WO1991011978A1 - An absorbent body incorporating two layers which contain different superabsorbents - Google Patents

An absorbent body incorporating two layers which contain different superabsorbents Download PDF

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Publication number
WO1991011978A1
WO1991011978A1 PCT/SE1991/000101 SE9100101W WO9111978A1 WO 1991011978 A1 WO1991011978 A1 WO 1991011978A1 SE 9100101 W SE9100101 W SE 9100101W WO 9111978 A1 WO9111978 A1 WO 9111978A1
Authority
WO
WIPO (PCT)
Prior art keywords
fluff
superabsorbent
layer
absorbent body
liquid
Prior art date
Application number
PCT/SE1991/000101
Other languages
English (en)
French (fr)
Inventor
Lars Gustafsson
Stefan Areskoug
Magnus Qvist
Original Assignee
Mölnlycke AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=20378563&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO1991011978(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Mölnlycke AB filed Critical Mölnlycke AB
Priority to DE69112430T priority Critical patent/DE69112430T2/de
Priority to EP91904290A priority patent/EP0592401B1/en
Priority to AU72514/91A priority patent/AU644628B2/en
Priority to CA002075963A priority patent/CA2075963C/en
Publication of WO1991011978A1 publication Critical patent/WO1991011978A1/en
Priority to FI923616A priority patent/FI101766B/sv
Priority to NO923172A priority patent/NO178603C/no
Priority to GR950402416T priority patent/GR3017292T3/el

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/534—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F2013/530007—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium being made from pulp
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F2013/530481—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials
    • A61F2013/530489—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials being randomly mixed in with other material
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F2013/530481—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials
    • A61F2013/53051—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials being only in particular parts or specially arranged
    • A61F2013/530547—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials being only in particular parts or specially arranged positioned in a separate layer or layers
    • A61F2013/530554—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials being only in particular parts or specially arranged positioned in a separate layer or layers and being fixed to a web
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F2013/530481—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials
    • A61F2013/530708—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials characterized by the absorbency properties
    • A61F2013/530737—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials characterized by the absorbency properties by the absorbent capacity
    • A61F2013/530766—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials characterized by the absorbency properties by the absorbent capacity by the cross-link factor

Definitions

  • the present invention relates to an absorbent body or pad for use in diapers, incontinence guards or like articles.
  • the absorbent pad of a diaper has a high absorption rate.
  • the absorbent pad will normally exhibit a high absorption rate when dry, since the pulp core will then enclose a sufficient quantity of air which can be displaced rapidly and replaced with urine.
  • the fibres of the fluff mat in a dry absorbent pad are relatively rigid and are therewith able to withstand a certain amount of weight before becoming compressed.
  • the fibres lose much of their ability to withstand weight or pressure when the pad is wet, therewith causing the fluff mat to collapse.
  • superabsorbents are able to absorb large quantities of urine, about 3-5 times the absorbency of fluff. Although this ability can be utilized, it is not particularly effective when solely one absorption ability is exchanged for the other. Super ⁇ absorbents can also contribute to other properties, such as improved surface dryness, etc. , for instance.
  • the present invention provides a solution to this problem.
  • the inventive absorbent pad is characterized in that the pad includes a first layer of fluff which, when the article is in use, lies nearest the wearer, a first super absorbent which is disposed in said fluff layer and which has a high degree of cross-linking and therewith the ability to swell while being substantially un ⁇ affected by normally occurring pressures, whereby subsequent to liquid absorption the collapsed pulp is loosened and again forms an air-containing voluminous fluff layer, and in that the absorbent pad includes a second layer in which there is disposed a second super- absorbent whose liquid absorbing capacity is greater than that of the first superabsorbent.
  • a highly cross-linked superabsorbent shall improve the rate at which a subse ⁇ quent liquid discharge is absorbed, by loosening or "fluffing" the collapsed fluff mat and increasing the total volume of the wet region.
  • a superabsorbent which is so highly cross-linked that it can swell while being substantially unaffected by normally occurring pressures has a lower absorbency than a superabsorbent which has a lower degree of cross-linking. Consequently, the inventive absorbent pad includes a second layer which incorporates a second superabsorbent having a higher liquid absorbing capacity.
  • Figures 1 and 2 illustrate schematically the state of a cross- linked superabsorbent contained in a fluff mat, both before and after liquid absorption
  • Figures 3 and 4 illustrate the corresponding states of a fluff mat containing a highly cross-linked superabsorbent.
  • Figure 1 illustrates a fluff layer 1 in which grains or particles of cross-linked superabsorbent 2 are mixed.
  • the fluff mat illustrated in Figure 1 is in a dry, voluminous state with an abundancy of air between the fibres.
  • the absorbent pad shown in Figure 1 can there ⁇ fore rapidly absorb liquid penetrating into the pad. When the fluff mat becomes wet, it collapses under the weight of absorbed liquid and under the pressure exerted by external loads and if no superabsorbents were present the collapsed fluff mat would discharge liquid when the absorbent pad is subjected to further, external pressures.
  • the superabsorbents present in the fluff mat 1 take liquid from the fluff by suction and increase in size, by swelling.
  • the superabsorbents 2 are cross-linked to an extent such as to possess suffi ⁇ cient gel strength to retain absorbed liquid under normal pressure in use, i.e. normal pressures on the absorbent pad of a diaper. As illustrated in Figure 2, the superabsorbents 2 do not form a continuous gel, but remain in the form of mutually separate grains or particles, even in their swollen state. As before- mentioned, the superabsorbents are also able to retain liquid when subjected to normal pressures in use, but do not retain their shape and are liable to be flat ⁇ tened laterally when subjected to pressure. The super ⁇ absorbents 2 are therefore not able to loosen the fluff, and the fluff mat will therefore remain sub- stantially in a collapsed state. The absorbent pad shown in Figure 2 is therefore not able to quickly absorb further liquid.
  • FIG. 3 illustrates a fluff mat 1 in which there are mixed superabsorbents 3 which have a high degree of cross-linking and therewith a high gel strength.
  • the fluff mat 1 shown in Figure 3 will collapse in the same way as that described with reference, to Figure 1 when the mat absorbs liquid.
  • the superabsorbents 3, however, are so highly cross-linked and of such a high gel strength that they are able to swell under normal use pressure in a diaper or the like, without changing shape.
  • the fluff mat 1 when the superabsorbent particles 3 swell, the fluff mat 1 will be loosened or "fluffed", as illustrated in Figure 4.
  • the fluff mat is emptied of liquid, at the same time as it is loosened by the superabsorbent.
  • the absorbent pad illustrated in Figure 4 will contain a large amount of air which can be readily displaced when further liquid is absorbed.
  • An inventive absorbent pad is constructed from an upper layer of the kind described with reference to Figures 3 and 4, this layer laying nearest the user when the absorbent pad is used in a diaper, and a bottom layer which includes a superabsorbent whose liquid absorbency is greater than the absorbency of the upper layer.
  • the bottom layer of the inventive absorbent pad may, for instance, be constructed in the manner described with reference to Figures 1 and 2.
  • the superabsorbent in the bottom layer may optionally comprise a superabsorbent having a gel strength which is so low as to form a continuous gel.
  • the important criterion in this respect is that the upper layer is able to repeatedly absorb liquid quickly.
  • a gel which exhibits a very high gel strength and which functions effectively in the upper layer of the inventive absorbent pad is Salsorb DPX 5038.
  • an inventive absorbent pad may comprise an integrally configured fluff body which incorporates different layers of different superabsorbents.

Landscapes

  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Photoreceptors In Electrophotography (AREA)
PCT/SE1991/000101 1990-02-14 1991-02-13 An absorbent body incorporating two layers which contain different superabsorbents WO1991011978A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
DE69112430T DE69112430T2 (de) 1990-02-14 1991-02-13 Absorptionsgegenstand mit zwei unterschiedlichen superabsorbanzien enthaltenden lagen.
EP91904290A EP0592401B1 (en) 1990-02-14 1991-02-13 An absorbent body incorporating two layers which contain different superabsorbents
AU72514/91A AU644628B2 (en) 1990-02-14 1991-02-13 An absorbent body incorporating two layers which contain different superabsorbents
CA002075963A CA2075963C (en) 1990-02-14 1991-02-13 An absorbent body incorporating two layers which contain different super-absorbents
FI923616A FI101766B (sv) 1990-02-14 1992-08-12 Absorptionskropp för användning i blöjor, inkontinensskydd eller likna nde
NO923172A NO178603C (no) 1990-02-14 1992-08-13 Absorberende legeme som innbefatter to lag inneholdende ulike superabsorberende stoffer
GR950402416T GR3017292T3 (en) 1990-02-14 1995-09-05 An absorbent body incorporating two layers which contain different superabsorbents.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9000534A SE465553C (sv) 1990-02-14 1990-02-14 Absorbtionskropp, i vilken ingår två skikt innehållande olika superabsorbenter
SE9000534-9 1990-02-14

Publications (1)

Publication Number Publication Date
WO1991011978A1 true WO1991011978A1 (en) 1991-08-22

Family

ID=20378563

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1991/000101 WO1991011978A1 (en) 1990-02-14 1991-02-13 An absorbent body incorporating two layers which contain different superabsorbents

Country Status (17)

Country Link
EP (1) EP0592401B1 (sv)
JP (1) JP3018008B2 (sv)
AT (1) ATE126690T1 (sv)
AU (1) AU644628B2 (sv)
CA (1) CA2075963C (sv)
DE (1) DE69112430T2 (sv)
DK (1) DK0592401T3 (sv)
ES (1) ES2076523T3 (sv)
FI (1) FI101766B (sv)
GR (1) GR3017292T3 (sv)
HU (1) HU212298B (sv)
MX (1) MX173712B (sv)
NO (1) NO178603C (sv)
NZ (1) NZ236961A (sv)
SE (1) SE465553C (sv)
WO (1) WO1991011978A1 (sv)
ZA (1) ZA91784B (sv)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5348547A (en) * 1993-04-05 1994-09-20 The Procter & Gamble Company Absorbent members having improved fluid distribution via low density and basis weight acquisition zones
EP0631768A1 (en) * 1993-06-30 1995-01-04 The Procter & Gamble Company Absorbent core having improved fluid handling properties
EP0640330A1 (en) * 1993-06-30 1995-03-01 The Procter & Gamble Company Hygienic absorbent articles
US5741241A (en) * 1992-04-28 1998-04-21 Sca Molnlycke Ab Absorbent body for an absorbent article
US6278037B1 (en) * 1997-03-27 2001-08-21 The Procter & Gamble Company Absorbent article having improved comfort during use by improved fit even when loaded and improved rewet performance
US6436433B1 (en) * 1997-02-21 2002-08-20 Lts Lohmann Therapie-Systeme Ag Transdermal or topical plaster system with a polyacrylate matrix with improved physical properties
WO2003080136A1 (en) * 2002-03-27 2003-10-02 Sca Hygiene Products Ab Absorbent product
WO2005032443A1 (en) * 2003-10-06 2005-04-14 Sca Hygiene Products Ab Absorbent article comprising an absorbent structure
US7615040B2 (en) 2001-12-19 2009-11-10 Kimberly-Clark Worldwide, Inc. Thin, flexible, low capacity absorbent article with leakage protection

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE463747B (sv) * 1989-05-31 1991-01-21 Moelnlycke Ab Absorberande alster innefattande aatminstone tvaa olika superabsorbenter
US6383960B1 (en) 1997-10-08 2002-05-07 Kimberly-Clark Worldwide, Inc. Layered absorbent structure
US6710225B1 (en) 1998-06-15 2004-03-23 Kimberly-Clark Worldwide, Inc. Layered absorbent structure with a zoned basis weight
US6416697B1 (en) 1999-12-03 2002-07-09 Kimberly-Clark Worldwide, Inc. Method for obtaining a dual strata distribution of superabsorbent in a fibrous matrix
US6437214B1 (en) 2000-01-06 2002-08-20 Kimberly-Clark Worldwide, Inc. Layered absorbent structure with a zoned basis weight and a heterogeneous layer region

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2048078A (en) * 1979-04-28 1980-12-10 Zenmi Co Ltd Sanitary napkin
US4673402A (en) * 1985-05-15 1987-06-16 The Procter & Gamble Company Absorbent articles with dual-layered cores
SE463747B (sv) * 1989-05-31 1991-01-21 Moelnlycke Ab Absorberande alster innefattande aatminstone tvaa olika superabsorbenter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2048078A (en) * 1979-04-28 1980-12-10 Zenmi Co Ltd Sanitary napkin
US4673402A (en) * 1985-05-15 1987-06-16 The Procter & Gamble Company Absorbent articles with dual-layered cores
SE463747B (sv) * 1989-05-31 1991-01-21 Moelnlycke Ab Absorberande alster innefattande aatminstone tvaa olika superabsorbenter

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5741241A (en) * 1992-04-28 1998-04-21 Sca Molnlycke Ab Absorbent body for an absorbent article
US5348547A (en) * 1993-04-05 1994-09-20 The Procter & Gamble Company Absorbent members having improved fluid distribution via low density and basis weight acquisition zones
EP0631768A1 (en) * 1993-06-30 1995-01-04 The Procter & Gamble Company Absorbent core having improved fluid handling properties
EP0640330A1 (en) * 1993-06-30 1995-03-01 The Procter & Gamble Company Hygienic absorbent articles
TR28301A (tr) * 1993-06-30 1996-04-09 Procter & Gamble Elyafli malzeme ve süper emici malzeme iceren emici gövdeler ve bu gövdeleri iceren emici esyalar.
US5762641A (en) * 1993-06-30 1998-06-09 The Procter & Gamble Company Absorbent core having improved fluid handling properties
US6436433B1 (en) * 1997-02-21 2002-08-20 Lts Lohmann Therapie-Systeme Ag Transdermal or topical plaster system with a polyacrylate matrix with improved physical properties
US6278037B1 (en) * 1997-03-27 2001-08-21 The Procter & Gamble Company Absorbent article having improved comfort during use by improved fit even when loaded and improved rewet performance
US7615040B2 (en) 2001-12-19 2009-11-10 Kimberly-Clark Worldwide, Inc. Thin, flexible, low capacity absorbent article with leakage protection
WO2003080136A1 (en) * 2002-03-27 2003-10-02 Sca Hygiene Products Ab Absorbent product
CN1296100C (zh) * 2002-03-27 2007-01-24 Sca卫生产品股份公司 吸收制品
AU2003216023B2 (en) * 2002-03-27 2009-02-05 Sca Hygiene Products Ab Absorbent product
WO2005032443A1 (en) * 2003-10-06 2005-04-14 Sca Hygiene Products Ab Absorbent article comprising an absorbent structure
CN100438842C (zh) * 2003-10-06 2008-12-03 Sca卫生产品股份公司 包括一个吸收结构的吸收制品

Also Published As

Publication number Publication date
HU212298B (en) 1996-05-28
CA2075963C (en) 2002-01-01
EP0592401A1 (en) 1994-04-20
DK0592401T3 (da) 1995-10-16
EP0592401B1 (en) 1995-08-23
NO178603B (no) 1996-01-22
NO178603C (no) 1996-05-02
DE69112430T2 (de) 1996-02-08
SE465553B (sv) 1991-09-30
HU9202647D0 (en) 1992-12-28
SE465553C (sv) 1996-06-24
DE69112430D1 (de) 1995-09-28
FI101766B1 (sv) 1998-08-31
NO923172D0 (no) 1992-08-13
JPH05504083A (ja) 1993-07-01
NO923172L (no) 1992-10-13
ES2076523T3 (es) 1995-11-01
JP3018008B2 (ja) 2000-03-13
HUT66278A (en) 1994-11-28
NZ236961A (en) 1992-12-23
CA2075963A1 (en) 1991-08-15
ATE126690T1 (de) 1995-09-15
FI101766B (sv) 1998-08-31
AU644628B2 (en) 1993-12-16
ZA91784B (en) 1991-11-27
SE9000534D0 (sv) 1990-02-14
MX173712B (es) 1994-03-23
FI923616A (fi) 1992-08-12
FI923616A0 (fi) 1992-08-12
GR3017292T3 (en) 1995-12-31
SE9000534L (sv) 1991-08-15
AU7251491A (en) 1991-09-03

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