(C) Peter Meiers - http://www.www.flywebz.com

   


Teflon (PTFE)


 

see also:

History of Teflon: http://www.inventionandtechnology.com/2000/01/feature.shtml

---- a short version: http://www.dupont.com/teflon/newsroom/history.html

Decomposition: Lewis E.E., Naylor M.A, (a contribution from E. I. Du Pont de Nemours & Company, Inc.).: "Pyrolysis of Polytetrafluoroethylene", J. am. chem. Soc. 69 (1947) 1968; Ellis D.A., et al.: "Thermolysis of fluoropolymers as a potential source of halogenated organic acids in the environment", Nature 412 (July 19, 2001) 321 ...

and.......................: http://www.mindfully.org/Plastic/Teflon/teflon.htm


1939

Roy J. PLUNKETT, Wilmington, Del., assignor to Kinetic Chemicals Inc.: "Tetrafluoroethylene Polymers"; US Patent 2,230,654; filed July 1, 1939; granted Feb. 4, 1941; French Patent (FR) 917,431; filed Nov. 14, 1945; granted Jan. 7, 1947 (Kinetic Chemicals Inc. is a subsidiary of E. I. Du Pont de Nemours & Company, Wilmington, Delaware -> see Hatmaker & Davis 1938 [literature.htm])


1940

Anthony F. BENNING, Frederick B. DOWNING, Roy J. PLUNKETT, assignors to Kinetic Chemicals Inc., Wilmington, Del.: "Preparation of tetrafluoroethylene", US Patent 2,401,897; filed April 4, 1940; pat. June 11, 1946


1942

Robert M. JOYCE, assignor to E. I. Du Pont de Nemours & Company, Wilmington, Del.: "Process for polymerizing tetrafluoroethylene", US Patent 2,394,243; filed July 23, 1942; pat. Feb. 5, 1946

Merlin Martin BRUBAKER, assignor to E. I. Du Pont de Nemours & Company, Wilmington, Del.: "Process for polymerizing tetrafluoroethylene", US Patent 2,393,967; filed Dec. 24, 1942; pat. Feb. 5, 1946


1943

George L. DOROUGH, assignor to E. I. Du Pont de Nemours & Company, Wilmington, Delaware: "Catalytic polymerization of mono-olefinic organic compounds", US Patent 2,398,926; filed March 10, 1943; pat. Apr. 23, 1946; filed as "Improved process for the manufacture of polymeric materials" in GB 585,396 on March 10, 1944, pat. Feb. 6, 1947


1944

Johannes ALFTHAN, John L. CHYNOWETH, assignors to E. I. Du Pont de Nemours & Company, Wilmington, Del.: "Fabrication of Polytetrafluoroethylene articles"; US Patent 2,396,629; filed March 29, 1944; granted March 19, 1946

Kenneth L. BERRY, Joseph R. DOWNING, assignors to E. I. Du Pont de Nemours & Company, Wilmington, Del.: "Extrusion apparatus", US Patent 2,403,476; filed Aug. 8, 1944; pat. July 9, 1946


1995

Michael J. McCREERY, Xenia, Ohio, assignor to the United States of America as represented by the Secretary of the Army: "Topical skin protectants", US Patent 5,607,979; filed May 30, 1995; granted March 4, 1997


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