Patents by Inventor Othman A. Hamed
Othman A. Hamed 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).
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Patent number: 10415189Abstract: The present invention is directed to a novel polyalkylene glycol based reagent with aldehyde end groups, wherein the preparation of the reagent includes the steps of provide a polyalkylene glycol; provide an aldehyde compound; mix both reagents polyalkylene glycol and aldehyde in 1:2 equivalent; stir the mixture for a certain period of time until a clear solution is obtained, and dilute with water to a desirable concentration.Type: GrantFiled: August 23, 2018Date of Patent: September 17, 2019Assignee: RAYONIER PERFORMANCE FIBERS, LLCInventors: Othman A. Hamed, Romuald S. Krzywanski
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Patent number: 10344430Abstract: A method for making a specialty fiber by activating pulp in an alkaline aqueous medium, then reacting it a water-soluble, multi-functional reagent able to bridge neighboring cellulose chain within a single fiber. The resultant specialty cellulose fibers have high intrinsic viscosity and may be used to make cellulose ethers, cellulose acetate, and viscose.Type: GrantFiled: November 21, 2017Date of Patent: July 9, 2019Assignee: RAYONIER PERFORMANCE FIBERS, LLCInventors: Othman A. Hamed, Romuald Krzywanski
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Publication number: 20190100879Abstract: The present invention is directed to a novel polyalkylene glycol based reagent with aldehyde end groups, wherein the preparation of the reagent includes the steps of provide a polyalkylene glycol; provide an aldehyde compound; mix both reagents polyalkylene glycol and aldehyde in 1:2 equivalent; stir the mixture for a certain period of time until a clear solution is obtained, and dilute with water to a desirable concentration.Type: ApplicationFiled: August 23, 2018Publication date: April 4, 2019Applicant: Rayonier Performance Fibers, LLCInventors: Othman A. HAMED, Romuald S. KRZYWANSKI
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Patent number: 10214858Abstract: The present invention relates to specialty pulp products produced using bifunctional reagents composed of polymeric chain and end caps. The polymeric chain is preferably a polyalkylene glycol based polymer and the end caps are preferably a cationic quaternary ammonium. The bifunctional reagents are especially useful in making specialty fluff with dual functional properties—easy defiberization and antimicrobial properties. The specialty fluff of the present invention prevents odor by inhibiting bacteria growth and production of organic matters, especially when used in an absorbent article intended for body waste management such as baby diapers and adult incontinence device.Type: GrantFiled: April 13, 2017Date of Patent: February 26, 2019Assignee: RAYONIER PERFORMANCE FIBERS, LLCInventors: Othman A. Hamed, Romuald S. Krzywanski
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Publication number: 20180298559Abstract: The present invention relates to specialty pulp products produced using bifunctional reagents composed of polymeric chain and end caps. The polymeric chain is preferably a polyalkylene glycol based polymer and the end caps are preferably a cationic quaternary ammonium. The bifunctional reagents are especially useful in making specialty fluff with dual functional properties—easy defiberization and antimicrobial properties. The specialty fluff of the present invention prevents odor by inhibiting bacteria growth and production of organic matters, especially when used in an absorbent article intended for body waste management such as baby diapers and adult incontinence device.Type: ApplicationFiled: April 13, 2017Publication date: October 18, 2018Applicant: Rayonier Performance Fibers, LLCInventors: Othman A. HAMED, Romuald S. KRZYWANSKI
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Publication number: 20180223479Abstract: The present invention relates to a dual function reagent composed of a polymeric chain and end caps, transfer fibers made from cellulose fibers and the dual function reagent, a liquid transfer layer made from the transfer fibers, and absorbent articles incorporating the liquid transfer layer. Embodiments of the present invention also relate to methods of making and using the dual function reagent, transfer fibers, transfer layer and absorbent articles.Type: ApplicationFiled: February 7, 2017Publication date: August 9, 2018Applicant: Rayonier Performance Fibers, LLCInventors: Othman A. HAMED, Romuald S. KRZYWANSKI
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Publication number: 20180135244Abstract: A method for making a specialty fiber by activating pulp in an alkaline aqueous medium, then reacting it a water-soluble, multi-functional reagent able to bridge neighboring cellulose chain within a single fiber. The resultant specialty cellulose fibers have high intrinsic viscosity and may be used to make cellulose ethers, cellulose acetate, and viscose.Type: ApplicationFiled: November 21, 2017Publication date: May 17, 2018Applicant: Rayonier Performance Fibers, LLCInventors: Othman A. HAMED, Romuald KRZYWANSKI
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Patent number: 9828725Abstract: A method for making a specialty fiber by activating pulp in an alkaline aqueous medium, then reacting it a water-soluble, multi-functional reagent able to bridge neighboring cellulose chain within a single fiber. The resultant specialty cellulose fibers have high intrinsic viscosity and may be used to make cellulose ethers, cellulose acetate, and viscose.Type: GrantFiled: November 16, 2016Date of Patent: November 28, 2017Assignee: RAYONIER PERFORMANCE FIBERS, LLCInventors: Othman A. Hamed, Romuald Krzywanski
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Patent number: 9650742Abstract: A process for making a hydrogel forming material from a kraft or sulfite pulping process cellulosic pulp slurry by extracting hemicellulose heteropolymers from the cellulosic pulp slurry as a hemicaustic extract by treating the cellulosic pulp slurry with a cold caustic solution, then isolating the hemicaustic extract and preparing a mixture of the hemicellulose extract and a derivatizing agent comprised of a monofunctional etherifying agent and/or a polyfunctional organic cross-linking agent, and reacting the mixture to produce the hydrogel forming material. A polyvalent metal cross-linking agent can optionally be reacted with the hydrogel forming material to enhance its gel strength.Type: GrantFiled: December 11, 2014Date of Patent: May 16, 2017Assignee: Rayonier Performance Fibers, LLCInventors: Othman A. Hamed, Romuald S. Krzywanski
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Patent number: 9382337Abstract: A process for making a hydrogel forming material from an unbleached cellulose pulp comprised of isolating pulp fines from the cellulose pulp by screening and/or dissolved air filtration, reacting the isolated pulp fines with alkaline hydroxide to form an alkali cellulose composition, preparing a heterogeneous mixture of the alkali cellulose composition and an etherifying agent, and optionally organic cross-linking agent, and reacting the components of the mixture to produce a hydrogel forming material. A polyvalent metal cross-linking agent can optionally be reacted with the hydrogel forming material to enhance its gel strength.Type: GrantFiled: December 9, 2014Date of Patent: July 5, 2016Assignee: Rayonier Performance Fibers, LLCInventors: Othman A. Hamed, Romuald S. Krzywanski
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Publication number: 20160168796Abstract: A process for making a hydrogel forming material from a kraft or sulfite pulping process cellulosic pulp slurry by extracting hemicellulose heteropolymers from the cellulosic pulp slurry as a hemicaustic extract by treating the cellulosic pulp slurry with a cold caustic solution, then isolating the hemicaustic extract and preparing a mixture of the hemicellulose extract and a derivatizing agent comprised of a monofunctional etherifying agent and/or a polyfunctional organic cross-linking agent, and reacting the mixture to produce the hydrogel forming material. A polyvalent metal cross-linking agent can optionally be reacted with the hydrogel forming material to enhance its gel strength.Type: ApplicationFiled: December 11, 2014Publication date: June 16, 2016Inventors: Othman A. HAMED, Romuald S. KRZYWANSKI
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Publication number: 20160159931Abstract: A process for making a hydrogel forming material from an unbleached cellulose pulp comprised of isolating pulp fines from the cellulose pulp by screening and/or dissolved air filtration, reacting the isolated pulp fines with alkaline hydroxide to form an alkali cellulose composition, preparing a heterogeneous mixture of the alkali cellulose composition and an etherifying agent, and optionally organic cross-linking agent, and reacting the components of the mixture to produce a hydrogel forming material. A polyvalent metal cross-linking agent can optionally be reacted with the hydrogel forming material to enhance its gel strength.Type: ApplicationFiled: December 9, 2014Publication date: June 9, 2016Inventors: Othman A. HAMED, Romuald S. KRZYWANSKI
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Patent number: 8574683Abstract: An odor-inhibiting fiber having a cellulosic fiber and an odor-inhibiting formulation. The odor-inhibiting formulation may contain an odor-inhibiting agent, such as a biocide, an enzyme, a urease inhibitor. The odor-inhibiting formulation also may contain a liquid carrier such as a hydrophobic or hydrophilic organic liquid, or a mixture of a hydrophobic and hydrophilic organic liquid. The cellulosic fiber is impregnated with the odor-inhibiting formulation to produce fiber having odor-inhibiting characteristics. The resultant odor-inhibiting fiber is useful in making absorbent articles with odor-inhibiting characteristics. The fiber of the embodiments prevents odor by inhibiting bacteria growth and ammonia production, especially when used in an absorbent article such as a diaper or adult incontinence device.Type: GrantFiled: February 16, 2012Date of Patent: November 5, 2013Assignee: Rayonier TRS Holdings, Inc.Inventors: Othman A. Hamed, Harry J. Chmielewski
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Publication number: 20120148518Abstract: An odor-inhibiting fiber having a cellulosic fiber and an odor-inhibiting formulation. The odor-inhibiting formulation may contain an odor-inhibiting agent, such as a biocide, an enzyme, a urease inhibitor. The odor-inhibiting formulation also may contain a liquid carrier such as a hydrophobic or hydrophilic organic liquid, or a mixture of a hydrophobic and hydrophilic organic liquid. The cellulosic fiber is impregnated with the odor-inhibiting formulation to produce fiber having odor-inhibiting characteristics. The resultant odor-inhibiting fiber is useful in making absorbent articles with odor-inhibiting characteristics. The fiber of the embodiments prevents odor by inhibiting bacteria growth and ammonia production, especially when used in an absorbent article such as a diaper or adult incontinence device.Type: ApplicationFiled: February 16, 2012Publication date: June 14, 2012Applicant: Rayonier TRS Holdings Inc.Inventors: Othman A. Hamed, Harry J. Chmielewski
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Patent number: 8138106Abstract: An odor-inhibiting fiber having a cellulosic fiber and an odor-inhibiting formulation. The odor-inhibiting formulation may contain an odor-inhibiting agent, such as a biocide, an enzyme, a urease inhibitor. The odor-inhibiting formulation also may contain a liquid carrier such as a hydrophobic or hydrophilic organic liquid, or a mixture of a hydrophobic and hydrophilic organic liquid. The cellulosic fiber is impregnated with the odor-inhibiting formulation to produce fiber having odor-inhibiting characteristics. The resultant odor-inhibiting fiber is useful in making absorbent articles with odor-inhibiting characteristics. The fiber of the embodiments prevents odor by inhibiting bacteria growth and ammonia production, especially when used in an absorbent article such as a diaper or adult incontinence device.Type: GrantFiled: September 30, 2005Date of Patent: March 20, 2012Assignee: Rayonier TRS Holdings Inc.Inventors: Othman A. Hamed, Harry J. Chmielewski
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Patent number: 7854822Abstract: A plasticizing formulation for producing plasticized fluff pulp. The plasticizing formulation, which preferably is an aqueous solution, includes a primary plasticizing agent, and optionally a secondary plasticizing agent. Preferably, the primary plasticizing agent is 1,4-cyclohexanedimethanol, and the secondary plasticizing agent is triacetin. When the plasticizing formulation is applied to a cellulosic fluff pulp, a plasticized fluff pulp is produced. The resultant plasticized fluff pulp may have one or more of the following: reduced Kamas energy, Mullen strength, and fiber knot and nit contents, when compared to the base cellulosic fluff pulp fiber that is not plasticized.Type: GrantFiled: December 2, 2004Date of Patent: December 21, 2010Assignee: Rayonier TRS Holdings Inc.Inventors: Harry J. Chmielewski, Othman A. Hamed, Michael Haeussler
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Patent number: 7686921Abstract: A liquid distribution mat that is a wet-laid mat of enhanced cellulosic fibers that are cellulosic fibers cross-linked in sheet form, as well as methods of making the liquid distribution mat. The liquid distribution mat has high vertical wicking properties and excellent structural integrity in both wet and dry states. The liquid distribution mat is suitable for use in an absorbent article. When used in an absorbent article such as a baby diaper, the liquid distribution mat rapidly acquires and transports bodily discharges from the point of insult to other regions of the absorbent article, thereby maximizing the utilization of the absorbent article.Type: GrantFiled: May 1, 2006Date of Patent: March 30, 2010Assignee: Rayonier TRS Holding Inc.Inventors: Othman A. Hamed, Harry J. Chmielewski
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Patent number: 7419568Abstract: The present invention relates to cross-linked cellulosic fiber having improved absorbency characteristics when compared to conventional cross-linked fibers. The cross-linked cellulosic fiber is obtainable by reacting pulp in the sheet or fluff form with one or more reagents selected from organic molecule having acid and aldehyde functional groups “acid aldehydes.” The invention also relates to a method of producing the cross-linked fiber. The method includes heating the treated cellulosic fibers to promote intrafiber cross-linking. The cross-linked fibers are characterized by having an improved centrifuge retention capacity, fluid acquisition rate, resiliency, absorbent capacity, absorbency under load, and other absorbent properties. The inventive cross-linked fibers are useful in forming absorbent composites, and in particular absorbent cores for use in absorbent articles.Type: GrantFiled: June 21, 2005Date of Patent: September 2, 2008Assignee: Rayonier TRS Holdings Inc.Inventors: Othman A. Hamed, Harry J. Chmielewski, Dana B. McBee
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Patent number: 7320740Abstract: The present invention relates to cross-linked cellulosic fiber having improved absorbency characteristics when compared to conventional cross-linked fibers. The cross-linked cellulosic fiber is obtainable by reacting pulp in the sheet or fluff form with one or more reagents selected from organic molecule having acid and aldehyde functional groups “acid aldehydes.” The invention also relates to a method of producing the cross-linked fiber. The method includes heating the treated cellulosic fibers to promote intrafiber cross-linking. The cross-linked fibers are characterized by having an improved centrifuge retention capacity, fluid acquisition rate, resiliency, absorbent capacity, absorbency under load, and other absorbent properties. The inventive cross-linked fibers are useful in forming absorbent composites, and in particular absorbent cores for use in absorbent articles.Type: GrantFiled: June 21, 2005Date of Patent: January 22, 2008Assignee: Rayonier TRS Holdings Inc.Inventors: Othman A. Hamed, Harry J. Chmielewski, Dana B. McBee
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Patent number: 7312297Abstract: A treatment composition for making acquisition fluff pulp in sheet form, having a cross-linking agent and an anti-hydrogen-bonding agent. The cross-linking agent may be a polycarboxylic acid, aldehyde, urea-based derivatives or a mixture thereof. The anti-hydrogen-bonding agent may be a silicon polymer terminated with at least one quaternary amine functional group. A method of making acquisition fluff pulp using the treatment composition involves treating a cellulosic base fiber with a treatment composition solution to impregnate the fiber with the treatment composition, and then drying and curing the impregnated fiber. The resultant acquisition fluff pulp may be utilized in an acquisition layer and/or an absorbent core of an absorbent article intended for body waste management.Type: GrantFiled: February 16, 2005Date of Patent: December 25, 2007Assignee: Rayonier TRS Holdings, Inc.Inventor: Othman A. Hamed