Patents by Inventor Leif Wallstrom

Leif Wallstrom 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
  • Publication number: 20090105676
    Abstract: Absorbent product, such as a diaper, a sanitary napkin or an incontinence product, whereby the product has odour control agent(s), and whereby the product has a wet zone, which is intended to store liquid during use, which zone is defined by the absorbent structure, a dry zone, which is intended to be substantially dry during use, which zone is defined by the outer edges, belt, elastics, backing sheet, wings and optionally outer part of the standing gathers, and an interfacing zone adjoining the wet zone, which is defined by the part(s) of the top sheet receiving liquid, optionally the inner part of the standing gathers, optionally an acquisition layer, and other parts adjoining the wet zone thereby occasionally being wet, wherein at least one substantially moisture-insensitive odour control agent is present in the wet zone and at least one odour control agent is present in the dry zone.
    Type: Application
    Filed: December 9, 2005
    Publication date: April 23, 2009
    Applicant: SCA HYGIENE PRODUCTS AB
    Inventors: Ulla Forsgren Brusk, Chatrine Stridfeldt, Leif Wallstrom
  • Publication number: 20080300561
    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: Application
    Filed: December 1, 2005
    Publication date: December 4, 2008
    Applicant: SCA HYGIENE PRODUCTS AB
    Inventors: Chatrine Stridfeldt, Leif Wallstrom
  • Publication number: 20080103467
    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: Application
    Filed: December 28, 2007
    Publication date: May 1, 2008
    Applicant: SCA HYGIENE PRODUCTS AB
    Inventors: Leif Wallstrom, Camilla Elfsberg, Solgun Drevik
  • Publication number: 20080103468
    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: Application
    Filed: December 28, 2007
    Publication date: May 1, 2008
    Applicant: SCA HYGIENE PRODUCTS AB
    Inventors: Camilla ELFSBERG, Leif Wallstrom
  • 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
  • Patent number: 5935682
    Abstract: A facing sheet (10) for absorbent articles is disclosed in the form of a laminate made up of at least a first layer (12) and a second layer (14). The first layer is intended to face a wearer when the absorbent article is in use and presents a plurality of through holes (16) delimited by an upper perimeter (18) and a lower perimeter (20) to thereby permit liquid to migrate through to the second layer (14). The second layer presents first depressions (22) which are arranged such that the lower perimeter (20) of each hole in the first layer (12) is aligned with an associated depression in the second layer (14). The invention further relates to a method which may be used to produce such a facing sheet.
    Type: Grant
    Filed: May 6, 1997
    Date of Patent: August 10, 1999
    Assignee: SCA Molnlycke AB
    Inventor: Leif Wallstrom
  • Patent number: 4762520
    Abstract: An absorbent article such as a sanitary napkin or a diaper comprises an absorption body (9) accommodated in a casing (11). The casing is composed of a carded fiber fabric made in one piece and containing at least 5% of melt fibers, preferably polypropylene, sub-divided into parallel streaks (1, 3, 4, 5, 6) having different melt-bonded patterns. There are thus provided streaks of varying structures which are adapted to their individual positioning in relation to the absorption body (9). The casing (11) seals around the absorption body (9) with at least two layers (6, 2) on the side of the absorption body facing the user, the outermost layer (2) having a substantially tighter bonding pattern than the inner, loosely bonded and voluminous layer(s).
    Type: Grant
    Filed: January 16, 1987
    Date of Patent: August 9, 1988
    Assignee: Molnlycke AB
    Inventor: Leif Wallstrom