Fluoridation Chemicals

Fluoridation Chemicals

http://www.penweb.org/fluoride/chemicals/

http://www.npwa.freeserve.co.uk/pollution.htm

1949

Raymond J. ANDERSON, Midland, Michigan, assignor to the Dow Chemical Company, Midland, MI: "Treatment of water with calcium chloride fluoride"; US Patent 2,671,755; filed August 5, 1949; granted March 9, 1954 ("Sodium fluoride is at present the only fluoride used for this purpose. However, it is expensive, and the supply is limited. If several of the larger cities were to adopt the sodium fluoride treatment, a serious supply problem would develop.")

Raymond J. ANDERSON, Midland, Michigan, assignor to the Dow Chemical Company, Midland, MI: "Method of producing a fluoride-containing composition", US Patent 2,690,430; filed Nov. 16, 1949; granted Sept. 28, 1954 ("... treating calcium fluoride with a strongly alkaline metal hydroxide; ... the resulting material, which is largely a mixture of metal fluoride and calcium hydroxide, may be used directly for water treatment, some organic fluorinations, and other purposes ...)

1950

Max GROECK, Bottrop (Germany): "Verfahren zur Anreicherung von zu Genußzwecken bestimmtem Wasser mit fluorhaltigen Verbindungen"; "A method of enriching water with fluorine compounds"; German Patent (DE) 943,760; filed March 2, 1950, granted May 9, 1956; French Patent (FR) 1,165,877; filed June 14, 1956; granted Oct. 30, 1958; British Patent (GB) 819,741; filed June 15, 1956; granted Sept. 9, 1959

Wayne E. WHITE, Tulsa, Oklahoma, assignor to Ozark-Mahoning Company, Tulsa, Oklahoma: "Water Fluoridation and impurity coagulation"; US Patent 2,643,226; filed June 10, 1950; granted June 23, 1953 ("Flural" (AlFSO₄) Patent; aluminum fluoride complex made from alum/alumina and calcium fluoride, to be used for water fluoridation)

Wayne E. WHITE, Tulsa, Oklahoma, assignor to Ozark-Mahoning Company, Tulsa, Oklahoma: "Method of treatment of fluorinated aluminum-bearing mineral products", US Patent 2,643,179; filed July 21, 1950; granted June 23, 1953 ("Flural" (AlFSO₄) Patent; aluminum fluoride complex made from spent bauxite and hydrogen fluoride, to be used for water fluoridation)

1951

Henry F. MUNROE, Cranston, R.I., assignor to Proportioneers Inc., a corporation of Rhode Island: "Apparatus and method for providing a fluoride solution"; US Patent 2,749,222; filed Aug. 30, 1951; granted June 5, 1956

1952

Herman E. SCHULSE, Bal Harbor, Fla.: "Chemical Feeders", US Patent 2,767,846; filed Oct. 2, 1952; granted Oct. 23, 1956

1957

Franz J. MAIER, Chevy Chase, and Ervin BELLACK, Bethesda, Md., assignors to the United States of America as represented by the Secretary of the Army and the Secretary of Health, Education and Welfare: "Fluoridation of Drinking Water", US Patent 3,078,225; filed Oct. 29, 1957 (abandoned), this application Nov. 12, 1959, granted Feb. 19, 1963 (Fluorspar dissolver, in alum)

1958

Anthony E. ROBERTSON, Elkton, Md., assignor to Aerial Products, Inc., Elkton, Md.: "Process for fluoridating water"; US Patent 3,027,304; filed Jan. 8, 1958; granted March 27, 1962 (Fluorspar dissolver, in calcium phosphate)

1959

Robert W. WOLFE, Belton, Mo.: "Water fluoridation device", US Patent 3,025,876; filed Oct. 2, 1959; pat. March 20, 1962

1963

Robert M. BROWN, Richard LAVINE, William COLEMAN, Marvin E. LEVIN: "Fluoridation apparatus", US Patent 3,191,868; filed Oct. 16, 1963; pat. June 29, 1965

1965

Helmut LINGELBACH, Karl-Marx-Stadt, assignor to Deutsche Akademie für Ärztliche Fortbildung, (under the laws of Eastern Germany), Berlin: "Verfahren zur kombinierten Chlorung und Fluoridierung bei Trinkwässern"; "Process for chlorination and fluoridation of drinking water"; German Patent (DE) 1,517,410; filed July 26, 1965; granted May 22, 1969; British Patent (GB) 1,047,605; filed Oct. 13, 1965, granted Nov. 9, 1966

1966

Albert H. HALFF, Dallas, Tx., and Allen F. REID, Dallas Tx.: "Apparatus for fluoridation of water", US Patent 3,420,637; filed Sept. 26, 1966; granted Jan. 7, 1969

1979

John N. LEO: "Fluoridation system", US Patent 4,234,425; filed April 23, 1979; pat. Nov. 18, 1980

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