Patents by Inventor Helen L. Janoski

Helen L. Janoski 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).

  • S,S-dimethyl 2-chloro-1,2,3,4-tetrahydro-4(2-methylpropyl)-2,6-bis(trifluoromethyl)-3 ,5-pyridinedicarbothioate
    Patent number: 5162536
    Abstract: Described herein is a process for dehydration of substituted piperidine dicarbothioate compounds and a novel compound obtained thereby.
    Type: Grant
    Filed: October 28, 1991
    Date of Patent: November 10, 1992
    Assignee: Monsanto Company
    Inventors: Sherrol L. Baysdon, Helen L. Janoski
  • Process for preparation of fluoromethyl-substituted dihydropyridine carbodithioates
    Patent number: 5116991
    Abstract: A process for dehydration of a 4-(lower alkyl)-2,6-bis(trifluoromethyl)-2,6-bis(hydroxy)-piperidine-3,5-dicarboxyl ic acid thioesters and esters.
    Type: Grant
    Filed: March 19, 1990
    Date of Patent: May 26, 1992
    Assignee: Monsanto Company
    Inventors: Helen L. Janoski, Sherrol L. Baysdon, Mitchell L. Pulwer
  • Ammonium salt of methyl 4,4,4-trifluoro-3-oxo-butanethioate
    Patent number: 5105002
    Abstract: Ammonium salt of methyl 4,4,4-trifluoro-3-oxobutanethioate (TMTFAA).
    Type: Grant
    Filed: April 8, 1991
    Date of Patent: April 14, 1992
    Assignee: Monsanto Company
    Inventors: Sherrol L. Baysdon, Mitchell J. Pulwer, Helen L. Janoski
  • Process for preparation of aromatic thiol esters
    Patent number: 5071992
    Abstract: A process for producing an aromatic thiolester by mixing an alkyl or aryl thiol with an alkali metal hydroxide aqueous solution and, in the presence of a phase transfer catalyst, reacting it with an aromatic acid halide. Diacid halides may be used to produce bisthiol esters.
    Type: Grant
    Filed: December 7, 1990
    Date of Patent: December 10, 1991
    Assignee: Monsanto Company
    Inventors: Helen L. Janoski, Mitchell J. Pulwer
  • Process for preparation of fluoromethyl-substituted piperidine carbodithioates
    Patent number: 5051512
    Abstract: Described herein is a process for preparation of substituted piperidine dicarbothioate compounds.
    Type: Grant
    Filed: March 19, 1990
    Date of Patent: September 24, 1991
    Assignee: Monsanto Company
    Inventors: Sherrol L. Baysdon, Mitchell J. Pulwer, Helen L. Janoski