Patents by Inventor Maud Hellgren

Maud Hellgren 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: 5391161
    Abstract: An absorption material, preferably for use in disposable articles such as diapers, sanitary napkins or wound dressings, comprises 70-95% of at least one type of absorbing fibers, 2-20% of bonding fibers activated by heat, and 2-25% of a highly absorbent material, the absorption fibers and the highly absorbent material having been bonded into a coherent body by means of the binding fibers.
    Type: Grant
    Filed: November 3, 1992
    Date of Patent: February 21, 1995
    Assignee: Molnlycke AB
    Inventors: Maud Hellgren, Henry Zoller
  • Patent number: 4980226
    Abstract: A fibrous absorption body intended for use in disposable products such as diapers, sanitary napkins or wound dressings. The distinguishing feature of the inventive absorption body is that at least one type of absorbing fibers is included therein as well as a binder activated by heat, preferably in the form of bonding fibers; that the absorption fibers are bonded to a coherent body with the aid of the binder; and that the body, due to compression of its bulk volume, will obtain a continuous density gradient across its thickness which is retained both in a wet and a dry state.
    Type: Grant
    Filed: July 10, 1985
    Date of Patent: December 25, 1990
    Assignee: Molnlycke AB
    Inventors: Maud Hellgren, Henry Zoller
  • Patent number: 4818315
    Abstract: The present invention relates to a fibrous absorption body intended for use in disposable products such as diapers, sanitary napkins or wound dressings and also, in addition to such a novel and improved body, a method for its manufacture. The distinguishing feature of the inventive absorption body is that at least one type of absorbing fibers is included therein as well as a binder activated by heat, preferably in the form of bonding fibers; that the absorption fibers are bonded to a coherent body with the aid of the binder; and that its body, due to compression of its bulk volume, will obtain a continuous density gradient throughout said volume which is retained both in a wet and in a dry state.
    Type: Grant
    Filed: December 29, 1986
    Date of Patent: April 4, 1989
    Assignee: Molnlycke AB
    Inventors: Maud Hellgren, Henry Zoller