Anthony M Giuffrida, Age 641708 Rhone St, Carson City, NV 89701

5308466, May 3, 1994

Feb 25, 1992

7/841021

Gary C. Ganzi - Lexington MA
Frederick Wilkins - Pepperill MA
Anthony J. Giuffrida - Andover MA
Christopher Griffin - Merrimack MA

IP Holding Company - Wilmington DE

B01D 6144
C02F 1469

204151

An electrodeionization apparatus is provided for removing ions from liquids. The apparatus is particularly well adapted for the removal of large, heavily hydrated, highly charged or weakly ionized molecules or complexes from feed water. Such removal is achieved by substituting, in at least one section of the apparatus, ion exchange membranes and/or resins having lower crosslinking and/or lower selectivity, for the ion exchange membranes commonly used in electrodeionization systems. Methods for reducing the electrical resistance across the membrane also are provided.

5316637, May 31, 1994

Aug 28, 1992

7/938329

Gary C. Ganzi - Lexington MA
Frederick Wilkins - Pepperill MA
Anthony J. Giuffrida - Andover MA
Christopher Griffin - Merrimack MA

IP Holding Company - Wilmington DE

B01D 6144

2041824

An electrodeionization apparatus is provided for removing ions from liquids. The apparatus is particularly well-adapted for the removal of large, heavily hydrated, highly charged or weakly ionized molecules or complexes from feed water. Such removal is achieved by substituting, in at least one section of the apparatus, ion exchange membranes and/or resins having lower crosslinking and/or lower selectivity, for the ion exchange membranes commonly used in electrodeionization systems. Methods for reducing the electrical resistance across the membrane also are provided.

5346924, Sep 13, 1994

Sep 23, 1992

7/949707

Anthony Giuffrida - North Andover MA

IP Holding Company - Wilmington DE

C08J 520
C08J 522

521 28

A novel, heterogeneous ion exchange membrane, methods for making such a membrane, and devices containing such a membrane are disclosed. Such membranes comprise linear low or linear medium density polyethylene or high molecular weight high density polyethylene as a binder and can incorporate a wide variety of ion exchange resin materials. The membranes can be fabricated using extrusion or other melt processing procedures to produce a product, which upon conditioning in water, exhibits properties adapted for use in numerous applications.

5211823, May 18, 1993

Jun 19, 1991

7/717460

Anthony J. Giuffrida - North Andover MA
Gary C. Ganzi - Lexington MA

Millipore Corporation - Bedford MA

B01D 6146
B01D 6158

2041824

Purified ion exchange resin particles are provided in a bifunctional electrodeionization step having anion depletion compartments containing anion exchange resin particles which are purified and cation depletion compartments containing cation exchange resin particle which are purified as well as ion concentration compartments. The bifunctional electrodeionization step for purifying resin particles is conducted under conditions to disassociate water into hydrogen ions and hydroxyl ions. Purified water having a purity of at least 1 megohm-cm is introduced into the anion depletion compartment and cation depletion compartments and water for accepting ionic impurities is introduced into the ion concentration compartments. The purified water is produced in an initial purification step which also can be an electrodeionization step. The water effluent from the anion depletion compartments and cation depletion compartments is recycled either to an initial water purification step or to the inlets of the anion depletion compartments or cation depletion compartments.

RE35741, Mar 10, 1998

Dec 27, 1996

8/778714

Yoram Oren - Beer Sheva, IL
Anthony J. Giuffrida - Andover MA
Stephen M. Ciaccio - Londonderry NH
Gary C. Ganzi - Lexington MA

Millipore Corporation - Bedford MA

B01D 6148

204524

A process is provided for removing ions from water which is passed through an ion depletion compartment of an electrodeionization apparatus. The electrodeionization apparatus contains an ion depletion compartment containing mixed ion exchange resin beads and an ion concentration compartment which may contain ion exchange resin beads in a given separation stage having an anode and a cathode. The anion resin beads and cation resin beads utilized each comprise beams of substantially uniform size. A second liquid is passed through the ion concentration compartment to collect ions under the influence of DC potential which pass from the depletion compartments into the concentration compartments through ion permeable membranes. The electrodeionization apparatus can be operated continuously since resin regeneration is not required.

6312577, Nov 6, 2001

Apr 14, 2000

9/549011

Gary C. Ganzi - Lexington MA
Frederick Wilkins - Pepperell MA
Anthony J. Giuffrida - North Andover MA

United State Filter Corporation - Palm Desert CA

B01D 6148

204524

A continuous electrodeionization apparatus and method. The continuous electrodeionization apparatus and method provide improved removal of weakly ionized ions, particularly silica. The apparatus and method involves using macroporous ion exchange resins that are both highly crosslinked and have a high water content. In preferred embodiments, the ion exchange resin beads also have a substantially uniform diameter.

3964985, Jun 22, 1976

Oct 29, 1974

5/518587

Anthony J. Giuffrida - North Andover MA

Ionics, Incorporated - Watertown MA

B01D 1302

204180P

An aqueous solution of a metal salt solution is converted to the corresponding acid by hydrogen ion substitution in a four compartment electrolytic cell containing three cation permselective membranes or barriers for defining the cell compartments. In one specific embodiment the salt solution initially treated in the intermediate compartment located adjacent to the cathode compartment is further treated by passing into the intermediate compartment located adjacent the anode compartment and thereafter removing the same as the final acid product. Such a flow arrangement prevents or reduces loss of hydrogen or citrate ions into the cathode compartment resulting in an increased acid yield with increased current efficiency.

4931160, Jun 5, 1990

Nov 23, 1988

7/275314

Anthony J. Giuffrida - North Andover MA

Millipore Corporation - Bedford MA

B01D 6146
B01D 6148
B01D 6150
B01D 6158

204301

An electrodeionization apparatus is provided for removing ions from liquids. Liquid to be purified is passed through at least two ion depletion compartments containing mixed anion and cation exchange resin beads in a given separation stage. A second liquid is passed through concentration compartments free of ion exchange resin beads. Ions under the influence of D. C. potential pass from the depletion compartments into the concentration compartments through ion permeable membranes. The beads in the depletion compartments are housed within subcompartments of controlled width and thickness and are retained therein by the ion permeable membranes which are secured to the walls of the subcompartments.