Patents by Inventor John H. Gaul, Jr.
John H. Gaul, Jr. 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: 4767831Abstract: A method of preparing ceramic materials or articles by the pyrolysis of preceramic silazane polymers, wherein the preceramic silazane polymers are rendered infusible prior to pyrolysis by treatment with steam or a steam and oxygen mixture, is disclosed. This method is especially suited for the preparation of ceramic fibers.Type: GrantFiled: October 7, 1986Date of Patent: August 30, 1988Assignee: Dow Corning CorporationInventors: Donald M. Bartos, John H. Gaul, Jr.
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Patent number: 4631260Abstract: A method of preparing ceramic materials or articles by the pyrolysis of preceramic silazane polymers, wherein the preceramic silazane polymers are rendered infusible prior to pyrolysis by treatment with steam or a steam and oxygen mixture, is disclosed. This method is especially suited for the preparation of ceramic fibers.Type: GrantFiled: May 23, 1986Date of Patent: December 23, 1986Assignee: Dow Corning CorporationInventors: Donald M. Bartos, John H. Gaul, Jr.
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Patent number: 4404153Abstract: What is disclosed is a process for preparing R'.sub.3 SiNH-containing silazane polymers by contacting and reacting chlorine-containing disilanes with {R'.sub.3 Si}.sub.2 NH where R' is vinyl, hydrogen, an alkyl radical of 1-3 carbon atoms or the phenyl group. The silazane polymers are useful as chemical intermediates to produce silicon-containing chemical compounds. They are also useful in the formation of silicon carbide-containing ceramic materials.Type: GrantFiled: August 10, 1981Date of Patent: September 13, 1983Assignee: Dow Corning CorporationInventor: John H. Gaul, Jr.
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Patent number: 4340619Abstract: What is disclosed is a process for preparing R'.sub.3 SiNH-containing silazane polymers by contacting and reacting chlorine-containing disilanes with {R'.sub.3 Si}.sub.2 NH where R' is vinyl, hydrogen, an alkyl radical of 1-3 carbon atoms or the phenyl group. The silazane polymers are useful as chemical intermediates to produce silicon-containing chemical compounds. They are also useful in the formation of silicon carbide-containing ceramic materials.Type: GrantFiled: January 15, 1981Date of Patent: July 20, 1982Assignee: Dow Corning CorporationInventor: John H. Gaul, Jr.
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Patent number: 4330642Abstract: Polymer bound multidentate complexes are prepared by reacting pendant benzyl chloride and benzyl iodide groups on a variety of polymer supports, including crosslinked polystyrene, with 3,3'-iminodiproprionitrile and reducing the nitrile groups by treatment with, for example, a boron hydride-tetrahydrofuran complex to form the amine. The amine is a precursor for other ligand systems; for example, the primary amine groups formed condense with an aldehyde or ketone to yield five coordinate Schiff base ligands. The polydentate amine ligand systems are useful for synthesis of chelating agents for sequestering metal ions from solution for purification or concentration purposes. Metal complexes of these ligands with manganese, iron, cobalt, nickel, copper, and zinc can be prepared which are useful as heterogeneous oxidation catalysts.Type: GrantFiled: March 20, 1981Date of Patent: May 18, 1982Assignee: University of Illinois FoundationInventors: John H. Gaul, Jr., Russell S. Drago
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Patent number: 4314956Abstract: Pre-polymers which are aminated methylpolysilanes are useful for the preparation of fine grained silicon carbide ceramic materials and silicon carbide-containing ceramics. The pre-polymers exhibit ease of handling and their use to obtain silicon carbide ceramic materials results in high yields.Type: GrantFiled: July 23, 1980Date of Patent: February 9, 1982Assignee: Dow Corning CorporationInventors: Ronald H. Baney, John H. Gaul, Jr.
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Patent number: 4312970Abstract: What is disclosed is a process for preparing R'.sub.3 SiNH-- containing silazane polymers by contacting and reacting organochlorosilanes with {R'.sub.3 Si}.sub.2 NH where R' is vinyl, hydrogen, an alkyl radical of 1-3 carbon atoms or the phenyl group. The silazane polymers are useful as chemical intermediates to produce silicon-containing chemical compounds. They are also useful in the formation of silicon carbide-containing ceramic materials.Type: GrantFiled: February 20, 1981Date of Patent: January 26, 1982Assignee: Dow Corning CorporationInventor: John H. Gaul, Jr.
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Patent number: 4310651Abstract: What is disclosed is an improved method of preparing silicon carbide which is characterized by the preparation of a specific pre-silicon carbide polymer. The method allows the preparation of silicon carbide from specific polysilane polymers without the cumbersome extractions and purifications found in the newer methods of silicon carbide preparation.Type: GrantFiled: March 31, 1980Date of Patent: January 12, 1982Assignee: Dow Corning CorporationInventors: Ronald H. Baney, John H. Gaul, Jr.
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Patent number: 4298559Abstract: Pre-polymers which are alkylated or arylated methylpolysilanes are useful for the preparation of silicon carbide ceramic materials. The pre-polymers exhibit ease of handling and their use to obtain silicon carbide ceramic materials results in high yields.Type: GrantFiled: July 23, 1980Date of Patent: November 3, 1981Assignee: Dow Corning CorporationInventors: Ronald H. Baney, John H. Gaul, Jr.
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Patent number: 4298558Abstract: Pre-polymers which are alkoxylated or phenoxylated methylpolysilanes are useful for the preparation of fine grained silicon carbide ceramic materials and silicon carbide-containing ceramics. The pre-polymers exhibit ease of handling and their use to obtain silicon carbide ceramic materials results in high yields.Type: GrantFiled: July 23, 1980Date of Patent: November 3, 1981Assignee: Dow Corning CorporationInventors: Ronald H. Baney, John H. Gaul, Jr.
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Patent number: 4281086Abstract: Polymer bound multidentate complexes are prepared by reacting pendant benzyl chloride and benzyl iodide groups on a variety of polymer supports, including crosslinked polystyrene, with 3,3'-iminodiproprionitrile and reducing the nitrile groups by treatment with, for example, a boron hydride-tetrahydrofuran complex to form the amine. The amine is a precursor for other ligand systems; for example, the primary amine groups formed condense with an aldehyde or ketone to yield five coordinate Schiff base ligands. The polydentate amine ligand systems are useful for synthesis of chelating agents for sequestering metal ions from solution for purification or concentration purposes. Metal complexes of these ligands with manganese, iron, cobalt, nickel, copper, and zinc can be prepared which are useful as heterogeneous oxidation catalysts.Type: GrantFiled: May 12, 1980Date of Patent: July 28, 1981Assignee: The University of Illinois FoundationInventors: John H. Gaul, Jr., Russell S. Drago
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Patent number: 4230828Abstract: Polymer bound multidentate complexes are prepared by reacting pendant benzyl chloride and benzyl iodide groups on a variety of polymer supports, including crosslinked polystyrene, with 3,3'-iminodiproprionitrile and reducing the nitrile groups by treatment with, for example, a boron hydride-tetrahydrofuran complex to form the amine. The amine is a precursor for other ligand systems; for example, the primary amine groups formed condense with an aldehyde or ketone to yield five coordinate Schiff base ligands. The polydentate amine ligand systems are useful for synthesis of chelating agents for sequestering metal ions from solution for purification or concentration purposes. Metal complexes of these ligands with manganese, iron, cobalt, nickel, copper, and zinc can be prepared which are useful as heterogeneous oxidation catalysts.Type: GrantFiled: December 11, 1978Date of Patent: October 28, 1980Assignee: The University of Illinois FoundationInventors: John H. Gaul, Jr., Russell S. Drago
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Patent number: RE31447Abstract: Pre-polymers which are alkoxylated or phenoxylated methylpolysilanes are useful for the preparation of fine grained silicon carbide ceramic materials and silicon carbide-containing ceramics. The pre-polymers exhibit ease of handling and their use to obtain silicon carbide ceramic materials results in high yields.Type: GrantFiled: April 16, 1982Date of Patent: November 22, 1983Assignee: Dow Corning CorporationInventors: Ronald H. Baney, John H. Gaul, Jr.