Patents by Inventor George W. Clark, III

George W. Clark, III 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).

  • Propanoates and processes for preparing the same
    Patent number: 8163464
    Abstract: A process for preparing proponates which comprises the steps of (i) supplying a solution of methanol containing 4-hydroxyphenylmethylcarbinol, (ii) subjecting said solution to an acid catalyzed displacement reaction for a sufficient period of time and under suitable conditions of temperature and pressure to convert substantially all of said carbinol to 4-hydroxyphenylmethylcarbinol methyl ether in solution, (iii) replacing the methanol in said ether containing solution with a second solvent and (iv) reacting the ether containing ethyl lactate solution with a suitable acid catalyst for a sufficient period of time and under suitable conditions of temperature and pressure to form said propanoates. New compositions of matter which comprise the propanoates, prepared in the above manner, have application in the electronic chemicals market such as in a photoresist composition.
    Type: Grant
    Filed: August 4, 2009
    Date of Patent: April 24, 2012
    Assignee: Du Pont Electronic Polymers L.P.
    Inventors: Michael T. Sheehan, James R. Sounik, George W. Clark, III
  • New propanoates and processes for preparing the same
    Publication number: 20100047714
    Abstract: A process for preparing proponates which comprises the steps of (i) supplying a solution of methanol containing 4-hydroxyphenylmethylcarbinol, (ii) subjecting said solution to an acid catalyzed displacement reaction for a sufficient period of time and under suitable conditions of temperature and pressure to convert substantially all of said carbinol to 4-hydroxyphenylmethylcarbinol methyl ether in solution, (iii) replacing the methanol in said ether containing solution with a second solvent and (iv) reacting the ether containing ethyl lactate solution with a suitable acid catalyst for a sufficient period of time and under suitable conditions of temperature and pressure to form said propanoates. New compositions of matter which comprise the propanoates, prepared in the above manner, have application in the electronic chemicals market such as in a photoresist composition.
    Type: Application
    Filed: August 4, 2009
    Publication date: February 25, 2010
    Inventors: Michael T. Sheehan, James R. Sounik, George W. Clark, III
  • Intermediate for prostaglandins and process for preparing the intermediate
    Patent number: 4229592
    Abstract: The compound of the formula ##STR1## has been found to be an important and practical intermediate with the proper stereo-isomerism for the preparation of numerous prostaglandin derivatives. It can easily be converted to 4.alpha.-acetoxy-2-cyclopentenone by a variety of processes.
    Type: Grant
    Filed: February 6, 1978
    Date of Patent: October 21, 1980
    Assignee: Kansas University Endowment Association
    Inventors: Lester A. Mitscher, George W. Clark, III, Paul B. Hudson
  • Intermediates for the preparation of prostaglandins and prostaglandin analogs from a mold metabolite
    Patent number: 4188329
    Abstract: This invention provides intermediates which are essential for a new chemical method which converts terrein, a fungal metabolite, to an intermediate which is known to be useful for the preparation of prostaglandins of the C series and analogs of other prostaglandins.
    Type: Grant
    Filed: May 11, 1978
    Date of Patent: February 12, 1980
    Assignee: Abbott Laboratories
    Inventors: Lester A. Mitscher, George W. Clark, III, Gordon H. Bokelman