Patents by Inventor Ebrahim Rezai

Ebrahim Rezai 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).

  • Publication number: 20080228158
    Abstract: An SBS based construction adhesive that includes an amount of SIS adhesive to make an SBS/SIS adhesive that shows excellent shear hang time values when used to manufacture disposable absorbent articles. The SBS/SIS adhesive is applied in a spiral pattern having a particular width and frequency to form an endflap seal that may reduce the likelihood of a gel on skin occurrence.
    Type: Application
    Filed: March 14, 2007
    Publication date: September 18, 2008
    Inventors: Shunketsu Sue, Ebrahim Rezai, Ravindra Palitha Ranatunga
  • Publication number: 20070005038
    Abstract: The present invention relates to disposable absorbent articles are useful for meeting this unmet need of producing disposable absorbent articles that include elastic members comprising elastomeric films manufactured with reduced equipment capital and associated expense. Such articles comprise: a) a liquid permeable topsheet; b) a backsheet; c) an absorbent core disposed between said topsheet and backsheet; and d) an incrementally stretched elastic member disposed adjacent said chassis wherein said member comprises a nonwoven carrier web adhesively bonded to an unapertured, skinless elastomeric layer.
    Type: Application
    Filed: June 29, 2006
    Publication date: January 4, 2007
    Inventors: Todd Mansfield, Ebrahim Rezai
  • Publication number: 20070005037
    Abstract: The present invention relates to a disposable absorbent article comprising a chassis having a front waist region, a back waist region, and a crotch region between the front and back waist regions, said chassis having two opposing longitudinal edges and two perpendicularly placed end edges, said chassis further comprising: a. a liquid permeable topsheet spanning at least the crotch region; b. a backsheet spanning at least the crotch region; c. an absorbent core disposed between said topsheet and backsheet; and d. a elastic member disposed along at least one opposing longitudinal edge in either the front waist or back waist region of said chassis wherein said member comprises an unapertured, skinless elastomeric layer wherein said layer exhibits an Energy Recovery Value of at least about 0.
    Type: Application
    Filed: June 29, 2006
    Publication date: January 4, 2007
    Inventors: Todd Mansfield, Ebrahim Rezai, James Bader, Adam Schmidtz
  • Publication number: 20050159719
    Abstract: The present invention is directed to a disposable absorbent article. The disposable absorbent article of the present invention includes a fluid storage layer disposed between the topsheet and backsheet and having a body-facing surface and a garment-facing surface opposing the body-facing surface. The fluid storage layer contains a superabsorbent material. The disposable absorbent article further includes an odor reduction layer disposed at either the body-facing surface side or the body-facing surface side of the fluid storage layer. The odor reduction layer contains a metalphthalocyanine material. The disposable absorbent article further includes an isolation means disposed between the superabsorbent material and the odor reduction layer for isolating the metalphthalocyanine material from contacting at least a part of the superabsorbent material.
    Type: Application
    Filed: March 14, 2005
    Publication date: July 21, 2005
    Inventors: Yoshihisa Kawakami, Vijay Rajagopalan, Kimio Ueda, Ebrahim Rezai
  • Patent number: 6878647
    Abstract: The present invention is directed to an elastic laminate which is elastically extensible in at least one direction. The elastic laminate includes an elastomeric material having a first surface and a second surface opposing the first surface; and a first nonwoven layer joined to the first surface of the elastomeric material. The first nonwoven layer is formed from component fibers having a primary fiber direction. The first nonwoven layer has a Fiber Orientation Ratio within about ±20 degrees from a primary fiber direction of at least about 65%. The present invention is also directed to a disposable garment employing such an elastic laminate.
    Type: Grant
    Filed: September 28, 1999
    Date of Patent: April 12, 2005
    Assignee: The Procter & Gamble Company
    Inventors: Ebrahim Rezai, Yoko Mizutani, Kazuyuki Ohnishi
  • Patent number: 6730387
    Abstract: An absorbent material having substantially improved structural stability in the dry and wet states. The absorbent materials are significantly less susceptible to handling losses of absorbent gelling particles during manufacturing operations. The absorbent material also is not subject to shifting of the absorbent gelling particles during or after swelling by fluids. The absorbent material comprises absorbent gelling particles comprising (a) a water-insoluble absorbent hydrogel-forming polymer; (b) a polycationic polymer bonded to the absorbent gelling particles at the surface thereof; (c) glue microfibers dispersed in the absorbent gelling particles; and (d) a carrier layer bonded to the absorbent gelling particles through the glue microfibers. The invention further relates to a method of making the absorbent materials, and the absorbent articles comprising the absorbent materials.
    Type: Grant
    Filed: October 12, 1998
    Date of Patent: May 4, 2004
    Assignee: The Procter & Gamble Company
    Inventors: Ebrahim Rezai, Kesyin Hsueh
  • Patent number: 6649808
    Abstract: A disposable absorbent article is disclosed, comprising a topsheet, a backsheet and an absorbent layer between the topsheet and the backsheet, wherein the backsheet is comprised of a microporous polymer film printed with a registered graphic and comprising by weight: from about 30% to about 60% of a polyolefin; and from about 40% to about 80% of calcium carbonate; wherein the film has a “b” value of between about 0 and about 0.5 and exhibits less than about 2% thermal shrinkage at about 50° C. and about 50% relative humidity for one week.
    Type: Grant
    Filed: June 6, 2000
    Date of Patent: November 18, 2003
    Assignee: The Procter & Gamble Company
    Inventors: Jie Tao, Ebrahim Rezai
  • Patent number: 6569136
    Abstract: Disclosed is a disposable absorbent article comprising a topsheet, a backsheet and an absorbent layer between the topsheet and the backsheet, wherein the backsheet is comprised of a microporous polymer film printed with multicolored graphics and a nonwoven material laminated to the film, wherein the film has a “b” value between about 0.0 and about 0.5 and exhibits less than about 4.0% thermal shrinkage at about 50° C. and about 50% relative humidity for one week.
    Type: Grant
    Filed: November 16, 2000
    Date of Patent: May 27, 2003
    Assignee: The Procter & Gamble Company
    Inventors: Jie Tao, Ebrahim Rezai
  • Publication number: 20030060112
    Abstract: An absorbent material having substantially improved structural stability in the dry and wet states. The absorbent materials are significantly less susceptible to handling losses of absorbent gelling particles during manufacturing operations. The absorbent material also is not subject to shifting of the absorbent gelling particles during or after swelling by fluids. The absorbent material comprises absorbent gelling particles comprising (a) a water-insoluble absorbent hydrogel-forming polymer; (b) a polycationic polymer bonded to the absorbent gelling particles at the surface thereof; (c) glue microfibers dispersed in the absorbent gelling particles; and (d) a carrier layer bonded to the absorbent gelling particles through the glue microfibers. The invention further relates to a method of making the absorbent materials, and the absorbent articles comprising the absorbent materials.
    Type: Application
    Filed: October 12, 1998
    Publication date: March 27, 2003
    Inventors: EBRAHIM REZAI, KESYIN HSUEH
  • Patent number: 6420627
    Abstract: The present invention is directed to a disposable absorbent article. The disposable absorbent article comprises a liquid previous topsheet; a liquid impervious backsheet combined with the topsheet; an absorbent core disposed between the topsheet and the backsheet; and a barrier cuff having a proximal edge and a distal edge, the proximal edge being joined to the topsheet and the distal edge being away from the top surface of the topsheet. The barrier cuff comprises a single layer web having a water resistance value of at least 150 mm H2O, and an average bending force value of less than about 25 mg cm2/cm.
    Type: Grant
    Filed: May 10, 2000
    Date of Patent: July 16, 2002
    Assignee: The Procter & Gamble Company
    Inventors: Kazuyuki Ohnishi, Ebrahim Rezai
  • Patent number: 6372952
    Abstract: The present invention relates in one aspect to absorbent articles that maintain or increase fluid acquisition rates when subjected to successive fluid loads. In another aspect, the invention relates to an absorbent article useful for absorbing discharges of aqueous body fluids which has a fluid pervious topsheet, a backsheet and an absorbent core, the absorbent core including at least one upper storage component in direct fluid communication with the topsheet capable of expanding in the z-direction to form a fluid acquisition zone when contacted with aqueous body fluids, the acquisition zone being at least partially surrounded by the upper fluid storage component and beneath the fluid discharge region of the core, and a fluid acquisition/distribution component having at least a portion positioned underneath and in fluid communication with the storage component and acquisition zone.
    Type: Grant
    Filed: March 22, 1996
    Date of Patent: April 16, 2002
    Assignee: The Procter & Gamble Company
    Inventors: Glen Ray Lash, Fumito Furukawa, John Joseph Litchholt, Ebrahim Rezai, Mattias Schmidt
  • Patent number: 6099950
    Abstract: An absorbent material comprising a mixture of (1) a plurality of absorbent gelling particles comprising a water-insoluble, water-swellable polymer, and (2) an absorbent property modification polymer reactive with at least one component included in a urine. The mixture is made by (i) applying a solution containing an organic solvent, water and the absorbent property modification polymer onto the plurality of absorbent gelling particles, wherein the weight ratio of the organic solvent to the water is at least 50:50, and (ii) removing a portion of the organic solvent and water from the applied absorbent gelling particles. When a urine is applied to the absorbent material, the absorbent gelling particles are spontaneously connective through the absorbent property modification polymer. The absorbent material has at least one of the improved absorbent properties after swelling such as (1) liquid permeability, (2) porosity, (3) wet integrity, and (4) recovery property when subjected to external forces.
    Type: Grant
    Filed: July 30, 1998
    Date of Patent: August 8, 2000
    Assignee: The Procter & Gamble Company
    Inventors: Lin Wang, Ebrahim Rezai, Yumiko Hayashi
  • Patent number: 6011196
    Abstract: An absorbent material with substantially improved liquid permeability such that it is not subject to gel blocking while maintaining a preferred absorbent capacity is disclosed. The absorbent material is in particulate form and is the reaction product of a water-insoluble, absorbent, hydrogel-forming polymer and a polycationic polymer, the reaction forming a covalent bond between the polymers. After the reaction, the absorbent material has a Saline Flow Conductivity greater than (500-11.5.multidot.GV)(10.sup.-7) cm.sup.3 sec/g where GV is the gel volume of the absorbent material.
    Type: Grant
    Filed: April 16, 1998
    Date of Patent: January 4, 2000
    Assignee: The Procter & Gamble Company
    Inventors: Lin Wang, Ebrahim Rezai, Yumiko Hayashi, Eui-Boo Cho
  • Patent number: 5985432
    Abstract: A porous absorbent material that comprises a water-insoluble, water-swellable absorbent polymer. The absorbent material comprises a polyether and/or a polycation bonded to the absorbent polymer whereby the contact angle of blood on a surface of the absorbent material attains from about 0 degree to about 40 degree. Because of the improved wettability with liquids as well as the porous structure, the absorbent material can provide higher absorbent characteristics with liquids, in particular with blood.
    Type: Grant
    Filed: January 6, 1997
    Date of Patent: November 16, 1999
    Assignee: The Procter & Gamble Company
    Inventors: Lin Wang, Ebrahim Rezai, Yumiko Hayashi
  • Patent number: 5977014
    Abstract: An absorbent composite structure suitable for absorbing aqueous body fluids is provided which includes a substrate having two surfaces, a plurality of hydrogel-forming polymer particles and a chemical cross-linking agent capable of bonding to both the substrate and the hydrogel-forming particles. In at least a substantial portion of the structure, the majority of the hydrogel-forming polymer particles are connected by the chemical cross-linking agent directly to at least one of the substrate surfaces. The absorbent composite structure can be incorporated into an absorbent article. A method of making the absorbent composite structure is also disclosed.
    Type: Grant
    Filed: March 10, 1997
    Date of Patent: November 2, 1999
    Assignee: The Procter & Gamble Company
    Inventors: Manfred Plischke, Mattias Schmidt, Ebrahim Rezai
  • Patent number: 5925299
    Abstract: A non-continuous absorbent core having a plurality of interconnected strands separated by voids. The strands comprise a porous absorbent macrostructure. The porous macrostructure has interconnected absorbent gelling particles that are surface crosslinked with cationic, preferably polymeric, amino-epichlorohydrin adducts. Upon contacting liquids such as water or body exudates (e.g., urine), the absorbent core can absorb the liquids without undesirable planer expansion. The core is useful in absorbent articles such as diapers, adult incontinence pads, and sanitary napkins are disclosed.
    Type: Grant
    Filed: June 24, 1997
    Date of Patent: July 20, 1999
    Assignee: The Procter & Gamble Company
    Inventors: Albert C. Dierckes, Jr., Kyoko Naga, Ebrahim Rezai, Yung-Wei Tai, Michael S. Kolodesh
  • Patent number: 5919411
    Abstract: A non-continuous absorbent composite having a plurality of interconnected strands separated by voids. The strands comprise a porous, absorbent macrostructure and a substrate. The porous macrostructure has interconnected absorbent gelling particles that are surface crosslinked with cationic, preferably polymeric, amino-epichlorohydrin adducts. Upon contacting liquids such as water or body exudates (e.g., urine), the absorbent composite can absorb the liquids without undesirable planer expansion. The composite is useful in absorbent articles such as diapers, adult incontinence pads, and sanitary napkins are disclosed.
    Type: Grant
    Filed: June 19, 1997
    Date of Patent: July 6, 1999
    Assignee: The Procter & Gamble Company
    Inventors: Ebrahim Rezai, Michael S. Kolodesh, Yung-Wei Tai, Kesyin Hsueh, Albert C. Dierckes, Jr., Kyoko Naga, Nancy A. Haynes
  • Patent number: 5868724
    Abstract: A non-continuous absorbent core having a plurality of interconnected strands separated by voids. The strands comprises a porous absorbent macrostructure. The porous macrostructure has interconnected absorbent gelling particles that are surface crosslinked with cationic, preferably polymeric, amino-epichlorohydrin adducts. Upon contacting liquids such as water or body exudates (e.g., urine), the absorbent core can absorb the liquids without undesirable planer expansion. The core is useful in absorbent articles such as diapers, adult incontinence pads, and sanitary napkins are disclosed.
    Type: Grant
    Filed: October 30, 1995
    Date of Patent: February 9, 1999
    Assignee: The Procter & Gamble Company
    Inventors: Albert C. Dierckes, Jr., Kyoko Naga, Ebrahim Rezai, Yung-Wei Tai, Michael S. Kolodesh, Nancy A. Haynes
  • Patent number: 5858535
    Abstract: An absorbent member comprising at least one region which comprises an absorbent material in a concentration of from about 60 to 100% by weight. The absorbent material has a improved physical property after swelling and comprises a mixture of (1) a plurality of absorbent gelling particles comprising a water-insoluble, water-swellable polymer, and (2) an absorbent property modification polymer reactive with at least one component included in a urine. When a urine is applied to the absorbent member, the absorbent gelling particles are spontaneously connective through the absorbent property modification polymer. The absorbent material has at least one of the improved absorbent properties after swelling such as (1) liquid permeability, (2) porosity, (3) wet integrity, and (4) recovery property when subjected to external forces.
    Type: Grant
    Filed: July 30, 1998
    Date of Patent: January 12, 1999
    Assignee: The Procter & Gamble Company
    Inventors: Lin Wang, Ebrahim Rezai, Yumiko Hayashi
  • Patent number: 5859074
    Abstract: Porous, absorbent macrostructures that comprise flexible interparticle bonded aggregates and are useful in absorbent articles such as diapers, adult incontinence pads, and sanitary napkins are disclosed. These porous macrostructures are treated with an effective amount of a latex to coat at least a portion of the particles comprising the bonded aggregate so as to impart increased flexibility to the macrostruture. This latex is capable of being sintered at a temperature of about 25.degree. C. or lower, is at least somewhat hydrophilic when sintered, and has a Tg of about 25.degree. C. or lower when sintered.
    Type: Grant
    Filed: May 9, 1997
    Date of Patent: January 12, 1999
    Assignee: The Procter & Gamble Co.
    Inventors: Ebrahim Rezai, Kesyin Hsueh, Motohiro Shimizu