Patents by Inventor John Dewar
John Dewar 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: 11518969Abstract: This invention relates to a method for recovering beer during a beer brewing process. In the method, yeast entrained in beer 36 is recovered from a fermentation step 32. The yeast is separated from the beer to provide recovered beer 42. The recovered beer 42 is passed through an ultraviolet (UV) photo-sterilization unit 46, to provide sterilized recovered beer 48 which is recycled to the fermentation step 32. The invention uses ultraviolet light to achieve a microbially safe beer recovered from surplus yeast, and the recovered beer is recycled back to the brewing process, thereby saving financially as well as water loss.Type: GrantFiled: May 16, 2016Date of Patent: December 6, 2022Assignee: University of South AfricaInventors: Steven Craig Groeneveld, John Dewar
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Patent number: 10177369Abstract: A process and apparatus for continuously mixing and applying paste to battery grids for use in lead-acid battery systems, in which particulate lead oxide, water and sulphuric acid are reacted in an elongated mixer having a mixing to conveying ratio of about 65:35 to 80:20 with controlled reaction temperature for an exit product temperature in the range of above 60° C. to about 80° C. Additives including reinforcing fibers can be added in an amount up to 0.6 wt % of the lead oxide and carbon and graphite powder can be added in an amount up to 6 wt % of the lead oxide.Type: GrantFiled: June 20, 2007Date of Patent: January 8, 2019Assignee: MITEK HOLDINGS, INC.Inventors: Albert M. Vincze, Douglas G. Clark, Victor Nasri Saleh, Malcolm John Dewar, Robert W. Fritts
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Publication number: 20180258376Abstract: This invention relates to a method for recovering beer during a beer brewing process. In the method, yeast entrained in beer 36 is recovered from a fermentation step 32. The yeast is separated from the beer to provide recovered beer 42. The recovered beer 42 is passed through an ultraviolet (UV) photo-sterilization unit 46, to provide sterilized recovered beer 48 which is recycled to the fermentation step 32. The invention uses ultraviolet light to achieve a microbially safe beer recovered from surplus yeast, and the recovered beer is recycled back to the brewing process, thereby saving financially as well as water loss.Type: ApplicationFiled: May 16, 2016Publication date: September 13, 2018Inventors: Steven Craig Groeneveld, John Dewar
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Patent number: 9732578Abstract: A downhole sealing assembly comprises a sleeve adapted to be mounted on a tubular body disposable within a bore, the sleeve (12) including a swellable material and defining a sealing arrangement comprising inner and outer seals. Swelling of the material radially extends the inner seal into contact with the tubular body and extends the outer seal into contact with the bore.Type: GrantFiled: August 15, 2014Date of Patent: August 15, 2017Assignee: SWELLFIX B.V.Inventors: Graeme McRobb, John Dewar
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Publication number: 20140352983Abstract: A downhole sealing assembly comprises a sleeve adapted to be mounted on a tubular body disposable within a bore, the sleeve (12) including a swellable material and defining a sealing arrangement comprising inner and outer seals. Swelling of the material radially extends the inner seal into contact with the tubular body and extends the outer seal into contact with the bore. seals.Type: ApplicationFiled: August 15, 2014Publication date: December 4, 2014Applicant: SWELLFIX B.V.Inventors: Graeme McRobb, John Dewar
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Patent number: 8833473Abstract: A downhole sealing assembly (10) comprises a sleeve (12) adapted to be mounted on a body, the sleeve (12) including a swellable material and defining a sealing arrangement comprising inner and outer seals (18, 20). Swelling of the material radially extends the seals (18, 20).Type: GrantFiled: August 22, 2008Date of Patent: September 16, 2014Assignee: Swellfix B.V.Inventors: Graeme McRobb, John Dewar
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Patent number: 8727027Abstract: An expandable downhole seal includes a sealing portion and a deflecting portion adapted to move axially relative to each other to effect radial displacement of the sealing portion, wherein at least one of the sealing portion and the deflecting portion includes a swelling material. In use, radial expansion of the downhole seal may be achieved by the radial displacement of the sealing portion in combination with swelling of the swellable material. A support member is provided to support the sealing portion and deflecting portion.Type: GrantFiled: February 5, 2009Date of Patent: May 20, 2014Assignee: Swellfix B.V.Inventors: Paul Schilte, John Dewar, Arie Vliegenthart
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Patent number: 8197214Abstract: A compact variable pitch fan has a hydraulic pitch change mechanism. A pitch change piston is constrained to follow reciprocating motion under hydraulic control within a peripheral hub from which fan blades extend outward. An additional feature is the use of separated guiding and seal surfaces. A still further feature is the use of a pitch sensor, particularly on the hydraulic line leading to the variable pitch fan.Type: GrantFiled: April 29, 2008Date of Patent: June 12, 2012Assignee: Flexxaire Manufacturing Inc.Inventors: Jonathan Edwards McCallum, George Antoszko, Kevin John Dewar, Andrew Louis Norell, Cameron Dean Westbrook, Terry Dean Nelson, Brendan Anthony Romano
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Publication number: 20120138315Abstract: A downhole seal (10) comprises an inflatable structure (14) which receives a volume of swellable particles (18) at a downhole location. The seal (10) is adapted to permit the swellable particles (18) to become exposed to an activator to initiate selling of said particles (18) to inflate the inflatable structure (14).Type: ApplicationFiled: September 8, 2009Publication date: June 7, 2012Applicant: SWELLFIX B.V.Inventors: John Dewar, Arie Vliegenthart
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Patent number: 8025102Abstract: An apparatus for delivering a material into a wellbore comprises a body adapted to be translated along a conduit within a wellbore, with a cavity formed in the body for containing a material to be delivered. The body defines an outlet adapted to be selectively opened to permit the material to be released from the cavity at the required location within the wellbore. In one arrangement the material includes swellable particles which expand upon contact with an activator.Type: GrantFiled: June 19, 2008Date of Patent: September 27, 2011Assignee: Swellfix BVInventor: John Dewar
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Publication number: 20110193291Abstract: An expandable downhole seal includes a sealing portion and a deflecting portion adapted to move axially relative to each other to effect radial displacement of the sealing portion, wherein at least one of the sealing portion and the deflecting portion includes a swelling material. In use, radial expansion of the downhole seal may be achieved by the radial displacement of the sealing portion in combination with swelling of the swellable material. A support member is provided to support the sealing portion and deflecting portion.Type: ApplicationFiled: February 5, 2009Publication date: August 11, 2011Inventors: Paul Schilte, John Dewar, Arie Vliegenthart
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Publication number: 20100307771Abstract: A downhole sealing assembly (10) comprises a sleeve (12) adapted to be mounted on a body, the sleeve (12) including a swellable material and defining a sealing arrangement comprising inner and outer seals (18, 20). Swelling of the material radially extends the seals (18, 20).Type: ApplicationFiled: August 22, 2008Publication date: December 9, 2010Applicant: SWELLFIX B.V.Inventors: Graeme McRobb, John Dewar
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Publication number: 20100300689Abstract: A downhole sealing assembly (10) includes a sleeve (12) comprising a swellable medium (22). The sleeve (12) is mounted on a base pipe (14) and defines a flow path (18) between the sleeve (12) and the base pipe (14).Type: ApplicationFiled: August 26, 2008Publication date: December 2, 2010Applicant: SWELLFIX B.V.Inventors: Graeme McRobb, John Dewar
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Publication number: 20090200028Abstract: An apparatus for delivering a material into a wellbore comprises a body adapted to be translated along a conduit within a wellbore, with a cavity formed in the body for containing a material to be delivered. The body defines an outlet adapted to be selectively opened to permit the material to be released from the cavity at the required location within the wellbore. In one arrangement the material includes swellable particles which expand upon contact with an activator.Type: ApplicationFiled: June 19, 2008Publication date: August 13, 2009Applicant: Swellfix BVInventor: John Dewar
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Publication number: 20090196747Abstract: A compact variable pitch fan has a hydraulic pitch change mechanism. A pitch change piston is constrained to follow reciprocating motion under hydraulic control within a peripheral hub from which fan blades extend outward. An additional feature is the use of separated guiding and seal surfaces. A still further feature is the use of a pitch sensor, particularly on the hydraulic line leading to the variable pitch fan.Type: ApplicationFiled: April 29, 2008Publication date: August 6, 2009Applicant: FLEXXAIRE MANUFACTURING INC.Inventors: Jonathan Edwards McCallum, George Antoszko, Kevin John Dewar, Andrew Louis Norell, Cameron Dean Westbrook, Terry Dean Nelson, Brendan Anthony Romano
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Publication number: 20050252651Abstract: A wellbore device is provided which includes a fluid passage for transferring fluid between an earth formation and a surface facility, and a body transferable from a first mode to a second mode upon contact of the body with a selected fluid. The body is arranged so as to substantially close the fluid passage upon transfer of the body from the first mode to the second mode due to contact of the body with the selected fluid.Type: ApplicationFiled: September 5, 2003Publication date: November 17, 2005Applicant: Shell Oil CompanyInventors: Martin Bosma, Erik Cornelissen, Jan Vollebregt, John Dewar, David Mason
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Publication number: 20030196167Abstract: A computer management system is provided for operating a computer and application programs from projects. The system stores information related to individual projects in memory of the computer and comprises project selection means for selecting a desired project and linking means for linking information and tasks related to each project. The linking means has a file path including task categories and information classes for each task category so that documents for each class are automatically saved in a predefined path. The information classes are adapted to contain document identifications. In use the selection means is used to select a project and from which a desired document in an information class can be selected. The system can create a new project with newly defined linkages, save off an existing project or model on a project template. Any of the projects can be made a project template.Type: ApplicationFiled: April 10, 2003Publication date: October 16, 2003Applicant: EPITROPOS PTY LTD.Inventor: Gregory John Dewar
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Patent number: 5531505Abstract: A head restraint includes a generally U-shaped cradle pivotally connected to a head restraint main body with leg members of the cradle selectively pivotable between an articulated position projecting forwardly from the main body and a retracted position with the leg members generally coplanar with the main body. An elongated support axle extends through the main body and is rotatably mounted therein to pivot the cradle between the articulated and retracted positions. A detent is mounted to a base plate within the main body and selectively engages depressions around the circumference of the axle, to selectively retain the cradle in a variety of positions between the articulated and retracted orientations.Type: GrantFiled: February 25, 1994Date of Patent: July 2, 1996Assignee: Tri-Con Industries, Ltd.Inventors: Robert J. Baetz, John A. Dewar, Douglas K. Dunsmore, Christopher Harbowy, Dennis A. Majewski, Louis M. Shawbitz, Thomas A. Welch