Electrical devices comprising polymeric insulating or semiconducting members
Patent 5246783 Issued on September 21, 1993. Estimated Expiration Date: 
August 15, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 15, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesDielectric compositions comprising ethylene polymer stabilized against water treeing with epoxy containing organo silanes Supported polymerization catalyst Process for production of a high molecular weight ethylene a-olefin elastomer with a metallocene alumoxane catalyst Process and catalyst for producing reactor blend polyolefins Patent #: 4937299 InventorsAssigneeApplicationNo. 745479 filed on 08/15/1991US Classes:428/461, Next to addition polymer from unsaturated monomers174/110R, Insulated427/58, ELECTRICAL PRODUCT PRODUCED428/76, Complete cover or casing428/930, Electric superconducting526/943POLYMERIZATION WITH METALLOCENE CATALYSTSExaminersPrimary: Herbert, Thomas J. Jr.Attorney, Agent or FirmInternational ClassB32B 015/04AbstractDisclosed are electrically conductive and semiconductive devices utilizing polymers having resistance to water treeing and good dielectric properties. The polymer comprises ethylene polymerized with at least one C3 to C20 alpha-olefin and optionally at least one C3 to C20 polyene. The polymer utilized has a density in the range of about 0.86 g/cm3 to about 0.96 g/cm3, a melt index in the range of about 0.2 dg/min to about 100 dg/min, a molecular weight distribution in the range of about 1.5 to about 30, and a composition distribution breadth index greater than about 45 percent. For the polymer utilized, the tree rating is generally less than about 40, the power factor is in the range of about 0.0002 to about 0.0005, and the dielectric constant is in the range of about 1.8 to about 2.4.Field of SearchThree-membered chalcogen ringSilicon present in inorganic oxygen-containing compound Contains non-transition elemental metal, hydride thereof, or carbon to non-transition metal atom bond Component B metal is other than titanium or vanadium Next to addition polymer from unsaturated monomers Of metal Complete cover or casing Electric superconducting ELECTRICAL PRODUCT PRODUCED Insulated | |
