Patents by Inventor Iqbal Ahmed

Iqbal Ahmed 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).

  • Superabsorbent polymers
    Patent number: 5225506
    Abstract: Polymer compositions which are highly absorbent to aqueous electrolyte solutions are prepared by copolymerization of an ampholytic monomer having the formula of ##STR1## where one and only one of the substituted groups R.sub.1, R.sub.2, R.sub.3 and R.sub.4 must be a vinyl group, the rest can be the same or different and can be hydrogen or a C.sub.1 -C.sub.3 alkyl group; R.sub.5 is a phenyl group; n is .gtoreq.1 and .ltoreq.6; and q is 0 or 1; and an olefin monomer having an ethylenic structure as well as by graft copolymerization of at least an olefin monomer having an ethylenic structure and an ampholytic monomer having the formula disclosed above onto a main polymer selected from the group consisting of polysacchardies and polyolefins. Also disclosed is a process for absorbing large quantity of aqueous electrolyte solution employing the polymer compositions.
    Type: Grant
    Filed: April 24, 1992
    Date of Patent: July 6, 1993
    Assignee: Phillips Petroleum Company
    Inventors: Iqbal Ahmed, Henry L. Hsieh
  • Grafted copolymers highly absorbent to aqueous electrolyte solutions
    Patent number: 5219970
    Abstract: The present invention provides graft copolymers that are highly absorbent to aqueous electrolyte solutions.
    Type: Grant
    Filed: July 23, 1992
    Date of Patent: June 15, 1993
    Assignee: Phillips Petroleum Company
    Inventors: Iqbal Ahmed, Henry L. Hsieh
  • Superabsorbent crosslinked ampholytic ion pair copolymers
    Patent number: 5216098
    Abstract: The present invention provides crosslinked ampholytic copolymers that are highly absorbent to aqueous electrolyte solutions.
    Type: Grant
    Filed: July 21, 1992
    Date of Patent: June 1, 1993
    Assignee: Phillips Petroleum Company
    Inventors: Iqbal Ahmed, Henry L. Hsieh
  • Grafted copolymers highly absorbent to aqueous electrolyte solutions
    Patent number: 5214117
    Abstract: The present invention provides graft copolymers that are highly absorbent to aqueous electrolyte solutions.
    Type: Grant
    Filed: July 23, 1992
    Date of Patent: May 25, 1993
    Assignee: Phillips Petroleum Company
    Inventors: Iqbal Ahmed, Henry L. Hsieh
  • Grafted copolymers highly absorbent to aqueous electrolyte solutions
    Patent number: 5206326
    Abstract: The present invention provides graft copolymers that are highly absorbent to aqueous electrolyte solutions.
    Type: Grant
    Filed: July 21, 1992
    Date of Patent: April 27, 1993
    Assignee: Phillips Petroleum Company
    Inventors: Iqbal Ahmed, Henry L. Hsieh
  • Superabsorbent crosslinked ampholytic ion pair copolymers
    Patent number: 5130391
    Abstract: The present invention provides crosslinked ampholytic copolymers that are highly absorbent to aqueous electrolyte solutions.
    Type: Grant
    Filed: October 31, 1990
    Date of Patent: July 14, 1992
    Assignee: Phillips Petroleum Company
    Inventors: Iqbal Ahmed, Henry L. Hsiehp
  • Superabsorbent crosslinked ampholytic ion pair copolymers containing 2-methacryloyloxyethyldimethylammonium
    Patent number: 5130389
    Abstract: The present invention provides crosslinked ampholytic copolymers that are highly absorbent to aqueous electrolyte solutions.
    Type: Grant
    Filed: October 12, 1990
    Date of Patent: July 14, 1992
    Assignee: Phillips Petroleum Company
    Inventors: Iqbal Ahmed, Henry L. Hsieh
  • Superabsorbent crosslinked ampholytic ion pair copolymers
    Patent number: 5110887
    Abstract: The present invention provides an article of manufacture which contains a crosslinked ampolytic copolymer that is highly absorbent to aqueous electrolyte solutions.
    Type: Grant
    Filed: September 18, 1991
    Date of Patent: May 5, 1992
    Assignee: Phillips Petroleum Company
    Inventors: Henry L. Hsieh, Iqbal Ahmed
  • Superabsorbent crosslinked ampholytic ion pair copolymers
    Patent number: 5106929
    Abstract: The present invention provides crosslinked ampholytic ion pair (2-methacryloyloxyethyldiethylammonium cation (MEDEA)/sulfonate anion) copolymers that are highly absorbent to aqueous electrolyte solutions.
    Type: Grant
    Filed: October 1, 1990
    Date of Patent: April 21, 1992
    Assignee: Phillips Petroleum Company
    Inventors: Iqbal Ahmed, Henry Hsieh
  • Superabsorbent crosslinked ampholytic ion pair copolymers
    Patent number: 5098970
    Abstract: The present invention provides crosslinked ampolytic copolymers that are highly absorbent to aqueous electrolyte solutions.
    Type: Grant
    Filed: October 31, 1990
    Date of Patent: March 24, 1992
    Assignee: Phillips Petroleum Company
    Inventors: Henry L. Hsieh, Iqbal Ahmed
  • Superabsorbent crosslinked ampholytic ion pair copolymers
    Patent number: 5075399
    Abstract: The present invention provides crosslinked ampholytic copolymers that are highly absorbent to aqueous electrolyte solutions.
    Type: Grant
    Filed: November 15, 1990
    Date of Patent: December 24, 1991