Patents by Inventor Leif Wallström

Leif Wallström 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: 10058629
    Abstract: An absorbent article chosen from the group of diapers, panty liners, sanitary napkins and incontinence guards includes a liquid-pervious first sheet intended to face the wearer, a liquid-impervious second sheet intended to face away from the wearer, and a core part including an absorbent core arranged between the first and second sheets, wherein said core part at least partially is treated with a skincare agent.
    Type: Grant
    Filed: December 1, 2005
    Date of Patent: August 28, 2018
    Assignee: SCA HYGIENE PRODUCTS AB
    Inventors: Chatrine Stridfeldt, Leif Wallström
  • Patent number: 8153856
    Abstract: An absorbent article is defined by a pair of opposing longitudinal edges 20;22 and a pair of opposing transverse edges 24;26. An absorbent core 18 has at least a first 28 and a second 30 region, the average density of the absorbent core 18 in these first and second regions 28, 30 being lower than the average density of the absorbent core 18 surrounding said first and second regions 28;30, the first and second lower density regions 28;30 being arranged symmetrically about the longitudinal center line A of the article such that each of the first and second lower density regions 28;30 extends to the respective longitudinal edge 20;22 of the absorbent core. The distance ax varying along the longitudinal direction of the article. A minimum distance a1 is located at least in the transition 32 between the crotch portion 14 and the front portion 12.
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: April 10, 2012
    Assignee: SCA Hygiene Products AB
    Inventors: Leif Wallström, Camilla Elfsberg, Solgun Drevik
  • Patent number: 7825291
    Abstract: An absorbent article 10 has front 12, crotch 14 and rear 16 portions. The article has an absorbent core 18 of unitary construction and of uniform density, which is defined by a pair of opposing longitudinal edges 20;22 and a pair of opposing transverse edges 24;26. The absorbent core 18 has at least a first 28 and a second 30 region, the average thickness of the absorbent core 18 in these first and second regions 28, 30 being lower than the average thickness of the absorbent core 18 surrounding the first and second regions 28;30, the first and second lower thickness regions 28;30 being arranged symmetrically about the longitudinal center line A of the article such that each of the first and second lower thickness regions 28;30 extends to the respective longitudinal edge 20;22 of the absorbent core. The distance ax between the first and second lower thickness regions 28;30 in the transverse direction varying along the longitudinal direction of the article.
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: November 2, 2010
    Assignee: SCA Hygiene Products AB
    Inventors: Camilla Elfsberg, Leif Wallström
  • Patent number: 6974891
    Abstract: An absorbent structure in an absorbent article such as a diaper, incontinence guard, sanitary napkin, wound dressing, bed protection and the like, formed from at least two superposed layers (5?; 5?) of one or more web-shaped absorption materials (5), said layers (5?; 5?) having different widths as seen in the transverse direction of the article. The absorbent structure (4) made of said layers has been compressed to a thickness which is substantially the same over the width of the structure, in such a way that the structure has a higher density in the areas thereof where the layers overlap each other and a lower density in other areas.
    Type: Grant
    Filed: December 11, 2000
    Date of Patent: December 13, 2005
    Assignee: SCA Hygiene Products AB
    Inventor: Leif Wallström