Patents by Inventor Fred Lee Jackson
Fred Lee Jackson 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: 6110251Abstract: An improved gas filtration media with a lower initial pressure drop and increased dirt holding capacity includes a fibrous mat of randomly oriented meltblown polymeric fibers made from a polymer with between 0.2% and 10.0% by weight of: a) a nucleating agent to increase the rate of crystallization of the polymer forming the fibers and improve the heat sealability of media made from the fibers and/or b) an electrostatic charging enhancer to reduce surface tension of the polymer and inter-fiber attraction, as the fibers are cooled during formation and collection the fibers, to thereby facilitate the formation of the fibrous mat with discrete fibers. Preferably, the polymer is polypropylene, the nucleating agent is bis-benzylidene sorbitol, and electrostatic charging enhancer is a fatty acid.Type: GrantFiled: November 3, 1998Date of Patent: August 29, 2000Assignee: Johns Manville International, Inc.Inventors: Fred Lee Jackson, Patrick Lowry Pittman
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Patent number: 5993501Abstract: A composite filter media includes a fibrous filtration layer of randomly oriented fibers and one or more pleatable stiffening layers which enable the composite filter media to be pleated and hold or retain its pleats. The pleatable stiffening layer(s) may enhance the dirt holding capacity of the composite filter media especially when positioned upstream of the fibrous filtration layer. The composite filter media may also include a flexible covering layer which functions to block the loss of fibers from the fibrous filtration layer. Preferably, the mean fiber diameter of the fibers in fibrous filtration layer increases and the density of the fibrous filtration layer decreases throughout the thickness of the fibrous filtration layer from one major surface to the other major surface of the fibrous filtration layer.Type: GrantFiled: February 17, 1998Date of Patent: November 30, 1999Assignee: Johns Manville International, Inc.Inventors: Michael John Cusick, Fred Lee Jackson, Charles Francis Kern, Craig Donald DePorter
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Patent number: 5948344Abstract: A composite filter media includes a fibrous filtration layer of randomly oriented fibers and one or more pleatable stiffening layers which enable the composite filter media to be pleated and hold or retain its pleats. The pleatable stiffening layer(s) may enhance the dirt holding capacity of the composite filter media especially when positioned upstream of the fibrous filtration layer. The composite filter media may also include a flexible covering layer which functions to block the loss of fibers from the fibrous filtration layer. Preferably, the mean fiber diameter of the fibers in fibrous filtration layer increases and the density of the fibrous filtration layer decreases throughout the thickness of the fibrous filtration layer from one major surface to the other major surface of the fibrous filtration layer.Type: GrantFiled: February 17, 1998Date of Patent: September 7, 1999Assignee: Johns Manville International, Inc.Inventors: Michael John Cusick, Fred Lee Jackson, Charles Francis Kern, Craig Donald DePorter
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Patent number: 5800586Abstract: A composite filter media includes a fibrous filtration layer of randomly oriented fibers and one or more pleatable stiffening layers which enable the composite filter media to be pleated and hold or retain its pleats. The pleatable stiffening layer(s) may enhance the dirt holding capacity of the composite filter media especially when positioned upstream of the fibrous filtration layer. The composite filter media may also include a flexible covering layer which functions to block the loss of fibers from the fibrous filtration layer. Preferably, the mean fiber diameter of the fibers in fibrous filtration layer increases and the density of the fibrous filtration layer decreases throughout the thickness of the fibrous filtration layer from one major surface to the other major surface of the fibrous filtration layer.Type: GrantFiled: November 8, 1996Date of Patent: September 1, 1998Assignee: Johns Manville International, Inc.Inventors: Michael John Cusick, Fred Lee Jackson, Charles Francis Kern, Craig Donald DePorter
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Patent number: 5785725Abstract: A composite filter media for bag or pocket filters and the like includes an upstream dirt-holding layer of fine polymeric fibers and a downstream high efficiency filtration layer of glass fibers. The upstream layer includes polymeric microfibers having a mean fiber diameter ranging from about 2.5 to about 4.5 microns, lofting fibers and binder fibers; and weighs between about 2.0 and about 7.0 grams per square foot. The glass fiber layer has a weight between about 1.2 and about 2.7 grams per square foot; the average diameter of the fibers in the glass fiber layer is within a range from 3.0.times.10.sup.-5 to 4.1.times.10.sup.-5 inches; and the fibers are bonded together at their points of intersection with a binder. The composite filter media has an average air filtration efficiency of at least 80%.Type: GrantFiled: April 14, 1997Date of Patent: July 28, 1998Assignee: Johns Manville International, Inc.Inventors: Michael John Cusick, Fred Lee Jackson, Charles F. Kern
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Patent number: 5698298Abstract: A fibrous, non-woven thermal insulation comprises synthetic polymeric resin microfibers, staple fibers and bonding fibers which are randomly oriented and randomly intermingled in a single layer. The microfibers comprise between 0% and 95% by weight virgin synthetic polymeric resin and between 5% and 100% by weight recycled polyethylene teraphthalate. In one embodiment the microfibers have an average diameter between 1 to 10 microns and comprise between 5% and 80% by weight of the insulation; the staple fibers have an average diameter between 10 and 30 microns and comprise between 5% and 90% by weight of the insulation; and the bonding fibers have an average diameter between 0.9 and 15 denier and comprise between 5% and 95% by weight of the insulation. The bonding fibers have thermoplastic surfaces with a lower temperature softening point than the microfibers and staple fibers and bond the fibers together to form the insulation material.Type: GrantFiled: April 24, 1995Date of Patent: December 16, 1997Assignee: Schuller International, Inc.Inventors: Fred Lee Jackson, Kevin Patrick McHugh, John Stuart Robertson, Joseph Rumiesz, Jr.