WILLIAM DOUGLAS JOHNSON
Medical Practice in Newark, DE
License number
Pennsylvania MD004892E
Category
Medicine
Type
Medical Physician and Surgeon
Address
Address
2
Newark, DE 19711
Pennsylvania
Pennsylvania
Personal information
See more information about WILLIAM DOUGLAS JOHNSON at radaris.comName
Address
Phone
508 Sybil Dr, Erie, PA 16505
505 SE Front St #101, Milford, DE 19963
505 E Lancaster Ave APT 310, Wayne, PA 19087
505 Westview Ct, West Grove, PA 19390
5107 Lake Pleasant Rd, Erie, PA 16509
Professional information
Process For Preparing Self-Supporting Bodies Having Controlled Porosity And Graded Properties And Products Produced Thereby
US Patent:
5098870, Mar 24, 1992
Filed:
Jul 23, 1990
Appl. No.:
7/557332
Inventors:
Terry D. Claar - Newark DE
William B. Johnson - Newark DE
William B. Johnson - Newark DE
Assignee:
Lanxide Technology Company, LP - Newark DE
International Classification:
C04B 3510
US Classification:
501 87
Abstract:
This invention relates generally to a novel method of preparing self-supporting bodies and to the novel products made thereby. In its more specific aspects, this invention relates to a method of producing self-supporting bodies having controlled porosity and graded properties and comprising one or more boron-containing compounds, e. g. , a boride or a boride and a carbide. The method comprises, in one embodiment, reacting a powdered parent metal, in molten form, with a bed or mass comprising a boron carbide material and, optionally, one or more inert fillers, to form the body. In another embodiment, both of a powdered parent metal and a body or pool of molten parent metal are induced to react with a bed or mass comprising a boron carbide material and, optionally, one or more inert fillers. in addition, combustible additives (e. g. , gelatin, corn starch, wax, etc.
Method For Reducing Metal Content Of Self-Supporting Composite Bodies And Articles Formed Thereby
US Patent:
5232040, Aug 3, 1993
Filed:
Nov 15, 1991
Appl. No.:
7/794607
Inventors:
William B. Johnson - Newark DE
James C. Wang - Newark DE
James C. Wang - Newark DE
Assignee:
Lanxide Technology Company, LP - Newark DE
International Classification:
B22D 1902, B22D 1914
US Classification:
164 91
Abstract:
This invention relates generally to a novel method for removing metal from a formed self-supporting body. A self-supporting body is made by reactively infiltrating a molten parent metal into a bed or mass containing a boron source material and a carbon source material (e. g. , boron carbide) and/or a boron source material and a nitrogen source material (e. g. , boron nitride) and, optionally, one or more inert fillers. Once the self-supporting body is formed, it is then placed, at least partially, into contact with another material which causes metallic constituent contained in the self-supporting body to be at least partially removed.
Process For Preparing Self-Supporting Bodies And Products Produced Thereby
US Patent:
4885130, Dec 5, 1989
Filed:
Jan 13, 1989
Appl. No.:
7/296771
Inventors:
Terry D. Claar - Newark DE
Steven M. Mason - Norwood PA
Kevin P. Pochopien - Newark DE
Danny R. White - Elkton MD
William B. Johnson - Newark DE
Steven M. Mason - Norwood PA
Kevin P. Pochopien - Newark DE
Danny R. White - Elkton MD
William B. Johnson - Newark DE
Assignee:
Lanxide Technology Company, LP - Newark DE
International Classification:
B22T 100
US Classification:
419 12
Abstract:
Self-supporting bodies are produced by reactive infiltration of a parent metal into a boron carbide material which may contain one or both of a boron donor material and a carbon donor material. The reactive infiltration typically results in a composite comprising a boron-containing compound, a carbon-containing compound and residual metal, if desired. The mass to be infiltrated may contain one or more inert fillers admixed with the boron carbide material, boron-containing compound and/or carbon-containing compound. The relative amounts of reactants and process conditions may be altered or controlled to yield a body containing varying volume percents of ceramic, metal, ratios of one ceramic to another and porosity.
Method For Forming Bodies By Reactive Infiltration
US Patent:
5520880, May 28, 1996
Filed:
Sep 19, 1994
Appl. No.:
8/307649
Inventors:
William B. Johnson - Newark DE
Eugene S. Park - Hockessin DE
Gerhard H. Schiroky - Hockessin DE
Danny R. White - Elkton MD
Terry D. Claar - Newark DE
Eugene S. Park - Hockessin DE
Gerhard H. Schiroky - Hockessin DE
Danny R. White - Elkton MD
Terry D. Claar - Newark DE
Assignee:
Lanxide Technology Company, LP - Newark DE
International Classification:
B22F 700
US Classification:
419 45
Abstract:
This invention relates to a method for producing a self-supporting body comprising the steps of:
(a) forming a permeable mass comprising at least one solid-phase oxidant selected from the group consisting of the halogens, sulphur and its compounds, metals, metal oxides other than the silicates, and metal nitrides other than those of boron and silicon;
(b) orienting said permeable mass and a source of said parent metal relative to each other so that formation of said oxidation reaction product will occur into said permeable mass;
(c) heating said source of parent metal to a temperature above the melting point of said parent metal but below the melting point of said oxidation reaction product to form a body of molten parent metal;
(d) reacting said body of molten parent metal with said at least one solid-phase oxidant at said temperature to permit said oxidant at said temperature to permit said oxidation reaction product to form; and
(e) maintaining at least a portion of said at least one oxidation reaction product in contact with and between said molten parent metal and said solid-phase oxidant at said temperature to progressively draw molten parent metal through said oxidation reaction product towards said solid-phase oxidant to permit fresh oxidation reaction product to continue to form at an interface between said solid-phase oxidant and previously formed oxidation reaction product that has infiltrated said permeable mass.
Impact Energy Absorbing Composite Materials
US Patent:
5947918, Sep 7, 1999
Filed:
May 4, 1998
Appl. No.:
9/071943
Inventors:
Carl H. Jones - Katy TX
William B. Johnson - Newark DE
John M. Blaha - Chesapeake City MD
William B. Johnson - Newark DE
John M. Blaha - Chesapeake City MD
Assignee:
Gore Enterprise Holdings, Inc. - Newark DE
International Classification:
A61F 1300
US Classification:
602 58
Abstract:
An impact energy absorbing composite material of expanded polytetrafluoroethylene (ePTFE) and an elastomer is disclosed. The composite is comprised of at least one layer of expanded polytetrafluoroethylene and at least one layer of an elastomer. The individual layer thicknesses of the ePTFE and elastomer are controlled to achieve superior high energy impact resistance. The invention herein provides a material having performance that also can be tailored to meet other design needs for a given application, for example, space considerations or comfort.
Silicon Carbide Bodies And Methods Of Making The Same
US Patent:
5436208, Jul 25, 1995
Filed:
Apr 25, 1994
Appl. No.:
8/233144
Inventors:
William B. Johnson - Newark DE
Assignee:
Lanxide Technology Company, LP - Newark DE
International Classification:
C04B 35565
US Classification:
501 88
Abstract:
This invention broadly relates to methods for producing self-supporting silicon carbide and silicon carbide composite bodies. More particularly, this invention relates to silicon carbide and silicon carbide composites, grown by the oxidation reaction of a silicon metal with a gas comprising at least one gas selected from the group consisting of fluorinated hydrocarbon gases, chlorohydrocarbon gases, and chlorofluorocarbon gases.
Removing Metal From Composite Bodies And Resulting Products
US Patent:
5350003, Sep 27, 1994
Filed:
Jul 9, 1993
Appl. No.:
8/090352
Inventors:
Birol Sonuparlak - Newark DE
William B. Johnson - Newark DE
Ali S. Fareed - Wilmington DE
William B. Johnson - Newark DE
Ali S. Fareed - Wilmington DE
Assignee:
Lanxide Technology Company, LP - Newark DE
International Classification:
B22D 1902, B22D 1914
US Classification:
164 91
Abstract:
The present invention relates to a novel process for removal of at least a portion of at least one metallic component of a metallic constituent from a multi-phase composite body. Particularly, by providing at least one of an infiltration enhancer or an infiltration enhancer precursor or an infiltrating atmosphere to be in communication with a permeable mass, which contacts at least a portion of a composite body, said metallic component of the composite body, when made molten, is caused to spontaneously infiltrate the permeable mass. Such spontaneous infiltration occurs without the requirement for the application of any pressure or vacuum. The metallic constituent is essentially leached or removed from the multi-phase body by spontaneous infiltration.
Expandable Functional Tfe Copolymer Fine Powder, Expanded Products And Reacted Products Therefrom
US Patent:
2013020, Aug 8, 2013
Filed:
Mar 14, 2013
Appl. No.:
13/826590
Inventors:
W. L. Gore & Associates, Inc. - Newark DE, US
Jack J. Hegenbarth - Wilmington DE, US
Rachel Radspinner - Newark DE, US
Paul D. Drumheller - Flagstaff AZ, US
William B. Johnson - Newark DE, US
Wen Liu - Newark DE, US
Xin Kang Chen - Shanghai, CN
Jack J. Hegenbarth - Wilmington DE, US
Rachel Radspinner - Newark DE, US
Paul D. Drumheller - Flagstaff AZ, US
William B. Johnson - Newark DE, US
Wen Liu - Newark DE, US
Xin Kang Chen - Shanghai, CN
Assignee:
W. L. Gore & Associates, Inc. - Newark DE
International Classification:
C08F 214/26
US Classification:
521 505, 521145
Abstract:
A functional TFE copolymer fine powder is described, wherein the TFE copolymer is a polymer of TFE and at least one functional comonomer, and wherein the TFE copolymer has functional groups that are pendant to the polymer chain. The functional TFE copolymer fine powder resin is paste extrudable and expandable. Methods for making the functional TFE copolymer are also described. The expanded functional TFE copolymer material may be post-reacted after expansion.
Method Of Producing Ceramic Composite Bodies
US Patent:
5299621, Apr 5, 1994
Filed:
Sep 19, 1991
Appl. No.:
7/762163
Inventors:
Terry D. Claar - Newark DE
Gerhard H. Schiroky - Hockessin DE
Donald P. Ripa - North East MD
William B. Johnson - Newark DE
Gerhard H. Schiroky - Hockessin DE
Donald P. Ripa - North East MD
William B. Johnson - Newark DE
Assignee:
Lanxide Technology Company, LP - Newark DE
International Classification:
B22D 1900
US Classification:
164 98
Abstract:
This invention relates generally to a novel method of preparing self-supporting bodies, and novel products made thereby. In its more specific aspects, this invention relates to a method for producing self-supporting bodies comprising one or more boron-containing compounds, e. g. , a boride or a boride and a carbide, by reactive infiltration of molten parent metal into a preform comprising boron carbide or a boron donor material combined with a carbon donor material and, optionally, one or more inert fillers, to form the body. Specifically, a boron carbide material or combination of a boron donor material and a carbon donor material, and in either case, optionally, one or more inert fillers, are sedimentation cast, slip cast or pressed onto or into a body and into a particular desired shape.
Shaped Self-Supporting Ceramic Composite Bodies Comprising Silicon Nitrides
US Patent:
5356720, Oct 18, 1994
Filed:
May 28, 1993
Appl. No.:
8/068567
Inventors:
David K. Creber - Kingston, CA
William B. Johnson - Newark DE
Marc S. Newkirk - Newark DE
William B. Johnson - Newark DE
Marc S. Newkirk - Newark DE
Assignee:
Lanxide Technology Company, LP - Newark DE
International Classification:
C04B 3565
US Classification:
428545
Abstract:
The present invention relates to self-supporting ceramics or ceramic composite bodies which include a polycrystalline ceramic material comprising the oxidation reaction product of a silicon parent metal with a nitrogenous oxidant, including a nitrogenous vapor-phase oxidant, and optionally, one or more metallic constituents dispersed throughout the polycrystalline ceramic material. A barrier means comprising, for example, at least one of titanium nitride, zirconium nitride, aluminum nitride and boron nitride or a barrier means that has undergone chemical changes or alterations may be removably attached to the self-supporting ceramics or ceramic composite bodies of the present invention.