Harold D Lesher
Real Estate Commission in Wilmington, DE
License number
Delaware RS-0015281
Issued Date
Jun 20, 2002
Expiration Date
Apr 30, 2018
Category
Real Estate
Type
Salesperson
Address
Address
2
Wilmington, DE 19808
Personal information
See more information about Harold D Lesher at radaris.comName
Address
Phone
6 Falcon Ct, Wilmington, DE 19808
6 Falcon Ct, Wilmington, DE 19808
6 Falcon Ct, Wilmington, DE 19808
Professional information
Methods Of Making Composite Ceramic Articles Having Embedded Filler
US Patent:
5654246, Aug 5, 1997
Filed:
May 26, 1995
Appl. No.:
8/451581
Inventors:
Marc Stevens Newkirk - Newark DE
Harry Richard Zwicker - Glen Mills PA
Andrew Willard Urquhart - Newark DE
John Peter Biel - New Castle DE
Jack Andrew Kuszyk - Lincoln University PA
Craig Barlow Shumaker - Newark DE
Harold Daniel Lesher - Wilmington DE
Terry Dennis Claar - Newark DE
Michael Kevork Aghajanian - Newark DE
Harry Richard Zwicker - Glen Mills PA
Andrew Willard Urquhart - Newark DE
John Peter Biel - New Castle DE
Jack Andrew Kuszyk - Lincoln University PA
Craig Barlow Shumaker - Newark DE
Harold Daniel Lesher - Wilmington DE
Terry Dennis Claar - Newark DE
Michael Kevork Aghajanian - Newark DE
Assignee:
Lanxide Technology Company, LP - Newark DE
International Classification:
C04B 3800
US Classification:
501 80
Abstract:
A method of making self-supporting ceramic composite structures having filler embedded therein includes infiltrating a permeable mass of filler with polycrystalline material comprising an oxidation reaction product obtained by oxidation of a parent metal such as aluminum. The self-supporting ceramic composite structure optionally contains therein non-oxidized constituents of the parent metal. The structure is formed by placing a parent metal adjacent to a permeable filler and heating the assembly to melt the parent metal and provide a molten body of parent metal which is contacted with a suitable oxidant. Within a certain temperature region and optionally, aided by one or more dopants in or on the parent metal, molten parent metal will migrate through previously formed oxidation reaction product into contact with the oxidant, causing the oxidation reaction product to grow so as to embed the adjacent filler and provide the composite structure. The parent metal may be provided as a body of metal placed in contact with an exterior surface of the permeable mass. Alternatively, the parent metal may be placed adjacent to the filler material by admixing a plurality of discrete bodies of parent metal (e. g.
Methods Of Making Composite Aluminum Nitride Ceramic Articles Having Embedded Filler
US Patent:
5420085, May 30, 1995
Filed:
Jan 21, 1993
Appl. No.:
8/007387
Inventors:
Marc S. Newkirk - Newark DE
Harry R. Zwicker - Glen Mills PA
Andrew W. Urquhart - Newark DE
Harold D. Lesher - Wilmington DE
Terry D. Claar - Newark DE
Michael K. Aghajanian - Bel Air MD
John P. Biel - Newark DE
Harry R. Zwicker - Glen Mills PA
Andrew W. Urquhart - Newark DE
Harold D. Lesher - Wilmington DE
Terry D. Claar - Newark DE
Michael K. Aghajanian - Bel Air MD
John P. Biel - Newark DE
Assignee:
Lanxide Technology Company, LP - Newark DE
International Classification:
C04B 3565, C04B 3558
US Classification:
501 98
Abstract:
A method of making self-supporting ceramic composite structures having filler embedded therein includes infiltrating a permeable mass of filler with polycrystalline material comprising an oxidation reaction product obtained by oxidation of a parent metal such as aluminum and optionally, containing therein non-oxidized constituents of the parent metal. The structure is formed by placing a parent metal adjacent to a permeable filler and heating the assembly to melt the parent metal and provide a molten body of parent metal which is contacted with a suitable vapor-phase oxidant. Within a certain temperature region and optionally, aided by one or more dopants in or on the parent metal, molten parent metal will migrate through previously formed oxidation reaction product into contact with the oxidant, causing the oxidation reaction product to grow so as to embed the adjacent filler and provide the composite structure. In a preferred embodiment, a parent metal comprising aluminum is oxidized by a vapor-phase oxidant comprising nitrogen to form a ceramic matrix comprising an aluminum nitride oxidation reaction product. In a particularly preferred embodiment, one or more protective coatings are applied to the filler prior to formation of the aluminum nitride oxidation reaction product matrix.
Methods Of Producing Ceramic And Ceramic Composite Bodies
US Patent:
5262203, Nov 16, 1993
Filed:
Jun 8, 1992
Appl. No.:
7/895294
Inventors:
Harold D. Lesher - Wilmington DE
Ratnesh K. Dwivedi - Wilmington DE
Perry B. Goldberg - North East MD
Ratnesh K. Dwivedi - Wilmington DE
Perry B. Goldberg - North East MD
Assignee:
Lanxide Technology Company, LP - Newark DE
International Classification:
C23C 200
US Classification:
4273835
Abstract:
There is disclosed methods for producing self-supporting ceramic matrix and ceramic matrix composite bodies by batch, semi-continuous, and continuous processes utilizing the directed oxidation of a molten parent metal with an oxidant to form an oxidation reaction product which may embed filler material.
Method Of Making Ceramic Composites
US Patent:
4921818, May 1, 1990
Filed:
Mar 16, 1988
Appl. No.:
7/169203
Inventors:
Harold D. Lesher - Wilmington DE
Christopher R. Kennedy - Newark DE
Danny R. White - Elkton MD
Andrew W. Urquhart - Newark DE
Christopher R. Kennedy - Newark DE
Danny R. White - Elkton MD
Andrew W. Urquhart - Newark DE
Assignee:
Lanxide Technology Company, LP - Newark DE
International Classification:
C04B 3510
US Classification:
501 89
Abstract:
The invention relates to a method for producing ceramic composites obtained by oxidation of a parent metal to form a polycrystalline ceramic material by providing a filler having a coating of a silicon source on at least a portion of the filler different in composition from the primary composition of the filler, said silicon source possessing intrinsic doping properties. A body of molten parent metal, adjacent a mass of the filler material, reacts with an oxidant to form an oxidation reaction product which infiltrates the adjacent mass of filler, thereby forming the ceramic composite.
Methods Of Producing Ceramic And Ceramic Composite Bodies
US Patent:
5120580, Jun 9, 1992
Filed:
May 14, 1990
Appl. No.:
7/523110
Inventors:
Harold D. Lesher - Wilmington DE
Ratnesh K. Dwivedi - Wilmington DE
Perry B. Goldberg - North East MD
Ratnesh K. Dwivedi - Wilmington DE
Perry B. Goldberg - North East MD
Assignee:
Lanxide Technology Company, LP - Newark DE
International Classification:
C23C 200
US Classification:
4273835
Abstract:
There is disclosed methods for producing self-supporting ceramic matrix and ceramic matrix composite bodies by batch, semi-continuous, and continuous processes utilzing the directed oxidation of a molten parent metal with an oxidant to form an oxidation reaction product which may embed filler material.
Method Of Making Ceramic Composites
US Patent:
5246895, Sep 21, 1993
Filed:
Apr 20, 1992
Appl. No.:
7/871467
Inventors:
Harold D. Lesher - Wilmington DE
Christopher R. Kennedy - Newark DE
Danny R. White - Elkton MD
Andrew W. Urquhart - Newark DE
Christopher R. Kennedy - Newark DE
Danny R. White - Elkton MD
Andrew W. Urquhart - Newark DE
Assignee:
Lanxide Technology Company, LP - Newark DE
International Classification:
C04B 3510
US Classification:
501 89
Abstract:
The invention relates to a method for producing ceramic composites obtained by oxidation of a parent metal to form a polycrystalline ceramic material by providing a filler having a coating of a silicon source on at least a portion of the filler different in composition from the primary composition of the filler, said silicon source possessing intrinsic doping properties. A body of molten parent metal, adjacent a mass of the filter material, reacts with an oxidant to form an oxidation reaction product which infiltrates the adjacent mass of filler, thereby forming the ceramic composite.