Patents by Inventor Katharina J. Bischof

Katharina J. Bischof 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: 6121508
    Abstract: A hydrophilic, pressure-sensitive adhesive composition prepared by irradiating solid poly(N-vinyl lactam) with ionizing radiation to crosslink the poly(N-vinyl lactam) and thereafter mixing the radiation-crosslinked poly(N-vinyl lactam) with essentially unirradiated plasticizer in an amount sufficient to form a cohesive, pressure-sensitive adhesive composition. The composition is useful as a biomedical adhesive for transmitting or receiving electrical signals as a component (14) of a biomedical electrode (10).
    Type: Grant
    Filed: June 23, 1998
    Date of Patent: September 19, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Katharina J. Bischof, Wilhelm Kuester, Steven S. Kantner
  • Patent number: 5629093
    Abstract: The invention provides a transparent multilayer film comprising a cover layer, a destructible or irreversibly deformable layer, respectively, a pattern of adhesion-regulating material between the cover layer and the damagable layer, and an adhesive layer for bonding with a substrate. The damagable layer has a thickness of at least 10 .mu.m. The following relationship applies to the cohesive strength as well as the adhesion between the layers:a and d>c>bwherebya is the adhesive strength between cover layer (1) and layer (3) in the areas where no adhesion-regulating material (2) is present,b is the adhesive strength between cover layer (1) and layer (3), in the areas where adhesion-regulating material (2) is present,c is the cohesive strength of layer (3), andd is the adhesive strength between layer (3) and adhesive layer (5).The invention also provides for the use of the transparent multilayer film for protection of data on documents, as well as its use as a tamper-proof label.
    Type: Grant
    Filed: July 6, 1995
    Date of Patent: May 13, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Katharina J. Bischof, Luigi Pastore, Wilhelm Kuester, Lynn E. Faykish
  • Patent number: 5270111
    Abstract: A method of using a pressure sensitive adhesive to form a moisture resistant, water-dispersible tape is provided. The adhesive and tape are resistant to autoclavation conditions and/or moisture and body fluids during usage, and are water-dispersible when immersed in aqueous solutions. The tape may be used with cloth body coverings, such as garments such as hospital gowns, drapes, dressings, diapers and other body coverings which require cloth to cloth or cloth to skin adhesion in the presence of moisture and bodily fluids yet be dispersible from such body coverings during laundering or other aqueous alkali immersion.
    Type: Grant
    Filed: October 27, 1992
    Date of Patent: December 14, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Francois C. D'Haese, Katharina J. Bischof, Peter Brink, Yvan A. Bogaert
  • Patent number: 5141989
    Abstract: Screen-printable acrylate pressure-sensitive adhesive composition suitable for adhesive products having simultaneously, and independently from temperature, high values of adhesion, peel strength and shear strength as well as a high water and humidity resistance, comprising(A) about 25 to 225 parts by weight of at least one dissolved inherently tacky pressure-sensitive adhesive selected from non-crosslinked (meth)acrylic ester/(meth)acrylic acid copolymers having an average molecular weight corresponding to an inherent viscosity of not more than 1.0 dl/g; and(B) 100 parts by weight of an organic solvent or solvent mixture having a low partial vapor pressure of less than about 3 kPa (30 mbar) at 20.degree. C. and a dipole amount of at least 1.0 Debye. The acrylate copolymer preferably has structural units of the formula ##STR1## wherein R.sup.1 and R.sup.2 independently are hydrogen or lower alkyl having 1 to 4 carbon atoms; R.sup.
    Type: Grant
    Filed: December 7, 1990
    Date of Patent: August 25, 1992
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Dieter Jung, Katharina J. Bischof nee Mitrowsky, Kai Grimmel, Robert R. L. Smolders
  • Patent number: 5125995
    Abstract: A method of using a pressure sensitive adhesive to form a moisture resistant, water-dispersible tape is provided. The adhesive and tape are resistant to autoclavation conditions and/or moisture and body fluids during usage, and are water-dispersible when immersed in aqueous solutions. The tape may be used with cloth body coverings, such as garments such as hospital gowns, drapes, dressings, diapers and other body coverings which require cloth to cloth or cloth to skin adhesion in the presence of moisture and bodily fluids yet be dispersible from such body coverings during laundering or other aqueous alkali immersion.
    Type: Grant
    Filed: September 10, 1990
    Date of Patent: June 30, 1992
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Francois C. D'Haese, Katharina J. Bischof, Peter Brink, Yvan A. Bogaert