Patents by Inventor Frederick J. Walker
Frederick J. Walker 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: 6652989Abstract: A crystalline oxide-on-semiconductor structure and a process for constructing the structure involves a substrate of silicon, germanium or a silicon-germanium alloy and an epitaxial thin film overlying the surface of the substrate wherein the thin film consists of a first epitaxial stratum of single atomic plane layers of an alkaline earth oxide designated generally as (AO)n and a second stratum of single unit cell layers of an oxide material designated as (A′BO3)m so that the multilayer film arranged upon the substrate surface is designated (AO)n(A′BO3)m wherein n is an integer repeat of single atomic plane layers of the alkaline earth oxide AO and m is an integer repeat of single unit cell layers of the A′BO3 oxide material. Within the multilayer film, the values of n and m have been selected to provide the structure with a desired electrical structure at the substrate/thin film interface that can be optimized to control band offset and alignment.Type: GrantFiled: July 20, 2001Date of Patent: November 25, 2003Assignee: UT-Battelle, LLCInventors: Rodney A. McKee, Frederick J. Walker
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Patent number: 6511544Abstract: A process and system for use during the growth of a thin film upon the surface of a substrate by exposing the substrate surface ti vaporized material in a high vacuum (HV) facility involves the directing of an electron beam generally toward the surface of the substrate as the substrate is exposed to vaporized material so that electrons are diffracted from the substrate surface by the beam and the monitoring of the pattern of electrons diffracted from the substrate surfaces as vaporized material settles upon the substrate surface. When the monitored pattern achieves a condition indicative of the desired condition of the thin film being grown upon the substrate, the exposure of the substrate to the vaporized materials is shut off of otherwise adjusted. To facilitate the adjustment of the crystallographic orientation of the film relative to the electron beam, the system includes a mechanism for altering the orientation of the surface of the substrate relative to the electron beam.Type: GrantFiled: July 30, 2001Date of Patent: January 28, 2003Assignee: UT-Battelle, LLCInventors: Rodney A. McKee, Frederick J. Walker
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Publication number: 20010051399Abstract: A process and system for use during the growth of a thin film upon the surface of a substrate by exposing the substrate surface to vaporized material in a high vacuum (HV) facility involves the directing of an electron beam generally toward the surface of the substrate as the substrate is exposed to vaporized material so that electrons are diffracted from the substrate surface by the beam and the monitoring of the pattern of electrons diffracted from the substrate surface as vaporized material settles upon the substrate surface. When the monitored pattern achieves a condition indicative of the desired condition of the thin film being grown upon the substrate, the exposure of the substrate to the vaporized materials is shut off or otherwise adjusted. To facilitate the adjustment of the crystallographic orientation of the film relative to the electron beam, the system includes a mechanism for altering the orientation of the surface of the substrate relative to the electron beam.Type: ApplicationFiled: July 30, 2001Publication date: December 13, 2001Applicant: Lockheed Martin Energy Research CorporationInventors: Rodney A. McKee, Frederick J. Walker
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Publication number: 20010049029Abstract: A crystalline oxide-on-semiconductor structure and a process for constructing the structure involves a substrate of silicon, germanium or a silicon-germanium alloy and an epitaxial thin film overlying the surface of the substrate wherein the thin film consists of a first epitaxial stratum of single atomic plane layers of an alkaline earth oxide designated generally as (AO)n and a second stratum of single unit cell layers of an oxide material designated as (A′BO3)m so that the multilayer film arranged upon the substrate surface is designated (AO)n(A′BO3)m wherein n is an integer repeat of single atomic plane layers of the alkaline earth oxide AO and m is an integer repeat of single unit cell layers of the A′BO3 oxide material. Within the multilayer film, the values of n and m have been selected to provide the structure with a desired electrical structure at the substrate/thin film interface that can be optimized to control band offset and alignment.Type: ApplicationFiled: July 20, 2001Publication date: December 6, 2001Applicant: UT-Battelle, LLCInventors: Rodney A. McKee, Frederick J. Walker
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Patent number: 6306668Abstract: A process and system for use during the growth of a thin film upon the surface of a substrate by exposing the substrate surface to vaporized material in a high vacuum (HV) facility involves the directing of an electron beam generally toward the surface of the substrate as the substrate is exposed to vaporized material so that electrons are diffracted from the substrate surface by the beam and the monitoring of the pattern of electrons diffracted from the substrate surface as vaporized material settles upon the substrate surface. When the monitored pattern achieves a condition indicative of the desired condition of the thin film being grown upon the substrate, the exposure of the substrate to the vaporized materials is shut off or otherwise adjusted. To facilitate the adjustment of the crystallographic orientation of the film relative to the electron beam, the system includes a mechanism for altering the orientation of the surface of the substrate relative to the electron beam.Type: GrantFiled: September 23, 1999Date of Patent: October 23, 2001Assignee: UT-Battelle, LLCInventors: Rodney A. McKee, Frederick J. Walker
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Patent number: 6287710Abstract: A process for growing a crystalline oxide epitaxially upon the surface of a Group IV semiconductor, as well as a structure constructed by the process, is described. The semiconductor can be germanium or silicon, and the crystalline oxide can generally be represented by the formula (AO)n(A′BO3)m in which “n” and “m” are non-negative integer repeats of planes of the alkaline earth oxides or the alkaline earth-containing perovskite oxides. With atomic level control of interfacial thermodynamics in a multicomponent semiconductor/oxide system, a highly perfect interface between a semiconductor and a crystalline oxide can be obtained.Type: GrantFiled: August 28, 2000Date of Patent: September 11, 2001Assignee: UT-Battelle, LLCInventors: Rodney A. McKee, Frederick J. Walker, Matthew F. Chisholm
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Patent number: 6143072Abstract: A process for growing a crystalline oxide epitaxially upon the surface of a Group IV semiconductor, as well as a structure constructed by the process, is described. The semiconductor can be germanium or silicon, and the crystalline oxide can generally be represented by the formula (AO).sub.n (A'BO.sub.3).sub.m in which "n" and "m" are non-negative integer repeats of planes of the alkaline earth oxides or the alkaline earth-containing perovskite oxides. With atomic level control of interfacial thermodynamics in a multicomponent semiconductor/oxide system, a highly perfect interface between a semiconductor and a crystalline oxide can be obtained.Type: GrantFiled: April 6, 1999Date of Patent: November 7, 2000Assignee: UT-Battelle, LLCInventors: Rodney A. McKee, Frederick J. Walker, Matthew F. Chisholm
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Patent number: 6080235Abstract: A monolithic crystalline structure and a method of making involves a semiconductor substrate, such as silicon, and a ferroelectric film, such as BaTiO.sub.3, overlying the surface of the substrate wherein the atomic layers of the ferroelectric film directly overlie the surface of the substrate. By controlling the geometry of the ferroelectric thin film, either during build-up of the thin film or through appropriate treatment of the thin film adjacent the boundary thereof, the in-plane tensile strain within the ferroelectric film is relieved to the extent necessary to permit the ferroelectric film to be poled out-of-plane, thereby effecting in-plane switching of the polarization of the underlying substrate material.Type: GrantFiled: June 3, 1997Date of Patent: June 27, 2000Assignee: UT-Battelle, LLCInventors: Rodney A. McKee, Frederick J. Walker
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Patent number: 5656634Abstract: Compounds of the formula ##STR1## the pharmaceutically acceptable salts thereof, wherein Q and R.sup.1 are as defined below, and novel carboxylic acid and acid halide intermediates used in the synthesis of such compounds. The compounds of formula I are inhibitors of acyl coenzyme A: cholesterol acyltransferase (ACAT) and are useful as hypolipidemic and antiatherosclerosis agents.Type: GrantFiled: May 31, 1994Date of Patent: August 12, 1997Assignee: Pfizer Inc.Inventors: George Chang, Ernest S. Hamanaka, Peter A. McCarthy, Thien V. Truong, Frederick J. Walker
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Patent number: 5482003Abstract: A process and structure involving a silicon substrate utilize molecular beam epitaxy (MBE) and/or electron beam evaporation methods and an ultra-high vacuum facility to grow a layup of epitaxial alkaline earth oxide films upon the substrate surface. By selecting metal constituents for the oxides and in the appropriate proportions so that the lattice parameter of each oxide grown closely approximates that of the substrate or base layer upon which oxide is grown, lattice strain at the film/film or film/substrate interface of adjacent films is appreciably reduced or relieved.Type: GrantFiled: July 6, 1993Date of Patent: January 9, 1996Assignee: Martin Marietta Energy Systems, Inc.Inventors: Rodney A. McKee, Frederick J. Walker
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Patent number: 5450812Abstract: A process and structure wherein a film comprised of a perovskite or a spinel is built epitaxially upon a surface, such as an alkaline earth oxide surface, involves the epitaxial build up of alternating constituent metal oxide planes of the perovskite or spinel. The first layer of metal oxide built upon the surface includes a metal element which provides a small cation in the crystalline structure of the perovskite or spinel, and the second layer of metal oxide built upon the surface includes a metal element which provides a large cation in the crystalline structure of the perovskite or spinel. The layering sequence involved in the film build up reduces problems which would otherwise result from the interfacial electrostatics at the first atomic layers, and these oxides can be stabilized as commensurate thin films at a unit cell thickness or grown with high crystal quality to thicknesses of 0.5-0.7 .mu.m for optical device applications.Type: GrantFiled: December 8, 1993Date of Patent: September 19, 1995Assignee: Martin Marietta Energy Systems, Inc.Inventors: Rodney A. McKee, Frederick J. Walker
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Patent number: 5362878Abstract: Compounds of the formula ##STR1## wherein R.sup.21 and R.sup.22 are as defined in the specification which are intermediates useful in the preparation of compounds of the formula ##STR2## and the pharmaceutically acceptable salts thereof, wherein Q and R.sup.1 are as defined in the specification. The compounds of formula I are inhibitors of acyl coenzyme A: cholesterol acyltransferase (ACAT) and are useful as hypolipidemic and antiatherosclerosis agents.Type: GrantFiled: July 20, 1992Date of Patent: November 8, 1994Assignee: Pfizer Inc.Inventors: George Chang, Ernest S. Hamanaka, Peter A. McCarthy, Thien Truong, Frederick J. Walker
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Patent number: 5332857Abstract: Variously substituted 3,5-dihydroxy-6,8-nonadienoic acids and esters, are blood cholesterol lowering agents and so are useful in the prevention and treatment of cardiovascular diseases such as atherosclerosis.Type: GrantFiled: July 6, 1992Date of Patent: July 26, 1994Assignee: Pfizer Inc.Inventors: Peter A. McCarthy, Frederick J. Walker
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Patent number: 5225031Abstract: A process and structure involving a silicon substrate utilizes an ultra high vacuum and molecular beam epitaxy (MBE) methods to grow an epitaxial oxide film upon a surface of the substrate. As the film is grown, the lattice of the compound formed at the silicon interface becomes stabilized, and a base layer comprised of an oxide having a sodium chloride-type lattice structure grows epitaxially upon the compound so as to cover the substrate surface. A perovskite may then be grown epitaxially upon the base layer to render a product which incorporates silicon, with its electronic capabilities, with a perovskite having technologically-significant properties of its own.Type: GrantFiled: April 10, 1991Date of Patent: July 6, 1993Assignee: Martin Marietta Energy Systems, Inc.Inventors: Rodney A. McKee, Frederick J. Walker
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Patent number: 5151545Abstract: Variously substituted 3,5-dihydroxy-6,8-nonadienoic acids and esters, are blood cholesterol lowering agents and so are useful in the prevention and treatment of cardiovascular diseases such as atherosclerosis.Type: GrantFiled: March 27, 1990Date of Patent: September 29, 1992Assignee: Pfizer Inc.Inventors: Peter A. McCarthy, Frederick J. Walker
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Derivatives of 5-hydroxy and 5-methoxy 2-amino-pyrimidines as inhibitors of interleukin-1 production
Patent number: 5071852Abstract: This invention relates to the use of certain derivatives of 5-hydroxy and 5-methoxy 2-aminopyrimidines of the formula ##STR1## and the pharmaceutically-acceptable salts thereof, wherein R.sup.1 is H or CH.sub.3 ; R.sup.2 is (C.sub.3 -C.sub.15) straight chain alkyl or (C.sub.7 -C.sub.20)phenylalkyl which may be substituted in the phenyl by one or two fluoro or chloro substituents; and R.sup.3 is H or CH.sub.3 to inhibit interleukin-1 production in a mammal. This invention also relates to the use of such compounds for treating interleukin-1 mediated disorders and dysfunctions such as bone and connective tissue metabolism disorders and immune dysfunction in a mammal. The methods of this invention comprise administering an interleukin-1 production inhibiting amount of the compounds and salts of this invention to such a mammal.Type: GrantFiled: December 1, 1989Date of Patent: December 10, 1991Assignee: Pfizer Inc.Inventor: Frederick J. Walker -
Patent number: 5001136Abstract: 2-substitutedmethylamino-amino 5-(hydroxy or alkoxy) pyridines and derivatives thereof are disclosed. The compounds are inhibitors of leukotriene synthesis and are therefore useful for the treatment of pulmonary, inflammatory, dermatological, allergic and cardiovascular diseases.Type: GrantFiled: June 7, 1990Date of Patent: March 19, 1991Assignee: Pfizer Inc.Inventor: Frederick J. Walker
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Patent number: 4940712Abstract: 2-Amino and 2-thio-4-substituted-5-(hydroxy or alkoxy)-pyrimidines, which may be 6-substituted, and derivatives thereof are disclosed. The compounds are inhibitors of leukotriene synthesis and are, therefore, useful for the treatment of pulmonary, inflammatory, dermatological, allergic and cardiovascular diseases. The compounds are also cytoprotective and therefore, useful in the treatment of peptic ulcers.Type: GrantFiled: May 26, 1989Date of Patent: July 10, 1990Assignee: Pfizer Inc.Inventors: Frederick J. Walker, Lawrence S. Melvin
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Patent number: 4910204Abstract: A compound of the formula ##STR1## or a pharmaceutically acceptable salt thereof, wherein R.sup.1 is hydrogen; R.sup.2 is (C.sub.1 -C.sub.15) alkyl, (C.sub.3 -C.sub.15)alkenyl, phenyl, substituted phenyl, (C.sub.7 -C.sub.20)-phenylalkyl, or substituted (C.sub.7 -C.sub.20)phenylalkyl wherein the substituents on the substituted phenyl and substituted phenylalkyl are independently one or two of fluoro, chloro, (C.sub.1 -C.sub.3)alkyl, (C.sub.1 -C.sub.3 alkoxy, and trifluoromethyl; or R.sup.1 and R.sup.2 together with the nitrogen atom to which they are attached form a pyrrolodinyl, substituted pyrrolidinyl, piperidyl or substituted piperidyl group, wherein the substituents on said substituted pyrrolidinyl and piperidyl groups are independently one of (C.sub.1 -C.sub.6)alkyl, phenyl, and (C.sub.7 -C.sub.9)phenylalkyl; and R.sup.3 is hydrogen, (C.sub.1 -C.sub.6)alkyl, phenyl, substituted phenyl, (C.sub.7 -C.sub.9)phenylalkyl, or substituted (C.sub.7 -C.sub.Type: GrantFiled: June 28, 1988Date of Patent: March 20, 1990Assignee: Pfizer Inc.Inventors: Frederick J. Walker, John L. LaMattina, Brian T. O'Neill
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Patent number: 4798951Abstract: A fiber optic displacement transducer is provided by a fiber optic reflective probe (2), and an axially moveable target (4) having a dichroic optical filter (16) with first and second reflection surfaces (20 and 24) axially spaced by a fixed distance t and reflecting different wavelength light.Type: GrantFiled: December 14, 1987Date of Patent: January 17, 1989Assignee: Consolidated Controls CorporationInventor: Frederick J. Walker