Patents Assigned to Charleswater Products, Inc.
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Patent number: 4662514Abstract: A transparent polymeric container, such as a dual in line or slide tube, for the storage, transportation or handling of static sensitive semi-conductive microchips or electronic devices, which tube comprises: a dual in line polymeric transparent tube for the storage or transportation of static sensitive microchips or integrated circuits, which tube has been treated with an electrically conductive surface coating composition composed of a film-forming polymer and a quaternary ammonium compound as an antistatic agent to provide a surface electrical resistance of the treated tube of about 10.sup.8 ohm/sq. inch or less.Type: GrantFiled: April 17, 1985Date of Patent: May 5, 1987Assignee: Charleswater Products, Inc.Inventor: George R. Berbeco
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Patent number: 4645717Abstract: A treating solution for use in impregnating a paper sheet material useful in the preparation of electrically conductive high-pressure thermoset laminates, which treating solution comprises in combination: an aqueous resin solution which includes a heat-curable thermosetting formaldehyde-type resin; and, an electrically conductive amount of a quaternary ammonium compound sufficient to impart an electrical resistivity of about 10.sup.10 ohms per square inch or less to the impregnated thermoset paper sheet material.Type: GrantFiled: February 4, 1986Date of Patent: February 24, 1987Assignee: Charleswater Products, Inc.Inventor: George R. Berbeco
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Patent number: 4596668Abstract: An electrically-conductive surface-coating composition for use in application as a floor coating to provide electrostatic discharge protection which composition comprises: an emulsion of a film-forming water-soluble low-molecular-weight polyampholyte polymer containing free carboxylic groups and carboxylic amino ester groups and an effective amount of an antistatic agent such as a quaternary ammonium salt to provide a floor surface which has a surface resistance of about 10.sup.9 ohm/square or less.Type: GrantFiled: November 1, 1983Date of Patent: June 24, 1986Assignee: Charleswater Products, Inc.Inventor: George R. Berbeco
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Patent number: 4589954Abstract: A fibrous sheet material suitable for use in a high-pressure laminate of improved electrical conductivity, which fibrous sheet material comprises a dried paper sheet material saturated with a heat-curable thermoset resin, and an electrically conductive amount of a quaternary ammonium compound.Type: GrantFiled: April 20, 1984Date of Patent: May 20, 1986Assignee: Charleswater Products, Inc.Inventor: George R. Berbeco
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Patent number: 4455350Abstract: A static-dissipating, synthetic surface-covering sheet laminate material which comprises a plurality of cured, resin-saturated paper sheet materials laminated together under heat and pressure, and which includes a resin-saturated and cured top sheet material having an electrically conductive amount of a polyalkylene glycol, to provide a surface resistivity of the sheet laminate material of about 100 ohms per square inch or less, when tested in accordance with ASTM-0257.Type: GrantFiled: November 17, 1982Date of Patent: June 19, 1984Assignee: Charleswater Products, Inc.Inventor: George R. Berbeco
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Patent number: 4454199Abstract: A static-dissipating conductive synthetic surface-covering highpressure sheet laminate material which comprises a plurality of cured, resin-saturated paper sheet materials laminated together under heat and pressure, and which includes a resin-saturated cured top sheet material having an electrically conductive amount of a quaternary ammonium compound to provide a surface resistivity of the sheet laminate material of about 10.sup.9 ohms per square inch or less, when tested in accordance with ASTM-D257.Type: GrantFiled: January 25, 1983Date of Patent: June 12, 1984Assignee: Charleswater Products, Inc.Inventor: George R. Berbeco
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Patent number: 4301040Abstract: A static-free, polymeric surface mat to prevent the accumulation of static charge, particularly in the packaging and handling of electronic components and devices, which mat comprises a nonconductive, synthetic-material layer with a top surface, optionally an adhesive layer on the bottom surface of the synthetic material, and a solid or foam layer of a conductive material, such as an open-cell urethane foam impregnated with finely-divided conductive particles, and a film-forming binder material to secure the particles uniformly onto the foam.Type: GrantFiled: June 19, 1980Date of Patent: November 17, 1981Assignee: Charleswater Products, Inc.Inventor: George R. Berbeco
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Patent number: 4231901Abstract: An article of manufacture which comprises a urethane foam characterized by electrically conductive properties to prevent the accumulation of static charge on electronic components or devices which are placed on or wrapped in the foam or alternatively electronic devices in which the electronic leads, themselves, are inserted in an electrically conductive relationship into the foam. The urethane foam contains a binding agent and is impregnated generally uniformly therethrough with an electrically conductive amount of an electrically conductive particulate material.Type: GrantFiled: June 23, 1978Date of Patent: November 4, 1980Assignee: Charleswater Products, Inc.Inventor: George R. Berbeco
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Patent number: 4150418Abstract: An article on manufacture which comprises footwear characterized by electrically conductive properties to prevent the accumulation of static charge on the footwear by the user thereof in a hazardous environment, which footwear includes a thin, flexible, nonwoven, fibrous sheet material containing a binding agent for the fibers, and impregnated generally uniformly therethrough with an electrically conductive amount of an electrically conductive particulate material.Type: GrantFiled: August 12, 1977Date of Patent: April 17, 1979Assignee: Charleswater Products, Inc.Inventor: George R. Berbeco