Patents by Inventor Roger M. Rowell
Roger M. Rowell 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: 9151000Abstract: A one or two step process for the acetylation and refining of wood pieces in which acetylation and refining to a reduced geometry take place simultaneously in the refiner. Engineered board products comprising acetylated reduced geometry materials possess high dimensional stability and durability compared to like board products comprising non-acetylated materials.Type: GrantFiled: September 16, 2011Date of Patent: October 6, 2015Assignee: Titan Wood LimitedInventor: Roger M. Rowell
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Publication number: 20130303751Abstract: A one or two step process for the acetylation and refining of wood pieces in which acetylation and refining to a reduced geometry take place simultaneously in the refiner. Engineered board products comprising acetylated reduced geometry materials possess high dimensional stability and durability compared to like board products comprising non-acetylated materials.Type: ApplicationFiled: September 16, 2011Publication date: November 14, 2013Applicant: TITAN WOOD LIMITEDInventor: Roger M. Rowell
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Patent number: 5683820Abstract: Wood products impregnated with from 30 to 80% of a polymerizable monomer selected from the group consisting of hexanediol diacrylate and hexanediol dimethacrylate have excellent indent resistance. The wood products are impregnated with the monomer solution by placing the wood under a vacuum to remove air, contacting the wood with a monomer solution containing a polymerizable hexanediol diacrylate and/or hexanediol dimethacrylate monomer and from 0.5 to about 2 percent of a thermally activated free radical source as a polymerization initiator for a period sufficient to achieve the desired polymer loading. The wood is then heated under pressure to polymerize or cure the monomers.Type: GrantFiled: December 8, 1995Date of Patent: November 4, 1997Assignee: Triangle Pacific CorporationInventors: B. Shannon Fuller, W. Dale Ellis, Roger M. Rowell
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Patent number: 5609915Abstract: Wood products impregnated with from 30 to 80% of a polymerizable monomer selected from the group consisting of hexanediol diacrylate and hexanediol dimethacrylate have excellent indent resistance. The wood products are impregnated with the monomer solution by placing the wood under a vacuum to remove air, contacting the wood with a monomer solution containing a polymerizable hexanediol diacrylate and/or hexanediol dimethacrylate monomer and from 0.5 to about 2 percent of a thermally activated free radical source as a polymerization initiator for a period sufficient to achieve the desired polymer loading. The wood is then heated under pressure to polymerize or cure the monomers.Type: GrantFiled: February 2, 1996Date of Patent: March 11, 1997Assignee: Triangle Pacific CorporationInventors: B. Shannon Fuller, W. Dale Ellis, Roger M. Rowell
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Patent number: 5605767Abstract: Wood products impregnated with from 30 to 80% of a polymerizable monomer selected from the group consisting of hexanediol diacrylate and hexanediol dimethacrylate have excellent indent resistance. The wood products are impregnated with the monomer solution by placing the wood under a vacuum to remove air, contacting the wood with a monomer solution containing a polymerizable hexanediol diacrylate and/or hexanediol dimethacrylate monomer and from 0.5 to about 2 percent of a thermally activated free radical source as a polymerization initiator for a period sufficient to achieve the desired polymer loading. The wood is then heated under pressure to polymerize or cure the monomers.Type: GrantFiled: February 2, 1996Date of Patent: February 25, 1997Assignee: Triangle Pacific CorporationInventors: B. Shannon Fuller, W. Dale Ellis, Roger M. Rowell
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Patent number: 5512098Abstract: Apparatus for impregnating wood veneer with a liquid impregnant comprises a container having an upper chamber communicated to a lower impregnation chamber. A clamping mechanism is releasably engageable to a peripheral region of the wood veneer and is cooperably received in the upper chamber in a manner to suspend the wood veneer in the impregnation chamber. An elevator overlies the container and is releasably connectable to the clamping mechanism for lowering the clamping mechanism into the upper chamber to suspend the wood veneer in the impregnation chamber therebelow. The clamping mechanism is disconnected from the elevator such that the clamping mechanism remains in the upper chamber during impregnation of the wood veneer with liquid impregnant. The impregnation chamber is evacuated by a vacuum pump after the wood veneer is suspended therein, and liquid impregnant is introduced from a storage tank to the impregnation chamber about the wood veneer.Type: GrantFiled: August 2, 1994Date of Patent: April 30, 1996Assignees: Hawworth, Inc., The United States of America, as represented by the Secretary of AgricultureInventors: Nicholas A. French, W. Dale Ellis, Roger M. Rowell
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Patent number: 5470614Abstract: This invention is a method for the protection of wood and other lignocellulosic materials from attack by micro-organisms with the use of iodates. The method consists of treating wood or other lignocellulosic material by soaking it in a solution of iodate for a period of time ranging from three hours to seven days at temperatures between 20.degree. C. and 50.degree. C. The treated material is then removed from the solution and dried. Wood treated with this method shows resistance to attack by wood-degrading micro-organisms. Furthermore, the iodates are resistant to leaching from the wood and other lignocellulosic materials after such treatment.Type: GrantFiled: April 6, 1995Date of Patent: November 28, 1995Assignee: The United States of America as represented by the Secretary of AgricultureInventors: George C. Chen, Roger M. Rowell
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Patent number: 4804384Abstract: Reaction of lignocellulosic material with uncatalyzed acetic anhydride in the absence of any cosolvent is disclosed. The process improves dimensional stability and resistance to biological attack of the lignocellulosic material. Lignocellulosic material is treated by exposure to liquid acetic anhydride for at least a short period of time, after which it is then heated to acetylate the material. The excess anhydride and byproduct acetic acid can be removed by vacuum.Type: GrantFiled: April 8, 1987Date of Patent: February 14, 1989Assignee: The United States of America as represented by the Secretary of AgricultureInventors: Roger M. Rowell, Rune Simonson, Anne-Marie Tillman
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Patent number: 4477389Abstract: Two procedures are described that can be used to prepare polyhalogenated phenyl isocyanates (2,4,6-trichloro,2,3,5,6-tetrachloro, pentachloro, 2,4,6-tribromo and 2,4,6-trifluoro derivatives) from the corresponding anilines in good yields (95-99%) with small amounts of urea byproducts (1-5%) within reasonable reaction times (3-6 hours). These are:1. Liquid phase phosgenation of polyhalogenated anilines with tertiary amines as a hydrogen chloride acceptor.2. Liquid phase phosgenation of polyhalogenated anilines in excess phosgene at the beginning and throughout the reaction.Type: GrantFiled: October 25, 1982Date of Patent: October 16, 1984Assignee: The United States of America as represented by the Secretary of AgricultureInventors: George C. Chen, Roger M. Rowell
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Patent number: 3985921Abstract: The reaction of cellulosic materials with butylene oxide under mildly alkaline conditions to increase resistance to fungi while improving dimensional stability. Wood is first dried and then submerged in a treating chamber containing a solution of butylene oxide and triethylamine. The chamber is heated and subjected to pressure, after which time the solution is drained and vacuum is applied to remove remaining excess reagent.Type: GrantFiled: June 18, 1975Date of Patent: October 12, 1976Assignee: The United States of America as represented by the Secretary of AgricultureInventors: Roger M. Rowell, David I. Gutzmer