Patents by Inventor Brent Willemsen
Brent Willemsen 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: 6214465Abstract: Granular absorbent products with low amounts of paper fiber are described. The absorbent products are made from recycled paper and include less than about 10% of paper fibers having a length sufficient to be retained on a 100 mesh screen. A process for making such granular absorbent products is also provided. The granular absorbents are useful for absorbing liquids spilled on the floor, and are crushable when walked on to provide greater resistance to slipping, and yet have a high resistance to attrition.Type: GrantFiled: July 20, 1999Date of Patent: April 10, 2001Assignee: Marcel Paper Mills, Inc.Inventors: Edward G. Knapick, Brent Willemsen, Ernest P. Wolfer
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Patent number: 6019873Abstract: Granular absorbent products with low amounts of paper fiber are described. The absorbent products are made from recycled paper and include less than about 10% of paper fibers having a length sufficient to be retained on a 100 mesh screen. A process for making such granular absorbent products is also provided. The granular absorbents are useful for absorbing liquids spilled on the floor, and are crushable when walked on to provide greater resistance to slipping, and yet have a high resistance to attrition.Type: GrantFiled: March 13, 1998Date of Patent: February 1, 2000Assignee: Marcal Paper Mills, Inc.Inventors: Edward G. Knapick, Brent Willemsen, Ernest P. Wolfer, Michael C. Bonin
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Patent number: 5951822Abstract: A process is disclosed which utilizes the "non-papermaking" portion of waste paper to produce a highly absorbent, essentially fiber-free granule which can be used, for example, as an agricultural chemical carrier. The process maximizes the amount of long (papermaking) fiber sent to the paper machine.The waste paper is broken up in a hydropulper, and the pulp stock is screened so that papermaking fibers are retained and sent forward to the papermaking process, and the solid material in the reject stream, such as kaolin clay and inorganic materials pass through a flotation clarifier to separate the solids. The slurry is then dewatered by means of a belt press to form a filter cake. The filter cake then enters a pin mixer where it is broken up into individual granules. The granules are then dried to a solids content of greater than 95%.Type: GrantFiled: June 19, 1997Date of Patent: September 14, 1999Assignee: Marcal Paper Mills, Inc.Inventors: Edward G. Knapick, Brent Willemsen, Ernest P. Wolfer
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Patent number: 5888345Abstract: Granular absorbent products with low amounts of paper fiber are described. The absorbent products are made from recycled paper and include less than about 10% of paper fibers having a length sufficient to be retained on a 100 mesh screen. A process for making such granular absorbent products is also provided. The granular absorbents are highly absorbent for water and oil even though they include only low amounts of paper fiber.Type: GrantFiled: September 15, 1997Date of Patent: March 30, 1999Assignee: Marcal Paper Mills, Inc.Inventors: Edward G. Knapick, Brent Willemsen, Ernest P. Wolfer
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Patent number: 5882480Abstract: A process is disclosed which utilizes the "non-papermaking" portion of waste paper to produce a highly absorbent, essentially fiber-free granule which can be used, for example, as an agricultural chemical carrier. The process maximizes the amount of long (papermaking) fiber sent to the paper machine. The waste paper is broken up in a hydropulper, and the pulp stock is screened so that papermaking fibers are retained and sent forward to the papermaking process, and the solid material in the reject stream, such as kaolin clay and inorganic materials pass through a flotation clarifier to separate the solids. The slurry is then dewatered by means of a belt press to form a filter cake. The filter cake then enters a pin mixer where it is broken up into individual granules. The granules are then dried to a solids content of greater than 95%.Type: GrantFiled: May 7, 1997Date of Patent: March 16, 1999Assignee: Marcal Paper Mills, Inc.Inventors: Edward G. Knapick, Brent Willemsen, Ernest P. Wolfer
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Patent number: 5807465Abstract: A process is disclosed which utilizes the "non-papermaking" portion of waste paper to produce a highly absorbent, essentially fiber-free granule which can be used, for example, as an agricultural chemical carrier. The process maximizes the amount of long (papermaking) fiber sent to the paper machine. The waste paper is broken up in a hydropulper, and the pulp stock is screened so that papermaking fibers are retained and sent forward to the papermaking process, and the solid material in the reject stream, such as kaolin clay and inorganic materials pass through a flotation clarifier to separate the solids. The slurry is then dewatered by means of a belt press to form a filter cake. The filter cake then enters a pin mixer where it is broken up into individual granules. The granules are then dried to a solids content of greater than 95%.Type: GrantFiled: May 16, 1997Date of Patent: September 15, 1998Assignee: Marcal Paper Mills, Inc.Inventors: Edward G. Knapick, Brent Willemsen, Ernest P. Wolfer
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Patent number: 5728270Abstract: In a process for making a granular material from a reject stream from a coated grade waste paper pulp stock recycling process, the pulp stock is screened so that the reject stream passes through a screen and long fibers are retained for use in making paper. Solid material in the reject stream is separated by flotation. Water is removed from the reject stream to increase its consistency to that of modelling clay. The reject stream is supplied to an agglomerator which forms uniform granules of irregular but approximately spherical shape. The granules are then dried so that the granules have a solids content greater than 95%. Apparatus for performing the process and characteristics of granular material formed by the process and apparatus are also described.Type: GrantFiled: November 18, 1996Date of Patent: March 17, 1998Assignee: Marcal Paper Mills, Inc.Inventors: Edward G. Knapick, Brent Willemsen, Ernest P. Wolfer
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Patent number: 5622600Abstract: In a process for making a particulate or granular material from a reject stream from a coated grade waste paper pulp stock recycling process, fibers for use in making paper are removed, the remaining solid material in the reject stream is dyed and then separated. Water is removed from the reject stream to increase its consistency and form dyed particles or granules. The process and characteristics of particulate and granular material formed by the process are described.Type: GrantFiled: June 7, 1995Date of Patent: April 22, 1997Assignee: Marcal Paper Mills, Inc.Inventors: Kim A. Smith, Edward G. Knapick, Brent Willemsen, Ernest P. Wolfer
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Patent number: 5593542Abstract: A method for recovering fiber useful for papermaking from an effluent stream includes a primary process for treating an effluent stream to separate usable fiber from contrary matter, and secondary operations, supplementing the primary process, to treat the contrary matter rejected by the primary process to recover usable fibers contained in the reject matter. In addition, the secondary processing steps separate the reject material into organic and inorganic fractions, which may be usable in other processes. The method of the invention does not require the addition of water as do conventional processes, simplifies handling, disposal, and reduces the costs of disposal.Type: GrantFiled: May 8, 1995Date of Patent: January 14, 1997Assignee: Marcal Paper Mills, Inc.Inventors: Ernest P. Wolfer, Brent Willemsen, Venkat B. Maroju, Andres Martiny