Patents by Inventor David Woodson
David Woodson 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: 11718793Abstract: Method and apparatus to facilitate recycling of at least one fraction of bitumen-containing materials. This can be accomplished by dissolving the at least one fraction, for example, maltenes or asphaltenes in roofing shingles, into at least one solvent. In one aspect, the apparatus comprises a dissolution vessel, a tumbler positioned therein, and at least one solvent distributor. The tumbler is configured to facilitate wetting the bitumen-containing materials with solvent. In a second aspect, a system comprises the apparatus, a solid-liquid separator, for example, a vibratory screen, and at least one solvent-fraction separator, for example, a flash drum. The at least one solvent can comprise one or more solvents useful to extract the at least one fraction. In a third aspect, a first fraction is extracted from the bitumen-containing materials with a first solvent composition, then a second fraction is extracted from the remaining bitumen-containing materials with a second solvent composition.Type: GrantFiled: May 24, 2021Date of Patent: August 8, 2023Assignee: Shingle Resource Recycling, LLCInventors: Robert William Palmer, Stephen Woodson Craig, David Woodson Craig, Randell Gween Shelton, Jr.
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Publication number: 20210348057Abstract: Method and apparatus to facilitate recycling of at least one fraction of bitumen-containing materials. This can be accomplished by dissolving the at least one fraction, for example, maltenes or asphaltenes in roofing shingles, into at least one solvent. In one aspect, the apparatus comprises a dissolution vessel, a tumbler positioned therein, and at least one solvent distributor. The tumbler is configured to facilitate wetting the bitumen-containing materials with solvent. In a second aspect, a system comprises the apparatus, a solid-liquid separator, for example, a vibratory screen, and at least one solvent-fraction separator, for example, a flash drum. The at least one solvent can comprise one or more solvents useful to extract the at least one fraction. In a third aspect, a first fraction is extracted from the bitumen-containing materials with a first solvent composition, then a second fraction is extracted from the remaining bitumen-containing materials with a second solvent composition.Type: ApplicationFiled: May 24, 2021Publication date: November 11, 2021Inventors: Robert William PALMER, Stephen Woodson CRAIG, David Woodson CRAIG, Randell Gween SHELTON, JR.
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Patent number: 11015125Abstract: Method and apparatus to facilitate recycling of at least one fraction of bitumen-containing materials. This can be accomplished by dissolving the at least one fraction, for example, maltenes or asphaltenes in roofing shingles, into at least one solvent. In one aspect, the apparatus comprises a dissolution vessel, a tumbler positioned therein, and at least one solvent distributor. The tumbler is configured to facilitate wetting the bitumen-containing materials with solvent. In a second aspect, a system comprises the apparatus, a solid-liquid separator, for example, a vibratory screen, and at least one solvent-fraction separator, for example, a flash drum. The at least one solvent can comprise one or more solvents useful to extract the at least one fraction. In a third aspect, a first fraction is extracted from the bitumen-containing materials with a first solvent composition, then a second fraction is extracted from the remaining bitumen-containing materials with a second solvent composition.Type: GrantFiled: April 27, 2018Date of Patent: May 25, 2021Assignee: SHINGLE RESOURCE RECYCLING, LLCInventors: Robert William Palmer, Stephen Woodson Craig, David Woodson Craig, Randell Gween Shelton, Jr.
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Patent number: 10695769Abstract: Method and apparatus to facilitate recycling of at least one fraction of bitumen-containing materials. This can be accomplished by dissolving the at least one fraction, for example, maltenes or asphaltenes in roofing shingles, into at least one solvent. In one aspect, the apparatus comprises a dissolution vessel, a tumbler positioned therein, and at least one solvent distributor. The tumbler is configured to facilitate wetting the bitumen-containing materials with solvent. In a second aspect, a system comprises the apparatus, a solid-liquid separator, for example, a vibratory screen, and at least one solvent-fraction separator, for example, a flash drum. The at least one solvent can comprise one or more solvents useful to extract the at least one fraction. In a third aspect, a first fraction is extracted from the bitumen-containing materials with a first solvent composition, then a second fraction is extracted from the remaining bitumen-containing materials with a second solvent composition.Type: GrantFiled: February 16, 2018Date of Patent: June 30, 2020Assignee: Shingle Resource Recycling, LLCInventors: Robert William Palmer, Stephen Woodson Craig, David Woodson Craig, Randell Gween Shelton, Jr.
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Patent number: 10619104Abstract: Method and apparatus to facilitate recycling of at least one fraction of bitumen-containing materials. This can be accomplished by dissolving the at least one fraction, for example, maltenes or asphaltenes in roofing shingles, into at least one solvent. In one aspect, the apparatus comprises a dissolution vessel, a tumbler positioned therein, and at least one solvent distributor. The tumbler is configured to facilitate wetting the bitumen-containing materials with solvent. In a second aspect, a system comprises the apparatus, a solid-liquid separator, for example, a vibratory screen, and at least one solvent-fraction separator, for example, a flash drum. The at least one solvent can comprise one or more solvents useful to extract the at least one fraction. In a third aspect, a first fraction is extracted from the bitumen-containing materials with a first solvent composition, then a second fraction is extracted from the remaining bitumen-containing materials with a second solvent composition.Type: GrantFiled: April 27, 2018Date of Patent: April 14, 2020Assignee: Shingle Resource Recycling, LLCInventors: Robert William Palmer, Stephen Woodson Craig, David Woodson Craig, Randell Gween Shelton, Jr.
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Publication number: 20190255534Abstract: Method and apparatus to facilitate recycling of at least one fraction of bitumen-containing materials. This can be accomplished by dissolving the at least one fraction, for example, maltenes or asphaltenes in roofing shingles, into at least one solvent. In one aspect, the apparatus comprises a dissolution vessel, a tumbler positioned therein, and at least one solvent distributor. The tumbler is configured to facilitate wetting the bitumen-containing materials with solvent. In a second aspect, a system comprises the apparatus, a solid-liquid separator, for example, a vibratory screen, and at least one solvent-fraction separator, for example, a flash drum. The at least one solvent can comprise one or more solvents useful to extract the at least one fraction. In a third aspect, a first fraction is extracted from the bitumen-containing materials with a first solvent composition, then a second fraction is extracted from the remaining bitumen-containing materials with a second solvent composition.Type: ApplicationFiled: February 16, 2018Publication date: August 22, 2019Inventors: Randell Gween Shelton, JR., Stephen Woodson Craig, David Woodson Craig, Robert William Palmer
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Publication number: 20190256782Abstract: Method and apparatus to facilitate recycling of at least one fraction of bitumen-containing materials. This can be accomplished by dissolving the at least one fraction, for example, maltenes or asphaltenes in roofing shingles, into at least one solvent. In one aspect, the apparatus comprises a dissolution vessel, a tumbler positioned therein, and at least one solvent distributor. The tumbler is configured to facilitate wetting the bitumen-containing materials with solvent. In a second aspect, a system comprises the apparatus, a solid-liquid separator, for example, a vibratory screen, and at least one solvent-fraction separator, for example, a flash drum. The at least one solvent can comprise one or more solvents useful to extract the at least one fraction. In a third aspect, a first fraction is extracted from the bitumen-containing materials with a first solvent composition, then a second fraction is extracted from the remaining bitumen-containing materials with a second solvent composition.Type: ApplicationFiled: April 27, 2018Publication date: August 22, 2019Inventors: Randell Gween SHELTON, JR., Stephen Woodson CRAIG, David Woodson CRAIG, Robert William PALMER
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Publication number: 20190256783Abstract: Method and apparatus to facilitate recycling of at least one fraction of bitumen-containing materials. This can be accomplished by dissolving the at least one fraction, for example, maltenes or asphaltenes in roofing shingles, into at least one solvent. In one aspect, the apparatus comprises a dissolution vessel, a tumbler positioned therein, and at least one solvent distributor. The tumbler is configured to facilitate wetting the bitumen-containing materials with solvent. In a second aspect, a system comprises the apparatus, a solid-liquid separator, for example, a vibratory screen, and at least one solvent-fraction separator, for example, a flash drum. The at least one solvent can comprise one or more solvents useful to extract the at least one fraction. In a third aspect, a first fraction is extracted from the bitumen-containing materials with a first solvent composition, then a second fraction is extracted from the remaining bitumen-containing materials with a second solvent composition.Type: ApplicationFiled: April 27, 2018Publication date: August 22, 2019Inventors: Randell Gween Shelton, JR., Stephen Woodson CRAIG, David Woodson CRAIG, Robert William PALMER
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Patent number: 5165387Abstract: A disposable endoscope kit 10 has a speculum member 22 and a disposable light source 24. The light source includes a battery 48 and a light bulb 46 mounted within a housing 44. The housing 44 is a clip mounted onto the tubular wall 36 of speculum member 22 in proximity to the proximal viewing end 28. The housing 44 is mounted substantially within the speculum member 22 between the proximal viewing end 28 and the distal insertable end 26. The light source 24 has a switch 50 which is activated when the light source 24 is mounted to the speculum 22 to direct light toward end 26.Type: GrantFiled: February 4, 1991Date of Patent: November 24, 1992Assignee: Transidyne General CorporationInventor: David Woodson