Patents by Inventor Andre S. Hajnal

Andre S. Hajnal 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).

  • Pulp and fibrillated fiber composite
    Patent number: 9212435
    Abstract: A cellulose pulp sheet is provided that is formed from never-dried kraft pulp and fibrillated fibers, such as lyocell. The pulp sheet provides several beneficial features as a result of both the use of fibrillated fibers and never-dried kraft pulp, particularly when the pulp sheet is used to form air-laid absorbent materials that include superabsorbent polymers.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: December 15, 2015
    Assignee: Weyerhaeuser NRCompany
    Inventors: Brent A. Petersen, Andrew J. Dodd, Andre S. Hajnal, Noriko Suzuki
  • Cellulose fibrillation
    Patent number: 8915457
    Abstract: A process for making a fibrillated blend of lyocell and cellulose pulp fibers in which a blend of lyocell and cellulose pulp fibers is provided. The lyocell is from 25% to 75% of the total weight of the blend of lyocell and cellulose pulp fibers. The blend is refined in a high shear field device to provide a blend of fibrillated lyocell and pulp fibers having a diameter of 10 to 500 nanometers and a fiber length of 50 to 500 ?m. The high shear field device can be a homogenizer or colloid mill.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: December 23, 2014
    Assignee: Weyerhaeuser NR Company
    Inventors: Andrew J. Dodd, Andre S. Hajnal
  • PULP AND FIBRILLATED FIBER COMPOSITE
    Publication number: 20140004326
    Abstract: A cellulose pulp sheet is provided that is formed from never-dried kraft pulp and fibrillated fibers, such as lyocell. The pulp sheet provides several beneficial features as a result of both the use of fibrillated fibers and never-dried kraft pulp, particularly when the pulp sheet is used to form air-laid absorbent materials that include superabsorbent polymers.
    Type: Application
    Filed: June 29, 2012
    Publication date: January 2, 2014
    Applicant: WEYERHAEUSER NR COMPANY
    Inventors: Brent A. Petersen, Andrew J. Dodd, Andre S. Hajnal, Noriko Suzuki
  • Pulp for Odor Control
    Publication number: 20100319865
    Abstract: A wood pulp useful for odor control in absorbent products. It incorporates a biocide or a biocide and essential oils.
    Type: Application
    Filed: May 19, 2010
    Publication date: December 23, 2010
    Applicant: WEYERHAEUSER NR COMPANY
    Inventors: Brent A. Petersen, Shahrokh A. Naieni, JAMES F. LINCOLN, Ericka Marsh, Wayne Fass, ANDRE S. HAJNAL
  • Fibrous web having improved strength and method of making the same
    Patent number: 5837627
    Abstract: A web of fibers is bound together by a bonding medium that has been activated by partially solubilizing the bonding medium with a solvent therefor. The fibers are insoluble in the bonding medium. As the bonding medium is partially solubilized, it becomes tacky and flows into contact with the fibers and with itself Thereafter, the solvent is absorbed by the bonding medium, allowing the bonding medium to resolidify and bond the fibers in a matrix, increasing the web strength.
    Type: Grant
    Filed: January 13, 1997
    Date of Patent: November 17, 1998
    Assignee: Weyerhaeuser Company
    Inventors: Donald D. Halabisky, Hugh West, Andre S. Hajnal, Terry M. Grant