Patents by Inventor Eric J. Pressman

Eric J. Pressman 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 regenerating a sulfonated aromatic organic polymeric ion-exchange resin bed having deactivated aminoorganomercaptan groups with phenol
    Patent number: 5428075
    Abstract: A method is provided for regenerating deactivated sulfonated aromatic organic ion-exchange resin beds, such as a polystyrene ion-exchange resin bed, having chemically combined amino organo mercaptan groups with anhydrous phenol at an elevated temperature.
    Type: Grant
    Filed: May 2, 1994
    Date of Patent: June 27, 1995
    Assignee: General Electric Company
    Inventors: Eric J. Pressman, Sheldon J. Shafer
  • Method for making bisphenol
    Patent number: 5414151
    Abstract: A method is provided for making bisphenol by condensing a ketone and a phenol in the presence of a sulfonated aromatic organic polymeric ion-exchange catalyst having aminoorganomercaptan groups using a phenol having less than 1 ppm of hydroxyacetone.
    Type: Grant
    Filed: May 2, 1994
    Date of Patent: May 9, 1995
    Assignee: General Electric Company
    Inventors: Eric J. Pressman, Sheldon J. Shafer
  • Method for making aromatic organic carbonates
    Patent number: 5399734
    Abstract: Improved yields of aromatic organic carbonates made by the palladium catalyzed direct carbonylation of aromatic organic hydroxy compounds can be achieved if the total gas pressure and partial pressure of carbon monoxide and oxygen are substantially maintained during the reaction.
    Type: Grant
    Filed: July 20, 1993
    Date of Patent: March 21, 1995
    Assignee: General Electric Company
    Inventors: Joseph A. King, Jr., Patricia D. Mackenzie, Eric J. Pressman
  • Method for making aromatic organic carbonates
    Patent number: 5312955
    Abstract: A method for making aromatic organic carbonate, such as diphenyl carbonate is provided which employs a transition metal catalyst in the form of a palladium catalyst mixture. The palladium catalyst can be used in combination with an organic cocatalyst, such as a terpyridine and a cobalt cocatalyst in the form of a cobalt complex containing a pentadentate ligand. The aromatic organic carbonate is separated from the carbonylation reaction mixture as a 1:1 molar adduct of aromatic organic carbonate such as diphenyl carbonate and aromatic organic hydroxy compound, such as phenol. The transition metal catalyst has been found to be recyclable allowing for the introduction of make up aromatic organic hydroxy compound into the reactor under ambient conditions.
    Type: Grant
    Filed: August 17, 1992
    Date of Patent: May 17, 1994
    Assignee: General Electric Company
    Inventors: Eric J. Pressman, Sheldon J. Shafer
  • Method for making aromatic carbonates
    Patent number: 5284964
    Abstract: A method is provided for making aromatic carbonates, such as diphenyl carbonate by the carbonylation of an aromatic hydroxy compound, such as phenol in the presence of a palladium catalyst and an organic cocatalyst, such as a terpyridine compound.
    Type: Grant
    Filed: August 17, 1992
    Date of Patent: February 8, 1994
    Assignee: General Electric Company
    Inventors: Eric J. Pressman, Joseph A. King, Jr.
  • Method for making aromatic carbonates
    Patent number: 5231210
    Abstract: A method is provided for making diphenyl carbonate by the direct carbonylation of phenol utilizing a palladium catalyst in combination with an inorganic cocatalyst in the form of a cobalt pentadentate complex.
    Type: Grant
    Filed: August 17, 1992
    Date of Patent: July 27, 1993
    Assignee: General Electric Company
    Inventors: Richard P. Joyce, Joseph A. King, Jr., Eric J. Pressman
  • Method and catalyst for making bisphenol
    Patent number: 4584416
    Abstract: A sulfonated aromatic organic polymer, such as sulfonated polystyrene ion-exchange resin is provided having ionically bound N-alkylaminoorganomercaptan groups. The ion-exchange resin can be used to effect phenol-ketone condensation.
    Type: Grant
    Filed: November 14, 1983
    Date of Patent: April 22, 1986
    Assignee: General Electric Company
    Inventors: Eric J. Pressman, Paul R. Willey