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).

  • METHOD OF SURFACE TREATING INORGANIC OXIDE PARTICLES, HARDENABLE DENTAL COMPOSITIONS, SURFACE TREATED PARTICLES, AND SURFACE TREATMENT COMPOUNDS
    Publication number: 20130059941
    Abstract: Presently described are methods of surface treating inorganic oxide particles, hardenable (e.g. dental) compositions comprising a polymerizable resin composition and surface treated particles, as well as surface treated (e.g. nanocluster) inorganic oxide particles, and silane surface treatment compounds. In one embodiment, the method comprises forming a surface treatment compound by reacting a first functional group of a (meth)acrylate monomer having a molecular weight of at least 350 g/mole with a second functional group of a silane compound wherein the first and second functional group react to form a covalent bond; and combining the surface treatment compound with inorganic oxide particles.
    Type: Application
    Filed: May 6, 2011
    Publication date: March 7, 2013
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Bradley D. Craig, Ahmed S. Abuelyaman, Sumita B. Mitra
  • POLYMERIZABLE ISOCYANURATE MONOMERS AND DENTAL COMPOSITIONS
    Publication number: 20130012614
    Abstract: Polymerizable isocyanurate monomers and dental compositions are described. A hardenable dental composition is described comprising at least one isocyanurate monomer that is a stable liquid at about 25° C. The isocyanurate monomer comprises at least one divalent linking group bonded to a nitrogen atom of a trivalent isocyanuric acid ring, wherein the divalent linking group comprises a moiety selected from ester, thioester, ether, or thioether, and combinations of such moieties and a terminal ethylenically unsaturated polymerizable group.
    Type: Application
    Filed: March 8, 2011
    Publication date: January 10, 2013
    Applicant: 3M Innovative Properties Company
    Inventors: Ahmed S. Abuelyaman, Sumita B. Mitra
  • Film forming dental compositions and related methods
    Patent number: 8329674
    Abstract: Film forming dental compositions comprising a compound of formula (I) or a pharmaceutically acceptable salt thereof, and a binder. The film forming dental compositions can include an amino sugar, a derivative of an amino sugar, or a pharmaceutically acceptable salt thereof, and can be useful in inhibiting biofilm formation in an oral cavity.
    Type: Grant
    Filed: July 10, 2008
    Date of Patent: December 11, 2012
    Assignee: 3M Innovative Properties Company
    Inventors: Jie Yang, Bhaskar V. Velamakanni, Sumita B. Mitra, Alphonsus V. Pocius, John J. Stofko, Jr., Jeremy M. Yarwood
  • DENTAL FILLERS, METHODS, COMPOSITIONS INCLUDING A CASEINATE
    Publication number: 20120277343
    Abstract: The present application provides dental fillers, and methods of making and using dental fillers that include a treated surface that includes a caseinate. Dental compositions including such dental fillers can be useful for delivering ions to the oral environment. Dental compositions, and methods of using dental compositions that include a caseinate and a hardenable resin or a water-dispersible, polymeric film former are also provided.
    Type: Application
    Filed: July 11, 2012
    Publication date: November 1, 2012
    Inventors: Richard P. Rusin, Sumita B. Mitra, Kevin M. Cummings, Paul A. Burgio, Afshin Falsafi
  • Dental fillers, methods, compositions including a caseinate
    Patent number: 8278368
    Abstract: The present application provides dental fillers, and methods of making and using dental fillers that include a treated surface that includes a caseinate. Dental compositions including such dental fillers can be useful for delivering ions to the oral environment. Dental compositions, and methods of using dental compositions that include a caseinate and a hardenable resin or a water-dispersible, polymeric film former are also provided.
    Type: Grant
    Filed: November 7, 2005
    Date of Patent: October 2, 2012
    Assignee: 3M Innnovatve Properties Company
    Inventors: Richard P. Rusin, Sumita B. Mitra, Kevin M. Cummings, Paul A. Burgio, Afshin Falsafi
  • DENTAL ADHESIVE COMPOSITION COMPRISING ADHESION PROMOTING POLYMER ADDITIVE AND METHOD
    Publication number: 20120052466
    Abstract: Presently described are dental adhesive compositions and methods of use. The dental adhesive compositions described herein comprises a major amount of a hardenable component comprising a polymerizable organic component (i.e. having ethylenically unsaturated moieties) and a minor amount of a (e.g. water dispersible) polymer that comprises repeating units comprising polar or polarizable groups and repeating units comprising hydrophobic hydrocarbon groups.
    Type: Application
    Filed: May 6, 2010
    Publication date: March 1, 2012
    Inventors: Brian A. Shukla, Sumita B. Mitra, Mahfuza B. Ali
  • Dental compositions containing carbosilane polymers
    Patent number: 8084515
    Abstract: Carbosilane-containing polymers (including oligomers) having the following structural features: greater than one repeat unit; at least four Si-arylene bonds; at least one (meth)acrylate moiety, Si—H moiety, or both; no Si—O bonds; preferably at least four silicon atoms; wherein two silicon atoms are separated by one arylene group in each repeat unit.
    Type: Grant
    Filed: July 13, 2005
    Date of Patent: December 27, 2011
    Assignee: 3M Innovative Properties Company
    Inventors: Kevin M. Lewandowski, Ahmed S. Abuelyaman, Todd D. Jones, Babu N. Gaddam, Sumita B. Mitra, Naimul Karim, Adrian S. Eckert, Peter Bissinger
  • Adhesive composition for hard tissue
    Patent number: 8076389
    Abstract: An adhesive composition including an etchant for a hard tissue surface, at least one multifunctional crosslinkable (meth)acrylate monomer with a functionality greater than 4, and water. The adhesive composition is a water-in-oil emulsion.
    Type: Grant
    Filed: December 17, 2007
    Date of Patent: December 13, 2011
    Assignee: 3M Innovative Properties Company
    Inventors: Prabhakara S. Rao, Steven M. Aasen, Ahmed S. Abuelyaman, Sumita B. Mitra, Bradley D. Craig, Brian A. Shukla, David J. Plaut, Victoria A. Russell
  • Self-etching dental compositions and methods
    Patent number: 8029286
    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: September 19, 2008
    Date of Patent: October 4, 2011
    Assignee: 3M Innovative Properties Company
    Inventors: Bradley D. Craig, Steven M. Aasen, Ahmed S. Abuelyaman, David K. Cinader, Afshin Falsafi, Reinhold Hecht, Thomas Luchterhandt, Sumita B. Mitra, Prabhakara S. Rao, Brian A. Shukla, Markus Watermann
  • SURFACE-TREATED CALCIUM PHOSPHATE PARTICLES SUITABLE FOR ORAL CARE AND DENTAL COMPOSITIONS
    Publication number: 20110229421
    Abstract: Calcium phosphate particles are described comprising a surface treatment wherein the surface treatment comprises at least one sugar alcohol, at least one glycerophosphoric acid compound, or mixture thereof. Also described are various oral care compositions comprising surface treated calcium phosphate particles and methods of surface treating calcium phosphate particles.
    Type: Application
    Filed: November 11, 2009
    Publication date: September 22, 2011
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Richard P. Rusin, Neeraj Sharma, Sumita B. Mitra
  • PREFORMED MALLEABLE DENTAL ARTICLES AND METHODS
    Publication number: 20110207087
    Abstract: Protected hardenable dental article comprising a hardenable dental article comprising a base and at least one outer surface extending from the base, wherein at least the base and the at least one outer surface of the hardenable dental article comprise a hardenable dental material; and a multi-layer polymeric film in contact with at least a portion of the at least one outer surface; wherein the multi-layer polymeric film comprises at least two dissimilar polymers in separate layers; kits including the protected hardenable dental article; and methods of making hardenable dental articles are disclosed.
    Type: Application
    Filed: November 17, 2009
    Publication date: August 25, 2011
    Inventors: Todd D. Jones, Sumita B. Mitra, Gerald S. Deeb, YuFeng Liu, Jie Yang, Naimul Karim, Dwight W. Jacobs
  • Dental compositions containing hybrid monomers
    Patent number: 7888400
    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: Grant
    Filed: May 9, 2006
    Date of Patent: February 15, 2011
    Assignee: 3M Innovative Properties Company
    Inventors: Ahmed S. Abuelyaman, Sumita B. Mitra, Kevin M. Lewandowski, David J. Plaut
  • HARDENABLE SELF-SUPPORTING STRUCTURES AND METHODS
    Publication number: 20110003266
    Abstract: Compositions, particularly for forming dental products, having a hardenable self-supporting structure with sufficient malleability to be subsequently customized into a second shape and then hardened, and methods.
    Type: Application
    Filed: September 8, 2010
    Publication date: January 6, 2011
    Inventors: Naimul Karim, Todd D. Jones, Kevin M. Lewandowski, Duane D. Fansler, James M. Nelson, Marcelino Salviejo-Rivas, Babu N. Gaddam, Ahmed S. Abuelyaman, Sumita B. Mitra
  • COMPOUND SMC DENTAL MILL BLANKS
    Publication number: 20100285429
    Abstract: A dental mill blank is formed from a number of different self-supporting, malleable, curable (SMC) materials distributed within the blank so that a dental article machined from the blank closely resembles natural dentition in appearance or function. When in an uncured state, a single mill blank can be adapted to fit a variety of different tooth sizes and shapes, thus reducing the inventory of mill blank types required for fabrication of the range of possible tooth shapes and sizes.
    Type: Application
    Filed: November 18, 2008
    Publication date: November 11, 2010
    Inventors: Naimul Karim, Sumita B. Mitra
  • DIGITALLY-MACHINED SMC DENTAL ARTICLES
    Publication number: 20100268363
    Abstract: A dental article is fabricated from an SMC material using three-dimensional data captured from natural dentition to guide a computer-controlled milling machine. The three-dimensional data may include scans of an original tooth structure and a prepared tooth surface to characterize all surfaces of a dental article, or certain features may be created within a computer-assisted design environment taking account of occlusion, proximal contacts, and the like. In addition the model applied to a computer-controlled milling machine may account for shrinkage of the SMC material during any post-milling curing steps in order to ensure an accurate fit to the prepared tooth surface.
    Type: Application
    Filed: November 20, 2008
    Publication date: October 21, 2010
    Inventors: Naimul Karim, Sumita B. Mitra
  • Hardenable self-supporting structures and methods
    Patent number: 7816423
    Abstract: Compositions, particularly for forming dental products, having a hardenable self-supporting structure with sufficient malleability to be subsequently customized into a second shape and then hardened, and methods.
    Type: Grant
    Filed: October 13, 2008
    Date of Patent: October 19, 2010
    Assignee: 3M Innovative Properties Company
    Inventors: Naimul Karim, Todd D. Jones, Kevin M. Lewandowski, Duane D. Fansler, James M. Nelson, Marcelino Salviejo-Rivas, Babu N. Gaddam, Ahmed S. Abuelyaman, Sumita B. Mitra
  • DIGITALLY-PAINTED DENTAL ARTICLES
    Publication number: 20100260924
    Abstract: A digital painting process provides computer-controlled finishing of dental articles. The process can selectively apply different materials over portions of a dental article in one or more layers to achieve a multi-chromatic finish having a variety of colors, finishes, and surface properties that closely match the appearance and function of human dentition.
    Type: Application
    Filed: November 20, 2008
    Publication date: October 14, 2010
    Inventors: Naimul Karim, Sumita B. Mitra
  • REMINERALIZING COMPOSITIONS AND METHODS
    Publication number: 20100260849
    Abstract: The present application provides compositions comprising a divalent metal cation source or divalent metal cations dissolved in a substantially anhydrous liquid, and methods of making and using the compositions. Such compositions can be useful for remineralizing dental structures and/or providing other useful effects including an anticaries effect.
    Type: Application
    Filed: December 11, 2008
    Publication date: October 14, 2010
    Inventors: Richard P. Rusin, Kevin M. Cummings, Sumita B. Mitra
  • SMC CROWN SHELLS
    Publication number: 20100244294
    Abstract: A dental article such as a crown is fabricating by layering one or more preformed shells of SMC material onto an understructure. The understructure may be fabricated from any suitably strong material for use in replacing dentition. At the same time, a number of SMC shells may be used to provide a finished dental article having a natural-looking, multi-chromatic appearance. The SMC material(s) may be cured to provide an exterior hardness suitable for use in dental applications.
    Type: Application
    Filed: November 24, 2008
    Publication date: September 30, 2010
    Inventors: Naimul Karim, Sumita B. Mitra, Marcelino Salviejo-Rivas
  • FABRICATION OF DENTAL ARTICLES USING DIGITALLY-CONTROLLED REDUCTIVE AND DIGITALLY-CONTROLLED ADDITIVE PROCESSES
    Publication number: 20100233655
    Abstract: By capturing a highly detailed three-dimensional digital model of dentition, a suitable replacement dental article be fabricated with a combination of digitally-controlled reductive processes such as milling and digitally-controlled additive processes such as digital painting. A dental article so-manufactured can provide an aesthetically pleasing, multi-chromatic appearance that closely matches surrounding dentition.
    Type: Application
    Filed: November 18, 2008
    Publication date: September 16, 2010
    Inventors: Naimul Karim, Sumita B. Mitra