Patents by Inventor Eric W. Otterbacher

Eric W. Otterbacher 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).

  • Process for the manufacture of R-(+)-2-(4-(4-cyano-2-fluorophenoxy)phenoxy)propionic acid esters
    Patent number: 9598356
    Abstract: Cyhalofop is prepared by coupling 2-(4-hydroxyphenoxy)propionic acid and 3,4-difluorobenzonitrile with base in a polar aprotic solvent in the presence of a phase-transfer catalyst.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: March 21, 2017
    Assignee: Dow AgroSciences LLC
    Inventors: Ronald B. Leng, Eric W. Otterbacher, Herbert N. Praay
  • Process for the manufacture of R-(+)-2-(4-(4-cyano-2-fluorophenoxy)phenoxy)propionic acid esters
    Patent number: 8071804
    Abstract: Cyhalofop esters are prepared by coupling 2-(4-hydroxyphenoxy)-propionic acid with 3,4-difluorobenzonitrile with base in a polar aprotic solvent (optionally including a phase-transfer catalyst), alkylating with alkyl halide, removing the polar aprotic solvent (optionally using cyhalofop ester as a flux), removing salt by aqueous extraction of molten cyhalofop ester without a solvent, and removing residual water by heating under reduced pressure.
    Type: Grant
    Filed: October 14, 2008
    Date of Patent: December 6, 2011
    Assignee: Dow AgroSciences LLC
    Inventors: Ronald B. Leng, Eric W. Otterbacher, Herbert N. Praay
  • PROCESS FOR THE MANUFACTURE OF R-(+)-2-(4-(4-CYANO-2-FLUOROPHENOXY)PHENOXY)PROPIONIC ACID ESTERS
    Publication number: 20110152560
    Abstract: Cyhalofop is prepared by coupling 2-(4-hydroxyphenoxy) propionic acid and 3,4-difluorobenzonitrile with base in a polar aprotic solvent in the presence of a phase-transfer catalyst.
    Type: Application
    Filed: February 24, 2011
    Publication date: June 23, 2011
    Applicant: DOW AGROSCIENCES LLC
    Inventors: Ronald B. Leng, Eric W. Otterbacher, Herbert N. Praay
  • PROCESS FOR THE MANUFACTURE OF R-(+)-2-(4-(4-CYANO-2-FLUOROPHENOXY)PHENOXY)PROPIONIC ACID ESTERS
    Publication number: 20090112015
    Abstract: Cyhalofop esters are prepared by coupling 2-(4-hydroxyphenoxy)-propionic acid with 3,4-difluorobenzonitrile with base in a polar aprotic solvent (optionally including a phase-transfer catalyst), alkylating with alkyl halide, removing the polar aprotic solvent (optionally using cyhalofop ester as a flux), removing salt by aqueous extraction of molten cyhalofop ester without a solvent, and removing residual water by heating under reduced pressure.
    Type: Application
    Filed: October 14, 2008
    Publication date: April 30, 2009
    Applicant: Dow AgroSciences LLC
    Inventors: Ronald B. Leng, Eric W. Otterbacher, Herbert N. Praay
  • Amine containing initiator system for anionic polymerization
    Patent number: 4960842
    Abstract: Narrow molecular weight telechelic and/or block copolymers are prepared by anionic polymerization using an initiator composition comprising a multifunctional lithium initiator in combination with an organic diamine or triamine and optionally a metal alkoxide.
    Type: Grant
    Filed: May 9, 1989
    Date of Patent: October 2, 1990
    Assignee: The Dow Chemical Company
    Inventors: Grace Y. Lo, Eric W. Otterbacher, Massimo D. Bezoari, Brian W. Walther
  • Acylation process to form diketones
    Patent number: 4922026
    Abstract: Aromatic diketones are prepared by a process comprising contacting at least one acylatable aromatic compound and at least one aromatic diacyl halide in the presence of catalytic amounts of ferric chloride or ferric oxide at an elevated temperature and at superatmospheric conditions.
    Type: Grant
    Filed: December 27, 1988
    Date of Patent: May 1, 1990
    Assignee: The Dow Chemical Company
    Inventors: Robert B. Baker, Jr., R. Garth Pews, Eric W. Otterbacher, James A. Gall
  • Preparation of alpha-aminoalkylphenols
    Patent number: 4843160
    Abstract: Prepare novel .alpha.-aminoalkylphenols by contacting an .alpha.-alkenylphenol and an amine under reaction conditions.
    Type: Grant
    Filed: October 1, 1984
    Date of Patent: June 27, 1989
    Assignee: The Dow Chemical Company
    Inventor: Eric W. Otterbacher
  • Preparation of carbonate diisocyanates and related compounds
    Patent number: 4746754
    Abstract: A class of novel tertiary alkyl isocyanates. Of these, novel carbonate diisocyanates can be prepared by contacting a carbonyl dihalide and an aminotertiaryalkylhydroxyaromatic compound in the presence of a base and a reaction medium under reaction conditions.
    Type: Grant
    Filed: May 16, 1986
    Date of Patent: May 24, 1988
    Assignee: The Dow Chemical Company
    Inventors: Eric W. Otterbacher, Abel Mendoza, Cynthia L. Rand
  • Preparation of monaoalkylated dihydroxybenzenes and novel compounds prepared thereby
    Patent number: 4691042
    Abstract: Preparation of monoethers of dihydroxybenzenes from an alkenylphenol and an alkylating agent and thereafter oxidizing in the presence of an acid catalyst.
    Type: Grant
    Filed: October 9, 1985
    Date of Patent: September 1, 1987
    Assignee: The Dow Chemical Company
    Inventors: Abel Mendoza, Eric W. Otterbacher
  • Preparation of monoalkylated dihydroxybenzenes
    Patent number: 4568497
    Abstract: Preparation of monoethers of dihydroxybenzenes from an alkenylphenol and an alkylating agent and thereafter oxidizing in the presence of an acid catalyst.
    Type: Grant
    Filed: May 29, 1984
    Date of Patent: February 4, 1986
    Assignee: The Dow Chemical Company
    Inventors: Abel Mendoza, Eric W. Otterbacher
  • Preparation of hydroxyaromatic ethers
    Patent number: 4528394
    Abstract: Prepare hydroxyaromatic ethers by contacting an oxidizing agent with an acylaromatic ether in the presence of an acid catalyst.
    Type: Grant
    Filed: August 3, 1983
    Date of Patent: July 9, 1985
    Assignee: The Dow Chemical Company
    Inventor: Eric W. Otterbacher
  • 2-Ethoxyethyl 2-(4-hydroxyphenoxy)-propanoate
    Patent number: 4511731
    Abstract: Preparation of monoethers of dihydroxybenzenes from an isopropenylphenol and an alkylating agent and thereafter oxidizing in the presence of an acid catalyst.
    Type: Grant
    Filed: June 24, 1983
    Date of Patent: April 16, 1985
    Assignee: The Dow Chemical Company
    Inventors: Abel Mendoza, Eric W. Otterbacher