Patents by Inventor Sherrol L. Baysdon

Sherrol L. Baysdon 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).

  • Method for producing N-phosphonomethylglycine and its salts
    Patent number: 5948937
    Abstract: This invention relates to a process for the preparation of N-phosphonomethylglycine and its salts. More particularly, this invention is directed to a method for preparing N-phosphonomethylglycine involving the reaction of AMPA, an alkali metal cyanide or hydrogen cyanide, and formaldehyde and hydrolyzing the product of that reaction to form N-phosphonomethylglycine and its salts.
    Type: Grant
    Filed: September 5, 1997
    Date of Patent: September 7, 1999
    Assignee: Monsanto Company
    Inventors: Jimmy W. Worley, Melvin L. Rueppel, James C. Peterson, Sherrol L. Baysdon
  • Process for the preparation of glyphosate and glyphosate derivatives
    Patent number: 5874612
    Abstract: A process for preparing glyphosate and other secondary amines of related structure in which a precursor primary amine such as aminomethylphosphonic acid is condensed with glyoxylic acid, or a related aldehyde compound, and the condensation product reduced without isolation to produce the desired product.
    Type: Grant
    Filed: February 5, 1990
    Date of Patent: February 23, 1999
    Inventors: Sherrol L. Baysdon, Raymond C. Grabiak, Thomas E. Rogers, Lowell R. Smith
  • 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 fluoromethyl-substituted pyridine carbodithioates
    Patent number: 5099024
    Abstract: A process for dehydrofluorination of a 2,6-(bis)trifluoromethyl-dihydropyridine-3,5-dicarbothioic acid ester.
    Type: Grant
    Filed: March 19, 1990
    Date of Patent: March 24, 1992
    Assignee: Monsanto Company
    Inventors: Mitchell J. Pulwer, William Miller, Sherrol L. Baysdon
  • Process for preparation of fluoromethyl-substituted piperidine carbodithioates
    Patent number: 5055583
    Abstract: Described herein is a process for dehydrohalogenation of substituted dihydropyridine dicarbothioate compounds.
    Type: Grant
    Filed: March 19, 1990
    Date of Patent: October 8, 1991
    Assignee: Monsanto Company
    Inventors: Sherrol L. Baysdon, 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
  • Preparation of N-acyl-aminomethylphosphonates
    Patent number: 5041627
    Abstract: N-Acyl-aminomethylphosphonic acids represented by the formula ##STR1## wherein R is selected from the group consisting of methyl and aryl are prepared by:(a) bringing together under substantially anhydrous reaction conditions an amide represented by the formula ##STR2## wherein R is as defined above and paraformaldehyde; and thereafter, (b) adding phosphorous trihalide to the reaction mixture.
    Type: Grant
    Filed: January 19, 1990
    Date of Patent: August 20, 1991
    Assignee: Monsanto Company
    Inventors: Sherrol L. Baysdon, Donald L. Fields, Jr.
  • Process for the preparation of N- phosphonomethylglycine
    Patent number: 4851159
    Abstract: A process is disclosed for the preparation of N-phosphonomethylglycine which comprises bringing together under reaction conditions glyoxylic acid or a derivative thereof and an N-acylaminomethylphosphonic acid represented by the formula ##STR1## wherein R is selected from the group consisting of alkyl having from one to about 6 carbon atoms, haloalkyl having from one to about six carbon atoms, benzyl and phenyl.
    Type: Grant
    Filed: May 2, 1988
    Date of Patent: July 25, 1989
    Assignee: Monsanto Company
    Inventors: Jr. Fields, Raymond C. Grabiak, Sherrol L. Baysdon, Peter E. Rogers