Patents by Inventor Douglas K. Finnemore
Douglas K. Finnemore 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).
-
Patent number: 6591119Abstract: A process to produce magnesium diboride objects from boron objects with a similar form is presented. Boron objects are reacted with magnesium vapor at a predetermined time and temperature to form magnesium diboride objects having a morphology similar to the boron object's original morphology.Type: GrantFiled: October 21, 2002Date of Patent: July 8, 2003Assignee: Iowa State University Research FoundationInventors: Douglas K. Finnemore, Paul C. Canfield, Sergey L. Bud'ko, Jerome E. Ostenson, Cedomir Petrovic, Charles E. Cunningham, Gerard Lapertot
-
Publication number: 20030099871Abstract: A process to produce magnesium diboride objects from boron objects with a similar form is presented. Boron objects are reacted with magnesium vapor at a predetermined time and temperature to form magnesium diboride objects having a morphology similar to the boron object's original morphology.Type: ApplicationFiled: October 21, 2002Publication date: May 29, 2003Applicant: Iowa State University Research FoundationInventors: Douglas K. Finnemore, Paul C. Canfield, Sergey L. Bud'ko, Jerome E. Ostenson, Cedomir Petrovic, Charles E. Cunningham, Gerard Lapertot
-
Patent number: 6514557Abstract: A process to produce magnesium diboride objects from boron objects with a similar form is presented. Boron objects are reacted with magnesium vapor at a predetermined time and temperature to form magnesium diboride objects having a morphology similar to the boron object's original morphology.Type: GrantFiled: August 24, 2001Date of Patent: February 4, 2003Assignee: Iowa State University Research FoundationInventors: Douglas K. Finnemore, Paul C. Canfield, Sergey L. Bud'ko, Jerome E. Ostenson, Cedomir Petrovic, Charles E. Cunningham, Gerard Lapertot
-
Publication number: 20020111275Abstract: A process to produce magnesium diboride objects from boron objects with a similar form is presented. Boron objects are reacted with magnesium vapor at a predetermined time and temperature to form magnesium diboride objects having a morphology similar to the boron object's original morphology.Type: ApplicationFiled: August 24, 2001Publication date: August 15, 2002Inventors: Douglas K. Finnemore, Paul C. Canfield, Sergey L. Bud'ko, Jerome E. Ostenson, Cedomir Petrovic, Charles E. Cunningham, Gerard Lapertot
-
Patent number: 5330969Abstract: A strain tolerant multifilamentary wire capable of carrying superconducting currents is provided comprising a plurality of discontinuous filaments formed from a high temperature superconducting material. The discontinuous filaments have a length at least several orders of magnitude greater than the filament diameter and are sufficiently strong while in an amorphous state to withstand compaction. A normal metal is interposed between and binds the discontinuous filaments to form a normal metal matrix capable of withstanding heat treatment for converting the filaments to a superconducting state. The geometry of the filaments within the normal metal matrix provides substantial filament-to-filament overlap, and the normal metal is sufficiently thin to allow supercurrent transfer between the overlapped discontinuous filaments but is also sufficiently thick to provide strain relief to the filaments.Type: GrantFiled: November 24, 1992Date of Patent: July 19, 1994Assignee: Iowa State University Research Foundation, Inc.Inventors: Douglas K. Finnemore, Theodore A. Miller, Jerome E. Ostenson, Louis A. Schwartzkopf, Steven C. Sanders
-
Patent number: 5306704Abstract: An improved method for the efficient incorporation of a metal such as silver in a superconducting material includes blending the metal with a high temperature superconductor or precursor powder and consolidating the same into pellets. The pellets are charged directly into a heating assembly where it is melted and heated sufficiently to a uniform temperature prior to fiberization. Droplets of the melted blend fall through a collar into a nozzle where they are subjected to a high velocity gas to break the melted material into ligaments which solidify into improved flexible fibers having the metal homogeneously disThis invention was made with Government support under a contract with the Department of Energy (DOE) and Ames Laboratory, Contract No. SC-91-225, our reference No. CRD-1272. The Government has certain rights in this invention.Type: GrantFiled: July 29, 1992Date of Patent: April 26, 1994Assignee: The Babcock & Wilcox CompanyInventors: Richard A. Gleixner, Dale F. LaCount, Douglas K. Finnemore
-
Patent number: 5189260Abstract: A strain tolerant microfilamentary wire capable of carrying superconducting currents is provided comprising a plurality of discontinuous filaments formed from a high temperature superconducting material. The discontinuous filaments have a length at least several orders of magnitude greater than the filament diameter and are sufficiently strong while in an amorphous state to withstand compaction. A normal metal is interposed between and binds the discontinuous filaments to form a normal metal matrix capable of withstanding heat treatment for converting the filaments to a superconducting state. The geometry of the filaments within the normal metal matrix provides substantial filament-to-filament overlap, and the normal metal is sufficiently thin to allow supercurrent transfer between the overlapped discontinuous filaments but is also sufficiently thick to provide strain relief to the filaments.Type: GrantFiled: February 6, 1991Date of Patent: February 23, 1993Assignee: Iowa State University Research Foundation, Inc.Inventors: Douglas K. Finnemore, Theodore A. Miller, Jerome E. Ostenson, Louis A. Schwartzkopf, Steven C. Sanders
-
Patent number: 4970194Abstract: Fibers of YBa.sub.2 Cu.sub.3 O.sub.x have been produce by pendant drop melt extraction. This technique involves the end of a rod of YBa.sub.2 Cu.sub.3 O.sub.x melted with a hydrogen-oxygen torch, followed by lowering onto the edge of a spinning wheel. The fibers are up to 10 cm in length with the usual lateral dimensions, ranging from 20 .mu.m to 125 .mu.m. The fibers require a heat treatment to make them superconducting.Type: GrantFiled: July 21, 1989Date of Patent: November 13, 1990Assignee: Iowa State University Research FoundationInventors: Louis A. Schwartzkopf, Jerome E. Ostenson, Douglas K. Finnemore
-
Patent number: 4818304Abstract: This invention comprises a method of increasing the magnetostrictive response of rare earth-iron (RFe) magnetostrictive alloy rods by a thermal-magnetic treatment. The rod is heated to a temperature above its Curie temperature, viz. from 400.degree. to 600.degree. C.; and, while the rod is at that temperature, a magnetic field is directionally applied and maintained while the rod is cooled, at least below its Curie temperature.Type: GrantFiled: October 20, 1987Date of Patent: April 4, 1989Assignee: Iowa State University Research Foundation, Inc.Inventors: John D. Verhoeven, O. Dale McMasters, Edwin D. Gibson, Jerome E. Ostenson, Douglas K. Finnemore
-
Patent number: 4532703Abstract: An improved method of preparing composite multifilament superconducting wire of Nb.sub.3 Sn in a copper matrix which eliminates the necessity of coating the drawn wire with tin. A generalized cylindrical billet of an alloy of copper containing at least 15 weight percent niobium, present in the copper as discrete, randomly distributed and oriented dendritic-shaped particles, is provided with at least one longitudinal opening which is filled with tin to form a composite drawing rod. The drawing rod is then drawn to form a ductile composite multifilament wire containing a filament of tin. The ductile wire containing the tin can then be wound into magnet coils or other devices before heating to diffuse the tin through the wire to react with the niobium forming Nb.sub.3 Sn. Also described is an improved method for making large billets of the copper-niobium alloy by consumable-arc casting.Type: GrantFiled: April 24, 1981Date of Patent: August 6, 1985Assignee: The United States of America as represented by the United States Department of EnergyInventors: John D. Verhoeven, Edwin D. Gibson, Douglas K. Finnemore, Jerome E. Ostenson, Frederick A. Schmidt, Charles V. Owen
-
Patent number: 4378330Abstract: An alloy for the commercial production of ductile superconducting wire is prepared by melting together copper and at least 15 weight percent niobium under non-oxygen-contaminating conditions, and rapidly cooling the melt to form a ductile composite consisting of discrete, randomly distributed and orientated dendritic-shaped particles of niobium in a copper matrix. As the wire is worked, the dendritric particles are realigned parallel to the longitudinal axis and when drawn form a plurality of very fine ductile superconductors in a ductile copper matrix. The drawn wire may be tin coated and wound into magnets or the like before diffusing the tin into the wire to react with the niobium. Impurities such as aluminum or gallium may be added to improve upper critical field characteristics.Type: GrantFiled: March 12, 1979Date of Patent: March 29, 1983Assignee: The United States of America as represented by the Department of EnergyInventors: John D. Verhoeven, Douglas K. Finnemore, Edwin D. Gibson, Jerome E. Ostenson