Patents by Inventor Jack E. Richman

Jack E. Richman 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).

  • Patent number: 7741513
    Abstract: The invention provides novel chiral compounds including 2-methoxy-2-trifluoromethylphenylacetic thioacid useful to react with and analyze other chiral compounds that have an electrophilic chiral carbon center.
    Type: Grant
    Filed: January 16, 2008
    Date of Patent: June 22, 2010
    Inventor: Jack E. Richman
  • Publication number: 20090181462
    Abstract: The invention provides novel chiral compounds including 2-methoxy-2-trifluoromethylphenylacetic thioacid useful to react with and analyze other chiral compounds that have an electrophilic chiral carbon center.
    Type: Application
    Filed: January 16, 2008
    Publication date: July 16, 2009
    Inventor: Jack E. Richman
  • Patent number: 5108556
    Abstract: A process for preparing tertiary perfluoroamines is provided. The process comprises electrochemically fluorinating a tertiary thioamide precursor, said thioamide precursor having at least one thioamide moiety, ##STR1## and terminal portions which can be alkyl or cycloalkyl having 1 to 12 carbon atoms, aryl having 6 to 12 carbon atoms, or combinations thereof, with the proviso that when more than one thioamide moiety is present, the thioamide moieties are bonded together by alkylene, cycloalkylene or arylene groups. Also provided are tertiary thioamides and tertiary perfluoroamines.
    Type: Grant
    Filed: September 14, 1990
    Date of Patent: April 28, 1992
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Jack E. Richman
  • Patent number: 4001212
    Abstract: Macrocyclic polyamines containing 3-7 nitrogen atoms in the ring and destablized to complex formation by (1) an asymmetric ring and/or (2) provision of nitrogen atoms in excess of that required for complex formation are described. The compounds can be used to extract metal ions from solution. The metal complexes are thermally activated curing agents for epoxy resins.
    Type: Grant
    Filed: October 3, 1973
    Date of Patent: January 4, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Jack E. Richman
  • Patent number: 3932451
    Abstract: 1,4,7,10-Tetraazatetracyclo[5.5.1.0.sup.4,13.0.sup.10,13 ]tridecane -tridecane which can reversibly and successively add two moles of acids to form conjugate acids, can be made by condensation of 1,4,7,10-tetraazacyclododecane with ethyl orthocarbonate or by the condensation of 2,3,5,6-tetrahydro-1H-imidazo[1,2-a]imidazole with ethyl bis(2-chloroethyl)carbamate followed by acid hydrolysis. The salts with acids having photographically innocuous anions can be used in developers for silver halide emulsion to reduce fog, and can be used in the emulsions themselves as sensitizers.
    Type: Grant
    Filed: November 27, 1973
    Date of Patent: January 13, 1976
    Assignee: E. I. Du Pont de Nemours & Company
    Inventors: John Howard Bigelow, Jack E. Richman