Patents by Inventor Romuald S. KRZYWANSKI

Romuald S. KRZYWANSKI 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).

  • Patent number: 10415189
    Abstract: 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: Grant
    Filed: August 23, 2018
    Date of Patent: September 17, 2019
    Assignee: RAYONIER PERFORMANCE FIBERS, LLC
    Inventors: Othman A. Hamed, Romuald S. Krzywanski
  • Publication number: 20190100879
    Abstract: 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: Application
    Filed: August 23, 2018
    Publication date: April 4, 2019
    Applicant: Rayonier Performance Fibers, LLC
    Inventors: Othman A. HAMED, Romuald S. KRZYWANSKI
  • Patent number: 10214858
    Abstract: 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: Grant
    Filed: April 13, 2017
    Date of Patent: February 26, 2019
    Assignee: RAYONIER PERFORMANCE FIBERS, LLC
    Inventors: Othman A. Hamed, Romuald S. Krzywanski
  • Publication number: 20180298559
    Abstract: 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: Application
    Filed: April 13, 2017
    Publication date: October 18, 2018
    Applicant: Rayonier Performance Fibers, LLC
    Inventors: Othman A. HAMED, Romuald S. KRZYWANSKI
  • Publication number: 20180223479
    Abstract: 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: Application
    Filed: February 7, 2017
    Publication date: August 9, 2018
    Applicant: Rayonier Performance Fibers, LLC
    Inventors: Othman A. HAMED, Romuald S. KRZYWANSKI
  • Patent number: 9650742
    Abstract: 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: Grant
    Filed: December 11, 2014
    Date of Patent: May 16, 2017
    Assignee: Rayonier Performance Fibers, LLC
    Inventors: Othman A. Hamed, Romuald S. Krzywanski
  • Patent number: 9382337
    Abstract: 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: Grant
    Filed: December 9, 2014
    Date of Patent: July 5, 2016
    Assignee: Rayonier Performance Fibers, LLC
    Inventors: Othman A. Hamed, Romuald S. Krzywanski
  • Publication number: 20160168796
    Abstract: 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: Application
    Filed: December 11, 2014
    Publication date: June 16, 2016
    Inventors: Othman A. HAMED, Romuald S. KRZYWANSKI
  • Publication number: 20160159931
    Abstract: 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: Application
    Filed: December 9, 2014
    Publication date: June 9, 2016
    Inventors: Othman A. HAMED, Romuald S. KRZYWANSKI