Patents by Inventor Samuel S. Alexander

Samuel S. Alexander 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).

  • High ion exchange capacity polyelectrolytes having high crosslink densities and caustic stability
    Patent number: 5284879
    Abstract: A water or alcohol-water soluble divinyl monomer having anion exchange group(s) and a free exchangable anion is disclosed. These bifunctional divinyl monomers are capable of forming ion exchange materials (membranes and ion exchange resin beads) upon polymerization with added vinyl catalysts which convert them into insoluble and infusible polymers. They are also capable of being co-polymerized with other ion exchange (ion containing) monomers to give unique anion exchange resins or membranes.
    Type: Grant
    Filed: March 26, 1992
    Date of Patent: February 8, 1994
    Assignee: Ionics, Incorporated
    Inventors: Russell B. Hodgdon, Russell J. MacDonald, Samuel S. Alexander
  • Process for manufacturing continuous supported ion selective membranes using non-polymerizable high boiling point solvents
    Patent number: 5264125
    Abstract: This invention pertains to processes for manufacturing in an environmentally friendly way, continuous, supported ion exchange membranes from (I) liquids containing vinyl and related monomeric electrolytes and high boiling solvents therefor, said solvents also being swelling agents for said membranes; and (II) an indefinitely long, foraminous substrate and to the products of such processes.
    Type: Grant
    Filed: April 20, 1992
    Date of Patent: November 23, 1993
    Assignee: Ionics' Incorporated
    Inventors: Russell J. MacDonald, Russell B. Hodgdon, Samuel S. Alexander
  • Process for manufacturing continuous supported ion selective membranes using non-polymerizable high boiling point solvents
    Patent number: 5145618
    Abstract: Processes for manufacturing in an environmentally friendly way, continuous, supported ion exchange membranes from (I) liquids containing vinyl and related monomeric electrolytes and high boiling solvents, the solvents also being swelling agents for the membranes; and (II) an indefinitely long, foraminous substrate.
    Type: Grant
    Filed: August 23, 1990
    Date of Patent: September 8, 1992
    Assignee: Ionics, Incorporated
    Inventors: Russell J. MacDonald, Russell B. Hodgdon, Samuel S. Alexander
  • High ion exchange capacity polyelectrolytes having high crosslink densities and caustic stability
    Patent number: 5118717
    Abstract: A water or alcohol-water soluble divinyl monomer having anion exchange group(s) and a free exchangeable anion is disclosed. These bifunctional divinyl monomers are capable of forming ion exchange materials (membranes and ion exchange resin beads) upon polymerization with added vinyl catalysts which convert them into insoluble and infusible polymers. They are also capable of being co-polymerized with other ion exchange (ion containing) monomers to give unique anion exchange resins or membranes.
    Type: Grant
    Filed: February 13, 1990
    Date of Patent: June 2, 1992
    Assignee: Ionics, Incorporated
    Inventors: Russell B. Hodgdon, Russell J. MacDonald, Samuel S. Alexander
  • Novel bipolar membranes and process of manufacture
    Patent number: 4851100
    Abstract: Improved bipolar membranes comprised of two laminates, one a long term base stable thermoset anion exchange membrane and the other a strongly solvent bonded (solvent cast) thermoplastic water insoluble cation exchange membrane. The membranes have a useful level of acid and base efficiencies at low water splitting voltages, along with high current densities.
    Type: Grant
    Filed: May 2, 1988
    Date of Patent: July 25, 1989
    Assignee: Ionics, Incorporated
    Inventors: Russell B. Hodgdon, Samuel S. Alexander
  • Electrodialysis membranes of high interstitial molality based upon methacrylate ester derivatives
    Patent number: 4231855
    Abstract: This invention relates to cross-linked copolymers of methacrylate esters containing ionogenic functional groups capable of being converted into high efficiency electro-dialysis membranes. Such totally aliphatic polymer membranes have been found to give electrical resistances which can be as low as one half that of membranes previously synthesized as well as higher interstitial molality. This reduced resistance, in concert with a high degree of chemical and physical stability enables water desalination by electrodialysis to be performed over longer periods of useful membrane life and at a lower expenditure of electrical energy per thousand gallons of water desalted.
    Type: Grant
    Filed: March 2, 1979
    Date of Patent: November 4, 1980
    Assignee: Ionics, Incorporated
    Inventors: Russell B. Hodgdon, Samuel S. Alexander