Patents Assigned to Jim Walter Resources, Inc.
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Patent number: 4954018Abstract: This invention relates to a rib bolt assembly including a collapsible yield device located between an exposed end of the rib bolt and a side of a mine pillar in which the collapsible yield device will withstand a predetermined torque but will collapse at a stress less than the failure strength of the rib bolt.Type: GrantFiled: January 15, 1987Date of Patent: September 4, 1990Assignee: Jim Walter Resources, Inc.Inventor: Michael Gauna
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Patent number: 4714717Abstract: A polyester polyol suitable for use in a foam-forming reaction with an organic polyisocyanate in the manufacture of a polyurethane or polyisocyanurate foam, the polyester polyol being the reaction product of polycarboxylic acid and polyol components, wherein the polyol component comprises(a) at least one alkylene glycol of the formula:HO--R.sub.1 --OHwherein R.sub.1 is a straight or branched chain alkylene group having two to five carbon atoms, and is unsubstituted or substituted by at least one member selected from the group consisting of halogen, hydroxy, nitro and amino,(b) at least one higher alkylene glycol, and(c) optionally at least one additional polyol.Type: GrantFiled: April 6, 1987Date of Patent: December 22, 1987Assignee: Jim Walter Resources, Inc.Inventors: Michael E. Londrigan, Michael J. Skowronski
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Patent number: 4652591Abstract: A polyester polyol mixture is prepared by reacting a polycarboxylic acid component-containing polyol with a terephthalic acid residue, wherein the polycarboxylic acid component has ring units with two ##STR1## groups on adjacent or alternate ring positions, the ring unit content of the polycarboxylic acid component being sufficient for viscosity reduction of the polyester polyol mixture. The polyester polyol mixture is useful in the preparation of cellular foam materials, particularly polyisocyanurate and polyurethane foams, and laminates thereof.Type: GrantFiled: November 12, 1985Date of Patent: March 24, 1987Assignee: Jim Walter Resources, Inc.Inventor: Michael E. Londrigan
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Patent number: 4607568Abstract: This invention pertains to an extensible line brattice which comprises a track system and an extensible brattice frame with an attached brattice cloth cover mounted on said track system for extension into an unprotected portion of a mine passageway.Type: GrantFiled: August 7, 1985Date of Patent: August 26, 1986Assignee: Jim Walter Resources, Inc.Inventors: George R. Hill, Larry C. Jordan
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Unsaturated polyoxyalkylene adduct/fumarate diester reaction product for cellular foam stabilization
Patent number: 4572919Abstract: Polyoxyalkylene surfactants for cellular foams can be prepared by reacting under free radical polymerization conditions (1) an unsaturated polyoxyalkylene adduct and (2) an esterified unsaturated dibasic acid ingredient, wherein unsaturated diester ingredient (2) either completely or partially comprises a fumarate diester.Type: GrantFiled: February 15, 1985Date of Patent: February 25, 1986Assignee: Jim Walter Resources, Inc.Inventor: Michael E. Londrigan -
Patent number: 4548087Abstract: This invention pertains to a device for taking samples of finely crushed particulate matter, such as coal from a flowing feed stream on a preset selection schedule, using a rotating drum which has one slot in its periphery and a receptable moveable into and out of the center area of the drum in alignment with said slot.Type: GrantFiled: July 5, 1984Date of Patent: October 22, 1985Assignee: Jim Walter Resources, Inc.Inventor: William R. Huck
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Patent number: 4539341Abstract: A storage stable polyester polyol mixture is prepared by digesting polyalkylene terephthalate, particularly polyethylene terephthalate, with a digesting medium comprising a polycarboxylic acid component-containing polyol, wherein the polycarboxylic acid component has ring units with two ##STR1## groups on adjacent or alternate ring positions, the ring unit content of the polycarboxylic acid component being sufficient for improved storage stability of the digestion product. The polyester polyol mixture is useful in the preparation of cellular foam materials, particularly polyisocyanurate and polyurethane foams.Type: GrantFiled: February 22, 1984Date of Patent: September 3, 1985Assignee: Jim Walter Resources, Inc.Inventors: Richard K. Hallmark, Michael J. Skowronski, William D. Stephens
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Patent number: 4534679Abstract: A combination expansion shell and resin secured anchor assembly for installation in a mine roof opening including an elongated bolt having rebar attached to the upper end thereof and an expansion shell below the rebar. The assembly is inserted into a mine roof opening in the back end of which is positioned a resin and catalyst cartridge, the cartridge being ruptured by the rebar, allowing the resin and catalyst to gravitate downwardly between the opening wall and rebar, where they are mixed upon rotation of the bolt and rebar. The bolt is rotated a predetermined number of revolutions to obtain optimum mixing of the resin and catalyst, after which continued rotation of the bolt in the same direction causes outward movement of the expansion shell into gripping engagement with the mine roof.Type: GrantFiled: November 1, 1984Date of Patent: August 13, 1985Assignees: Birmingham Bolt Company, Jim Walter Resources, Inc.Inventors: Claude C. White, Frederick Carr
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Patent number: 4534680Abstract: A combination expansion shell and resin secured anchor assembly for installation in a mine roof opening including an elongated bolt having rebar attached to the upper end thereof and an expansion shell below the rebar. The assembly is inserted into a mine roof opening in the back end of which is positioned a resin and catalyst cartridge, the cartridge being ruptered by the rebar, allowing the resin and catalyst to gravitate downwardly between the opening wall and rebar, where they are mixed upon rotation of the bolt and rebar. The bolt is rotated a predetermined number of revolutions to obtain optimum mixing of the resin and catalyst, after which continued rotation of the bolt in the same direction causes outward movement of the expansion shell into gripping engagement with the mine roof.Type: GrantFiled: November 1, 1984Date of Patent: August 13, 1985Assignees: Birmingham Bolt Company, Jim Walter Resources, Inc.Inventors: Claude C. White, Frederick Carr
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Unsaturated polyoxyalkylene adduct/fumarate diester reaction product for cellular foam stabilization
Patent number: 4529745Abstract: Polyoxyalkylene surfactants for cellular foams can be prepared by reacting under free radical polymerization conditions (1) an unsaturated polyoxyalkylene adduct and (2) an esterified unsaturated dibasic acid ingredient, wherein unsaturated diester ingredient (2) either completely or partially comprises a fumarate diester.Type: GrantFiled: May 2, 1983Date of Patent: July 16, 1985Assignee: Jim Walter Resources, Inc.Inventor: Michael E. Londrigan -
Patent number: 4347020Abstract: A mine roof bolt assembly including a shank having anchoring means at one end for securing the shank in the back of the bore, the opposite end of the shank being threaded. A bolt head having a central bore, includes a first threaded bore portion threadedly engaged with the threaded end of the shank. A stop plug is threaded into a second threaded bore portion in the bolt head and abuts an end of the shank to initially limit penetration of the shank into the bore of the head. The bolt head is rotated by rotational means having a predetermined torque limit, moving the head longitudinally with respect to the shank, exerting a force on the stop plug which strips the threads from the second threaded bore portion, thereby permitting uninterrupted passage of the shank through the bore. A roof plate positioned on the shank between the bolt head and roof is then forced upwardly by the head into supporting engagement with the mine roof, and the predetermined torque of the rotational means is established.Type: GrantFiled: January 2, 1980Date of Patent: August 31, 1982Assignees: Birmingham Bolt Company, Jim Walter Resources, Inc.Inventors: Claude C. White, Frederick Carr
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Patent number: 4124730Abstract: The present invention concerns a novel method of making short silane treated inorganic glass fibers and mineral wool fibers with a very low shot content and the fibers thus produced.Type: GrantFiled: May 27, 1977Date of Patent: November 7, 1978Assignee: Jim Walter Resources, Inc.Inventors: Frank D. Albert, Alan P. Conroy, David L. Skinner
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Patent number: 4069220Abstract: A process has been developed for producing complexes of phenol or phenolic compounds and hexamethylenetetramine by mixing the ingredients with only enough water, or other suitable solvent, to promote the reaction. Heat liberated by the reaction is controlled by cooling the mixing chamber, and drying is accomplished by removing the small amount of solvent in conventional type dryers.Type: GrantFiled: September 21, 1976Date of Patent: January 17, 1978Assignee: Jim Walter Resources, Inc.Inventors: Henry Philip Orem, David R. Hart, Jerry E. Hill