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Total of 63 patents found where: Class is '501';

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T / S	Patent	Date	Description	Patentee	Category	Assigned To
		1837
U	393	September 22, 1837	Improvement in the Composition of Matter for Fire-Bricks Flint composition material for the Elliott flint insulators	FENTON, Christopher W.	Flint
		1867
U	61,390	January 22, 1867	Improved Compound for Telegraph Insulators, and for Other Purposes Heating earthenware insulators to 400-500 degrees and dipping into asphaltic compound that has been mixed with sulfur, silicic acid, and silicate of alumina to provide a hard, weather-resistant coating	BOYNTON, John F.	Coating
U	64,196	April 30, 1867	Improvement in the Manufacture of Porcelain Mixing cryolite, chiolite, and fluellite with sand and other common compounds for making glass in order to make a substance that looks similar to porcelain, but is actually glass that can be cast and formed like glass.	CHEYNEY, Waldron J.	Haley Insulator
		1870
U	103,122	May 17, 1870	Improvement in Insulators for Telegraphic Wire Hook with metallic oxide cement to hold hook or pin	BAKER, Robert B.	Hook
		1896
U	566,045	August 18, 1896	Insulator for Electrical Purposes Protective shield of metal with non-conducting enameled coating	WHITAKER, Alfred J. P. TREHARNE, Frederick G.	Protective Shield
		1906
U	816,270	March 27, 1906	Refractory Material for Electric Insulation and Other Purposes Insulating material made of steatite and water glass known as artificial lava	STEWARD, Demetrius M.	Misc
U	816,271	March 27, 1906	Process of Producing New Refractory Material for the Manufacture of Insulators and Other Uses Insulating material made of steatite and water glass known as artificial lava	STEWARD, Demetrius M.	Misc
		1908
U	907,155	December 22, 1908	Manufacture of Spar Insulators Feldspar insulator material (see reissue 12,992 on 7-13-1909)	LOCKE, Fred M.	Feldspar
		1909
R	12,992	July 13, 1909	Manufacture of Spar Insulators Feldspar insulator material (reissue of 907,155)	LOCKE, Fred M.	Feldspar
		1912
U	1,049,005	December 31, 1912	Insulating Composition and Process of Making the Same Artificial reconstructed lava made from combining soapstone or talc (hydrated silicate of magnesia), with a binder which is the precipitate of a mixture of magnesium sulfate and sodium silicate. The combination is then molded to the desired shape and fired at 1000 to 1300 degrees centigrade or higher.	STEINMETZ, Charles P.	Composition	General Electric Co.
		1914
U	1,091,678	March 31, 1914	Insulating Composition Boro-silicate glass	LOCKE, Fred M.	Boron
U	1,091,679	March 31, 1914	Insulator Boro-silicate glass	LOCKE, Fred M.	Boron
U	1,120,951	December 15, 1914	Manufacture of Insulators for High Potential Electric Conductors Boron used in porcelain insulators	LOCKE, Fred M.	Boron
		1915
U	1,127,042	February 2, 1915	Manufacture of High Potential Porcelain and Glass Insulators Boro-silicate glass	LOCKE, Fred M.	Boron
U	1,127,044	February 2, 1915	Insulator Boro-silicate glass	LOCKE, Fred M.	Boron
U	1,128,747	February 16, 1915	Method of Manufacturing Porcelain Insulators Manufacturing process for porcelain insulator firing unglazed, then filling porous porcelain with oxidizable oil and rendering the oil stable with ozone to form a coating to replace expense of firing on a glaze	BOEHM, Wilhelm	Manufacturing
U	1,136,504	April 20, 1915	Glass and Art of Making the Same Glass made from cullet with lime and clay added	BROOKFIELD, Henry M.	Glass
U	1,143,885	June 22, 1915	Process for Making a Compound of Glass Glass made from cullet with large amount of lime added for toughness	BROOKFIELD, Henry M.	Glass
U	1,156,163	October 12, 1915	Manufacture of High Potential Electric Conductors Boro-silicate glass & porcelain	LOCKE, Fred M.	Boron
		1917
U	1,225,147	May 8, 1917	Insulator Boro-silicate glass	LOCKE, Fred M.	Boron
U	1,226,088	May 15, 1917	Insulator and Composition Material for Insulating and Other Purposes Boro-silicate glass	LOCKE, Fred M.	Boron
U	1,233,486	July 17, 1917	Electrical Insulator Boro-silicate glass	LOCKE, Fred M.	Boron
		1919
U	1,304,622	May 27, 1919	Heating Vessel Production of glass baking dishes from Pyrex glass	SULLIVAN, Eugene C. TAYLOR, William C.	Non-electrical	Corning Glass Works
U	1,304,623	May 27, 1919	Glass Boro-silicate glass (Corning Pyrex glass)	SULLIVAN, Eugene C. TAYLOR, William C.	Boron	Corning Glass Works
		1922
U	1,409,953	March 21, 1922	Ceramic Insulating Material Porcelain composition using Sillimanite for high electrical and mechanical strength and low coefficient of expansion, which is particularly suitable for spark plugs	JEFFERY, Joseph A.	Porcelain	Jeffery-Dewitt Co.
U	1,431,166	October 10, 1922	Glass Boro-silicate glass	LOCKE, Fred M.	Boron
		1923
U	1,449,793	March 27, 1923	Glass and Process of Making Same Boro-silicate glass made colorless by adding neodymium oxide	TAYLOR, William C.	Boron	Corning Glass Works
		1924
U	1,510,521	October 7, 1924	Glass Boro-silicate glass	LOCKE, Fred M.	Boron
U	1,512,299	October 21, 1924	Temporary Binder for Ceramic Bodies Use of wheat flour to act as an organic binder to aid in holding the shape of a ceramic material before it is fired	NAGLE, Josehp A.	Manufacturing	Jeffery-Dewitt Co.
		1925
U	1,528,908	March 10, 1925	Process of Forming Ceramic Products Process of adding reagents to accelerate hardening of the clay to reduce the time body is in mold	BLEININGER, Albert V.	Manufacturing	1/2 to Frank H. Riddle
U	1,529,259	March 10, 1925	Glass Alumino-silicate glass (Corning's Flameware)	LOCKE, Fred M. LOCKE, Fred J.	Alumino
U	1,561,002	November 10, 1925	Method of Producing Clay Bodies and Apparatus Used Vacuum process for removing air from the clay	LAPP, Grover W.	Vacuum	Lapp Insulator Co., Inc.
		1926
U	1,569,251	January 12, 1926	Method of Preparing Clay or Body Composition for Ceramic Articles Method of preparing plastic clay without the use of filter presses by mixing dry ingredients with water, filtering, and evaporation of water with heat and vacuum before sending to the pug mill	AUSTIN, Arthur O.	Manufacturing	The Ohio Brass Co.
U	1,572,730	February 9, 1926	Batch for Making Ceramic Material and to a Ceramic Material Made Therefrom Porcelain composition for insulator using manganese	LOCKE, Fred M. LOCKE, Fred J.	Porcelain
U	1,589,617	June 22, 1926	Process for Preparing Material for Ceramic Articles Vacuum pugging after mixing dry ingredients with exact percent water needed	AUSTIN, Arthur O.	Vacuum	The Ohio Brass Co.
		1927
U	1,623,301	April 5, 1927	Heat Resisting Glass Glass of nearly opaque nature, probably that used for Fry insulators	BRENNER, Ralph F.	Glass	H. C. Fry Glass Co.
U	1,626,042	April 26, 1927	Glass Boro-silicate glass	LOCKE, Fred M.	Boron
U	1,631,729	June 7, 1927	Ceramic Insulating Material Porcelain composition for spark plugs and insulators consisting of Sillimanite and a glassy matrix	JEFFERY, Joseph A. MONTGOMERY, Earle T.	Porcelain	Champion Porcelain Co.
U	1,631,730	June 7, 1927	Ceramic Material Porcelain composition for spark plugs and insulators consisting of Sillimanite	JEFFERY, Joseph A. MONTGOMERY, Earle T.	Porcelain	Champion Porcelain Co.
U	1,633,462	June 21, 1927	Ceramic Insulating Material Clay mixture to produce a black porcelain body.	SORTWELL, Harold H.	Porcelain	Star Porcelain Co.
		1929
U	1,700,066	January 22, 1929	Insulator for Radio Frequency Currents Radio strain insulator made from Pyrex glass for antennas	MARSHALL, Albert E.	Radio	Corning Glass Works
U	1,723,174	August 6, 1929	Use of Dumortierite Porcelain composition use the mineral dumortierite which allows firing at a lower temperature	JEFFERY, Joseph A. RIDDLE, Frank H.	Porcelain	Champion Porcelain Co.
		1932
U	1,886,280	November 1, 1932	Ultra Violet Ray Transmitting Glass and to a Batch and Method for Making the Same Boro-silicate glass, method to make glass to transmit UV light	LOCKE, Fred M. LOCKE, Fred J.	Boron	Corning Glass Works
		1933
U	1,923,221	August 22, 1933	Process of Melting Glass Boro-silicate glass, method to make colorless by using graphite pot	LOCKE, Fred M. LOCKE, Fred J.	Boron	Corning Glass Works
U	1,925,058	August 29, 1933	Process for Forming Plastic Clay Masses Wet process clay reflocculation method to eliminate pugging process	ROWLAND, Davidge H. WETZEL, Kurt	Wet Process	Locke Insulator Corp.
		1939
U	2,155,835	April 25, 1939	Ceramic Insulating Material Improved ceramic composition using titanium oxide that will fire at typical kiln temperatures	MCCREERY, George L. CAMPBELL, Van E. HIGGINS, Ray	Ceramic Composition	The Ohio Brass Co.
U	2,157,100	May 9, 1939	Glazed Ceramic Insulator and the Like Glaze - compression glaze	ROWLAND, Davidge H.	Glaze	Locke Insulator Corp.
		1940
U	2,194,189	March 19, 1940	Pole Line Insulator CD 142, CD 142.4 - tin & iron for iridized coating to reduce water adherence	WHEELER, Herbert H. MCGINNIS, Orris THORDARSON, William	Insulator	Western Union Telegraph Co.
		1941
U	2,250,044	July 22, 1941	Insulator Multipart insulator with glazed sanded surfaces to improve strength of cap	CROSKEY, Carl D. ROWLAND, Davidge H.	Multipart	Locke Insulator Corp.
		1943
U	2,337,691	December 28, 1943	Method of Making High Strength Ceramic Surfaces Method of manufacturing insulators using porcelain ""sand"" with a lower coefficient of expansion than the insulator body to rough up the surface and provide a strong cement joint without reducing the effectiveness of the compression glaze (see 2,327,972)	STETTINIUS, Kenneth E. DEWEY, Benjamin F.	Manufacturing	Lapp Insulator Co., Inc.
		1944
U	2,346,620	April 11, 1944	Method of Forming Insulator Bodies Method to mix water with dry ingredients to form clay of the proper water content	SKIPPER, Edward M.	Clay	Locke Insulator Corp.
		1945
U	2,389,386	November 20, 1945	Glazed Ceramic Compression glaze	RUSSELL, JR., Ralston	Glaze	Westinghouse Electric Corp.
		1948
U	2,437,559	March 9, 1948	Insulator and Method of Manufacturing Same Addition of powdered aluminum to improve quality of porcelain	ROWLAND, Davidge H.	Manufacturing	The Porcelain Insulator Corp.
		1949
U	2,481,729	September 13, 1949	Porcelain Insulator Body Porcelain clay body with an increased firing range	DEWEY, Benjamin F.	Porcelain	Lapp Insulator Co., Inc.
		1950
U	2,513,958	July 4, 1950	Electric Insulating Bushing and Glass Therefore Glass capacitor bushing and improved seal with metal parts	OMLEY, Herbert A.	Bushing	General Electric Co.
		1951
U	2,562,292	July 31, 1951	Glass composition for electrical bulbs (TV tubes?) Glass Composition	BLACK, Harold R. GAGIN, Lawrence V.	OI	Owens-Illinois Glass Co.
		1963
U	3,096,684	July 9, 1963	Fenestration Structure for Control of Daylighting Glass block wall construction	KEGG, Robert R. LA BRECQUE, Raymond E. WARNKE, Richard C.	OI	Owens-Illinois Glass Co.
U	3,097,101	July 9, 1963	Ceramic Product and Method of Making the Same Increases the mechanical and electrical strength of porcelain insulators by controlling the grain size of the flint used in the porcelain body and the glaze.	LESTER, Ronald H.	Porcelain	General Electric Co.
		1964
U	3,127,278	March 31, 1964	Low-Melting Glass Sealant and Article Made Therefrom Welding of glass block and TV Tube parts	FRANCEL, Josef HAGEDORN, Erwin C.	OI	Owens-Illinois Glass Co.
		1968
U	3,368,026	February 6, 1968	Electrical Insulator Having Improved Surface Electrical Stress Distribution RFI prevention using two glaze coatings on suspension insulators	VINCE, Patrick Michael	RFI	Doulton & Co., Ltd.
		1972
U	3,658,583	April 25, 1972	Method for Producing Semi-Conducting Glaze Compositions for Electric Insulators RFI semi-conductive glaze formulas	OGAWA, Yutaka	RFI	NGK Insulators, Ltd.
		1982
U	4,332,913	June 1, 1982	Flux Combination of Barium Oxide and Potassium Feldspar for High Strength Alumina Porcelain Electric Insulators Porcelain composition with low shrinkage during firing	BOCK, Peter	Porcelain	Rosenthal Technik AG
		1988
U	4,782,199	November 1, 1988	Insulators Having Improved Steep Wave Front Characteristics Suspension, head treated with special glaze to strengthen cap/cement	SEIKE, Shoji TOTOKI, Takao MIMA, Toshiyuki	Suspension	NGK Insulators, Ltd.

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