Co.Inventors: Michael Charles Milner Cockrem, Istvan Kovacs, Idris Mohamednur, David Heidel
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Patent number: 4932909Abstract: A locking mechanism for a two piece cowling for a marine engine includes a latch that is pivotally mounted on the lower cowling piece and includes a handle disposed within a recess on the exterior of the lower cowling so that when the latch is in its locked position, the handle is contained by the recess and is flush with the cowling so as not to detract from the styling of the cowling and the longitudinal axis of the elongated handle is disposed parallel to forces acting on the lower unit of the engine so as to resist forces tending to move the handle to its release position.Type: GrantFiled: June 2, 1989Date of Patent: June 12, 1990Assignee: Brunswick CorporationInventors: Mark D. Curtis, David Heidel
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Patent number: 4871333Abstract: A locking mechanism for a two piece cowling for a marine engine includes a latch that is pivotally mounted on the lower cowling piece and includes a handle disposed within a recess on the exterior of the lower cowling so that when the latch is in its locked position, the handle is contained by the recess and is flush with the cowling so as not to detract from the styling of the cowling.Type: GrantFiled: June 30, 1988Date of Patent: October 3, 1989Assignee: Brunswick CorporationInventors: Mark D. Curtis, David Heidel