Patents by Inventor John C. Schubert
John C. Schubert 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: 5462794Abstract: Disclosed is a multi-layer sheet in a which a foamed thermpolastic core layer is extrusion coated with a multi-resin reclaim-containing layer, and an EVOH or acrylonitrile barrier layer is laminated to the multi-resin layer. The multi-resin layer is formulated to contain at least about 5 weight percent, and preferably about 8 to about 16 weight percent, based on the weight of the layer, of an adhesive resin to reduce the tendency of the barrier layer to delaminate from the multi-resin layer over time. The preferred adhesive is EMA.Type: GrantFiled: July 30, 1993Date of Patent: October 31, 1995Assignee: Amoco CorporationInventors: David C. Lindemann, Weilong L. Chiang, Melvin L. Luetkens, Jr., Robert D. Pischke, John C. Schubert
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Patent number: 5354402Abstract: A method of producing a thermoplastic foam sheet comprising the step of (a) foaming, by extrusion, a mixture comprising polystyrene and a thermoplastic reclaim material obtained from a multi-layer sheet manufacturing process, wherein said thermoplastic reclaim material comprises polystyrene and a thermoplastic barrier resin selected from the group consisting of (i) copolymers of ethylene and vinyl alcohol, and (ii) polymers comprising a copolymer of acrylonitrile, to produce a foam sheet having an upper and lower surface.Type: GrantFiled: June 21, 1993Date of Patent: October 11, 1994Assignee: Amoco CorporationInventors: Melvin L. Luetkens, Jr., Robert D. Pischke, John C. Schubert
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Patent number: 5221395Abstract: The invention comprises a method for producing the multi-layer sheets of the invention comprising extrusion coating multi-resin layers onto each side of the foam core layer and then lamination of a barrier film layer onto one of the multi-resin layers.Type: GrantFiled: June 3, 1992Date of Patent: June 22, 1993Assignee: Amoco CorporationInventors: Melvin L. Luetkens, Jr., Robert D. Pischke, John C. Schubert
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Patent number: 5128196Abstract: The invention comprises a multi-layer thermoplastic foam sheet comprising a thermoplastic foam layer adjacent to at least one multi-resin layer, preferably comprising a reclaim material mixture recycled from the sheet manufacturing process, and which comprises a thermoplastic barrier resin. In a preferred embodiment, the multi-layer sheet of the invention comprises a four major layer sheet comprising a barrier film layer which comprises a thermoplastic oxygen barrier resin; an inner mutli-resin reclaim layer comprising the oxygen barrier resin used in the barrier film layer; a foam core layer adjacent to the inner multi-resin reclaim layer; and an outer multi-resin reclaim layer, also comprising the oxygen barrier resin, as the other outer layer of the multi-layer sheet.Type: GrantFiled: March 16, 1990Date of Patent: July 7, 1992Assignee: Amoco CorporationInventors: Melvin L. Luetkens, Jr., Robert D. Pischke, John C. Schubert
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Patent number: 4878970Abstract: The method of improving the stiffness of a polystyrene foam cup having a generally closed cell foam sidewall and bottom and a solid plastic film coating on at least the outer surface thereof comprising placing said cup around a heated mandrel, said mandrel having an outside diameter sufficiently less than an inside diameter of said cup to allow the cup sidewall to expand, at a temperature and for a time sufficient to expand the sidewall.Type: GrantFiled: May 27, 1988Date of Patent: November 7, 1989Assignee: Amoco CorporationInventors: John C. Schubert, Edward C. Leduc
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Patent number: 4455272Abstract: Forming polystyrene foam by extruding polystyrene, nucleating agent, physical blowing agent, and water where the physical blowing agent and water are injected into extruder to provide blowing system. The product produced has small cells at junction points between membranes of the foam.Type: GrantFiled: March 29, 1982Date of Patent: June 19, 1984Assignee: Standard Oil Company (Indiana)Inventors: John C. Schubert, Edward C. LeDuc
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Patent number: 4363848Abstract: Laminate suitable for use as automobile trim panel or headliner comprising the following layers: (1) polypropylene fabric, (2) a solid layer comprising a physical mixture of a copolymer of styrene and maleic anhydride, preferably a rubber modified copolymer, and polypropylene and (3) a foam of a copolymer of styrene and maleic anhydride. The laminates can be shaped by thermoforming. Optionally the laminate can contain, on the foam side opposite the fabric, a sheet or film of a rubber modified copolymer of styrene and maleic anhydride.Type: GrantFiled: June 1, 1981Date of Patent: December 14, 1982Assignee: Standard Oil Company (Indiana)Inventors: Edward C. Le Duc, John C. Schubert
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Patent number: 4350730Abstract: A laminate suitable for use as a graphic arts board comprising two solid ABS resin sheets, said ABS resin containing a pigment and UV stabilizer, said solid sheets being fushion bonded to the upper and lower surfaces of a foam resin core containing polystyrene or a blend of polystyrene and ABS resin, a nucleating agent, and an antistatic agent on the surfaces of the laminate.Type: GrantFiled: October 16, 1981Date of Patent: September 21, 1982Assignee: Standard Oil Company (Indiana)Inventors: Stephen J. Cyr, John C. Schubert, John Dehlinger
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Patent number: 4253600Abstract: Container suitable for use in fast food operations which permits longer storage of food products therein while maintaining good quality. Projections are provided on the base of the container to permit air circulation between a prepared food product and prevent deterioration thereof.Type: GrantFiled: May 3, 1978Date of Patent: March 3, 1981Assignee: Standard Oil Company (Indiana)Inventor: John C. Schubert
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Patent number: 4150777Abstract: Container suitable for use in fast food operations which permits longer storage of food products therein while maintaining good quality. Projections are provided on the base of the container to permit air circulation between a prepared food product and prevent deterioration thereof.Type: GrantFiled: May 3, 1978Date of Patent: April 24, 1979Assignee: Standard Oil Company (Indiana)Inventors: Steven J. Cyr, John C. Schubert
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Patent number: 4026457Abstract: Improved automatic machine made heatsealed overwraps on trays with interior self-contained compartments are achieved by having the top surfaces of the dividers for said compartments progressively project above the top surfaces of outside walls.Type: GrantFiled: June 30, 1976Date of Patent: May 31, 1977Assignee: Standard Oil Company (Indiana)Inventor: John C. Schubert
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Patent number: 3996832Abstract: A hole punch having a curved cutting edge of generally the same contour as the surface being punched produces clean holes in wall of foamed plastic containers.Type: GrantFiled: April 10, 1975Date of Patent: December 14, 1976Assignee: Standard Oil Company (Indiana)Inventors: John C. Schubert, Charles B. Case
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Patent number: 3957940Abstract: In a process for extrusion coating of both sides of a foamed polystyrene sheet with a rubber modified polystyrene the specific improvement of crushing the coated foam sheet such that it will rebound to only 30 to 70 percent of its original thickness results in a product of improved processing characteristics. This crushed sheet can be thermally formed into a wrinkle free china-like surface useful in making insulated dishes, trays, food containers and the like.Type: GrantFiled: May 31, 1974Date of Patent: May 18, 1976Assignee: Standard Oil CompanyInventors: John C. Schubert, Edward C. Le Duc
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Patent number: 3935962Abstract: Locking means for a deformable plastic container having a top and bottom, such as foamed plastic food containers, which provides a positive closure but which does not interfere with stacking of empty containers, said means comprising on one part (generally the top) a protruding edge or lip which can engage an opening in the second member (generally the bottom), said opening being located in an inwardly protruding surface in a sidewall.Type: GrantFiled: November 20, 1974Date of Patent: February 3, 1976Assignee: Standard Oil CompanyInventors: John C. Schubert, Steven Cyr, Charles B. Case