Patents by Inventor Sumita B. Mitra

Sumita B. Mitra 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).

  • Foamable Dental Compositions and Methods
    Publication number: 20080299520
    Abstract: A foamable dental composition that includes a film-forming component, wherein the film-forming component forms a retentive polymeric coating on a dental surface.
    Type: Application
    Filed: December 22, 2006
    Publication date: December 4, 2008
    Inventors: Mahfuza B. Ali, Paul A. Burgio, Sumita B. Mitra
  • Self-etching emulsion dental compositions and methods
    Patent number: 7452924
    Abstract: The present invention is directed to dental compositions that can be used as adhesives for bonding a dental material to a dental structure surface and/or as a dental restorative material. The dental composition is preferably applied to a dental structure surface under conditions effective to etch the dental structure surface.
    Type: Grant
    Filed: August 11, 2004
    Date of Patent: November 18, 2008
    Assignees: 3M Espe AG, 3M Innovative Properties Company
    Inventors: Steven M. Aasen, Ahmed S. Abuelyaman, Hendrik M. Grupp, Miriam Hansen, Thomas Klettke, Guenther Lechner, Kevin M. Lewandowski, Thomas Luchterhandt, Sumita B. Mitra, Prabhakara S. Rao, Victoria A. Russell, Michael S. Wendland
  • DENTAL PASTES, DENTAL ARTICLES, AND METHODS
    Publication number: 20080242759
    Abstract: The present invention provides a dental paste, a dental article, methods of making and using the dental paste, and compositions prepared therefrom. In one embodiment, the dental paste includes (a) a filler including porous, non-pyrogenic silica having a silane treated surface and being substantially free of heavy metals and (b) a filler including non-aggregated primary silica particles, with the fillers being dispersed in a hardenable resin.
    Type: Application
    Filed: June 11, 2008
    Publication date: October 2, 2008
    Inventors: Dong Wu, Brant U. Kolb, Sumita B. Mitra, Bradley D. Craig, Brian N. Holmes, Richard P. Rusin, Mark S. Windisch
  • Dental Compositions Containing Hybrid Monomers
    Publication number: 20080194722
    Abstract: The invention features dental compositions comprising at least one hybrid monomer that comprises a cyclic allylic sulfide moiety attached to a (meth)acryloyl moiety. These two functional moieties are typically joined either directly to each via a chemical bond or through some chemical structure or spacer molecule. The composition may optionally contain additional polymerizable compounds, such as ethylenically unsaturated compounds, that are typically used in dental compositions.
    Type: Application
    Filed: May 9, 2006
    Publication date: August 14, 2008
    Inventors: Ahmed S. Abuelyaman, Sumita B. Mitra, Kevin M. Lewandowski, David J. Plaut
  • Dental pastes, dental articles, and methods
    Patent number: 7393882
    Abstract: The present invention provides a dental paste, a dental article, methods of making and using the dental paste, and compositions prepared therefrom. In one embodiment, the dental paste includes (a) a filler including porous, non-pyrogenic silica having a silane treated surface and being substantially free of heavy metals and (b) a filler including non-aggregated primary silica particles, with the fillers being dispersed in a hardenable resin.
    Type: Grant
    Filed: January 29, 2003
    Date of Patent: July 1, 2008
    Assignee: 3M Innovative Properties Company
    Inventors: Dong Wu, Brant U. Kolb, Sumita B. Mitra, Bradley D. Craig, Brian N. Holmes, Richard P. Rusin, Mark S. Windisch
  • Methods for the treatment of periodontal disease
    Patent number: 7226928
    Abstract: The disclosure provides methods for the treatment and prevention of periodontal disease. In preferred embodiments, the invention provides for local treatment of periodontal tissues with a pharmaceutical composition including an immune response modifier (IRM) selected from the group of immune response modifiers comprising imidazoquinoline amines, imidazopyridine amines, 6,7-fused cycloalkylimidazopyridine amines, imidazonaphtyridine amines, oxazoloquinoline amines, thiazoloquinoline amines and 1,2-bridged imidazopyridine amines.
    Type: Grant
    Filed: June 14, 2002
    Date of Patent: June 5, 2007
    Assignee: 3M Innovative Properties Company
    Inventors: Sumita B. Mitra, Charles E. Shelburne, Mark A. Tomai
  • Amide-functional polymers, compositions, and methods
    Patent number: 7223826
    Abstract: Amide-functional polymers, and compositions including such polymers, are disclosed. The compositions, which optionally may be hardenable, are useful for treating a surface.
    Type: Grant
    Filed: July 24, 2003
    Date of Patent: May 29, 2007
    Assignee: 3M Innovative Properties Company
    Inventors: Mahfuza B. Ali, Sumita B. Mitra, Joel D. Oxman
  • Composition containing a polymerizable reducing agent, kit, and method
    Patent number: 7173074
    Abstract: The present invention provides a hardenable (i.e., curable by polymerization, crosslinking, ionic, or other chemical reaction) composition that includes polymerizable urea or thiourea compounds that function as reductants (i.e., reducing agents) in redox polymerization reactions.
    Type: Grant
    Filed: April 12, 2002
    Date of Patent: February 6, 2007
    Assignee: 3M Innovative Properties Company
    Inventors: Sumita B. Mitra, Afshin Falsafi
  • Acid-reactive dental fillers, compositions, and methods
    Patent number: 7090722
    Abstract: Acid-reactive dental fillers, and methods of making and using such fillers, are disclosed. The acid-reactive dental fillers include a trivalent metal, oxygen, fluorine, an alkaline earth metal, and, optionally, silicon. The acid-reactive dental fillers are preferably nanostructured, for example, in the form of nanoparticles.
    Type: Grant
    Filed: May 17, 2004
    Date of Patent: August 15, 2006
    Assignee: 3M Innovative Properties Company
    Inventors: Kenton D. Budd, Jason P. Thalacker, Sumita B. Mitra, Brant U. Kolb, Lani S. Kangas
  • Dental fillers, pastes, and compositions prepared therefrom
    Patent number: 7091259
    Abstract: The present invention provides a dental paste, methods of making and using the dental paste, and compositions prepared therefrom. The dental paste includes (a) a filler including porous, non-pyrogenic silica having a silane treated surface and being substantially free of heavy metals and (b) a filler including non-agregated primary silica particles, with the fillers being dispersed in a hardenable resin. Fillers including porous, non-pyrogenic silica, and methods of making and using the fillers, are also provided.
    Type: Grant
    Filed: July 3, 2002
    Date of Patent: August 15, 2006
    Assignee: 3M Innovative Properties Company
    Inventors: Hoa T. Bui, Brant U. Kolb, Sumita B. Mitra
  • Dental articles including post-formable multilayer optical films
    Patent number: 7077649
    Abstract: Dental articles including at least one optical surface formed of a multilayer optical film including layers of at least one strain-induced birefringent material are disclosed. The multilayer optical films included in the dental articles is preferably post-formed into desired non-planar shapes in manners that result in some deformation of the optical stack of the multilayer optical films. A variety of dental implements can be constructed with multilayer optical film including dental mirrors, light guides for use in connection with photo-curing dental materials, and matrix bands for use in molding photo-curing dental restoratives.
    Type: Grant
    Filed: June 15, 2004
    Date of Patent: July 18, 2006
    Assignee: 3M Innovative Properties Company
    Inventors: Kathryn R. Bretscher, Sumita B. Mitra, Olester Benson, Jr., James M. Jonza, William W. Merrill, Andrew J. Ouderkirk, Michael F. Weber, Janis R. Gust
  • Medical compositions containing an ionic salt, kits, and methods
    Patent number: 6982288
    Abstract: A hardenable medical composition (preferably, dental composition) that includes an ionic redox polymerization system and at least one secondary ionic salt that includes a cation selected from the group consisting of a Group I ion, a Group II ion, an ammonium ion of the formula NR4+ wherein each R is H or a (C1–C4)alkyl group, and mixtures thereof.
    Type: Grant
    Filed: April 12, 2002
    Date of Patent: January 3, 2006
    Assignee: 3M Innovative Properties Company
    Inventors: Sumita B. Mitra, Afshin Falsafi
  • Orthodontic adhesives and appliances including an adhesive on the base of the appliance
    Patent number: 6960079
    Abstract: Orthodontic adhesives and packaged articles including an orthodontic appliance having a base for bonding the appliance to a tooth are disclosed. In the packaged articles, an adhesive is on the base of the appliance, and a container at least partially surrounds the orthodontic appliance having adhesive on the base thereof.
    Type: Grant
    Filed: April 18, 2002
    Date of Patent: November 1, 2005
    Assignee: 3M Innovative Properties Company
    Inventors: Joan V. Brennan, Sumita B. Mitra, Mark S. Schaberg, Robert D. Kuehn, Joel D. Oxman, Darrell S. James, Sharon M. Rozzi, David K. Cinader
  • Immune response modifiers for the treatment of periodontal disease
    Publication number: 20040235881
    Abstract: The disclosure provides methods for the treatment and prevention of periodontal disease. In preferred embodiments, the invention provides for local treatment of periodontal tissues with a pharmaceutical composition including an immune response modifier (IRM) selected from the group of immune response modifiers comprising imidazoquinoline amines, imidazopyridine amines, 6,7-fused cycloalkylimidazopyridine amines, imidazonaphtyridine amines, oxazoloquinoline amines, thiazoloquinoline amines and 1,2-bridged imidazopyridine amines.
    Type: Application
    Filed: November 24, 2003
    Publication date: November 25, 2004
    Inventors: Sumita B. Mitra, Charles E. Shelburne, Mark A. Tomai
  • Dental articles including post-formable multilayer optical films
    Publication number: 20040229187
    Abstract: Dental articles including at least one optical surface formed of a multilayer optical film including layers of at least one strain-induced birefringent material are disclosed. The multilayer optical films included in the dental articles is preferably post-formed into desired non-planar shapes in manners that result in some deformation of the optical stack of the multilayer optical films. A variety of dental implements can be constructed with multilayer optical film including dental mirrors, light guides for use in connection with photo-curing dental materials, and matrix bands for use in molding photo-curing dental restoratives.
    Type: Application
    Filed: June 15, 2004
    Publication date: November 18, 2004
    Applicant: 3M Innovative Properties Company
    Inventors: Kathryn R. Bretscher, Sumita B. Mitra, Olester Benson, James M. Jonza, William W. Merrill, Andrew J. Ouderkirk, Michael F. Weber, Janis R. Gust
  • Dental whitening compositions and methods
    Publication number: 20040185013
    Abstract: Dental whitening compositions including a polymer and a tooth whitening agent are provided. The dental whitening compositions, which optionally may be hardenable, are useful for coating oral surfaces.
    Type: Application
    Filed: July 24, 2003
    Publication date: September 23, 2004
    Inventors: Paul A. Burgio, Mahfuza B. Ali, Sumita B. Mitra
  • Amide-functional polymers, compositions, and methods
    Publication number: 20040162375
    Abstract: Amide-functional polymers, and compositions including such polymers, are disclosed. The compositions, which optionally may be hardenable, are useful for treating a surface.
    Type: Application
    Filed: July 24, 2003
    Publication date: August 19, 2004
    Inventors: Mahfuza B. Ali, Sumita B. Mitra, Joel D. Oxman
  • Hardenable thermally responsive compositions
    Publication number: 20040151691
    Abstract: Thermally responsive compositions that include a thermally responsive viscosity modifier, a polymerizable component, and water are provided. The compositions, which optionally may be hardened, are useful for application to a surface of a body.
    Type: Application
    Filed: July 24, 2003
    Publication date: August 5, 2004
    Inventors: Joel D. Oxman, Mai T. Nguyen, Sumita B. Mitra, Hoa T. Bui, Jingwen Ma, Jie J. Liu, Mahfuza B. Ali
  • Glass ionomer cement
    Patent number: 6765038
    Abstract: Resin-modified glass ionomer cements contain a polymer having a plurality of acidic repeating units but being substantially free of polymerizable vinyl groups, a polymer having a plurality of acidic repeating units and a plurality of polymerizable vinyl groups, a fluoroaluminosilicate glass, a redox cure system that can initiate dark cure of the vinyl groups, and water. The cements can be used without requiring a preliminary tooth priming or conditioning step and without requiring a curing lamp. The cements offer ease of mixing, convenient viscosity, convenient cure, good flexural strength, good adhesion to dentin and enamel, and high fluoride release, even when cured in thick sections and in the dark.
    Type: Grant
    Filed: July 27, 2001
    Date of Patent: July 20, 2004
    Assignee: 3M Innovative Properties Company
    Inventor: Sumita B. Mitra
  • Dental compositions including enzymes and methods
    Publication number: 20040120901
    Abstract: A hardenable dental composition that includes a polymerizable component and a therapeutic enzyme mixed within the polymerizable component, wherein upon hardening the polymerizable component to form a hardened dental material having a therapeutic enzyme mixed therein, the hardened dental material with the enzyme mixed therein is in contact with saliva in a subject's mouth for at least 1 day.
    Type: Application
    Filed: December 20, 2002
    Publication date: June 24, 2004
    Inventors: Dong Wu, Joel D. Oxman, Sumita B. Mitra, Ingo Reinhold Haberlein