Patents by Inventor Babu N. Gaddam

Babu N. Gaddam 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).

  • Acrylic Pressure-Sensitive Adhesives with Aziridinyl-Epoxy Crosslinking System
    Publication number: 20110124797
    Abstract: A pre-adhesive composition is described comprising an acid-functional (meth)acrylate copolymer and a crosslinking system comprising an aziridine crosslinking agent and epoxy-functional (meth)acryloyl monomer, which when crosslinked, provides a pressure-sensitive adhesive and pressure-sensitive adhesive articles.
    Type: Application
    Filed: November 4, 2010
    Publication date: May 26, 2011
    Inventors: Maureen A. Kavanagh, Larry R. Krepski, Kelly S. Anderson, Peiwang Zhu, Belma Erdogan-Haug, Babu N. Gaddam
  • TWO-PART EPOXY-BASED STRUCTURAL ADHESIVES
    Publication number: 20110120646
    Abstract: A two-part structural adhesive composition comprising a curable epoxy resin, an amine curing agent, a toughening agent, and a reactive liquid modifier. The structural adhesive may also include secondary curatives, initiators, reactive diluents and combinations thereof. The structural adhesives may be used to replace or augment conventional joining means such as welds or mechanical fasteners in bonding parts together.
    Type: Application
    Filed: July 22, 2009
    Publication date: May 26, 2011
    Inventors: Ilya Gorodisher, Alphonsus V. Pocius, Babu N. Gaddam
  • SOLID SUPPORT WITH A GRAFTED CHAIN
    Publication number: 20110100916
    Abstract: Articles that contain a solid support with a grafted chain extending from the solid support, methods of making these articles, and various uses of the articles are described. More specifically, the grafted chain has a functional group that can react with or interact with target compound. Alternatively, the functional group on the grafted chain can react with a modifying agent to provide another group that can react with or interact with the target compound. The grafted chains are attached to the solid support through a ring-opened azlactone group. The articles can be used to purify the target compound or to separate the target compound from other molecules in a sample.
    Type: Application
    Filed: May 11, 2009
    Publication date: May 5, 2011
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Simon K. Shannon, Catherine A. Bothof, Babu N. Gaddam, Jerald K. Rasmussen, Richard B. Ross
  • Azlactone telechelic polymer
    Patent number: 7932325
    Abstract: A curable composition is described comprising a Michael donor component, a polyacryl component, and 1) an ethylenically unsaturated monomer having a reactive azlactone functional group, or 2) an ethylenically unsaturated monomer having a reactive ring-opened azlactone functional group. A telechelic polymer that is the reaction product of these components is also described.
    Type: Grant
    Filed: December 2, 2009
    Date of Patent: April 26, 2011
    Assignee: 3M Innovative Properties Company
    Inventors: Kevin M. Lewandowski, Duane D. Fansler, Babu N. Gaddam
  • ACRYLIC PRESSURE-SENSITIVE ADHESIVES WITH ACYLAZIRIDINE CROSSLINKING AGENTS
    Publication number: 20110054115
    Abstract: A pre-adhesive composition is described comprising an acid-functional (meth)acrylate copolymer and an acylaziridine crosslinking agent, which when crosslinked provides a pressure-sensitive adhesive and pressure-sensitive adhesive articles.
    Type: Application
    Filed: August 25, 2009
    Publication date: March 3, 2011
    Inventors: Belma Erdogan, Timothy D. Filiatrault, Maureen A. Kavanagh, Larry R. Krepski, Babu N. Gaddam
  • DENTAL FILLING COMPOSITION COMPRISING HYPERBRANCHED COMPOUND
    Publication number: 20110045444
    Abstract: Compositions comprising a hyperbranched compound and a polymer prepared from reactants comprising at least one (meth)acrylate monomer, and dental filling compositions comprising a hyperbranched compound.
    Type: Application
    Filed: April 16, 2009
    Publication date: February 24, 2011
    Inventors: Prabhakara S. Rao, Steven M. Aasen, Belma Erdogan-Haug, Babu N. Gaddam, Russel A. Roiko, Eugene G. Joseph
  • 2-octyl (meth)acrylate adhesive composition
    Patent number: 7893179
    Abstract: A pressure sensitive adhesive composition comprising a 2-octyl (meth)acrylate/(meth)acrylic acid copolymer is described. The adhesive composition may be derived from renewable resources and provides good peel, shear and high temperature stability.
    Type: Grant
    Filed: April 14, 2008
    Date of Patent: February 22, 2011
    Assignee: 3M Innovative Properties Company
    Inventors: Kelly S. Anderson, Kevin M. Lewandowski, Duane D. Fansler, Babu N. Gaddam, Eugene G. Joseph
  • ANTIMICROBIAL NANOPARTICLES
    Publication number: 20110028591
    Abstract: A polymerizable composition, comprising a first component comprising a cationic nanoparticle comprising a covalently bonded ammonium group, and a second component comprising an anionic polyether compound is described. Either the first component further comprises an ethylenically unsaturated polymerizable group, the second component further comprises an ethylenically unsaturated polymerizable anion, or both. A method of making an article comprising applying the polymerizable composition to a surface of an article is also described.
    Type: Application
    Filed: March 30, 2009
    Publication date: February 3, 2011
    Inventors: Kelly S. Anderson, Babu N. Gaddam, Alphonsus V. Pocius, Jeremy M. Yarwood
  • ONE-PART EPOXY-BASED STRUCTURAL ADHESIVE
    Publication number: 20110024039
    Abstract: A one-part epoxy structural adhesive comprising an epoxy resin, a toughening agent, a reactive liquid modifier present in an amount ranging from about 5% to about 15% by weight structural adhesive, and a latent amine curing agent. The structural adhesive may optionally include reactive diluents, synthetic mineral fibers, fillers, pigments and combinations th The structural adhesive may be used to form bonded joints between metal parts having clean surfaces, as well as those having surfaces contaminated with hydrocarbon-containing materials, such as oils, processing aids and lubricating agents.
    Type: Application
    Filed: April 10, 2009
    Publication date: February 3, 2011
    Inventors: Christopher J. Campbell, Alphonsus V. Pocius, Ilya Gorodisher, Babu N. Gaddam, Wayne S. Mahoney
  • 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
  • Aziridine-functional photoactive crosslinking compounds
    Patent number: 7838110
    Abstract: A photoactive compound that is the Michael addition reaction product of an aziridine compound and a photoinitiator-functional (meth)acrylate is described. The compound can be used to crosslink (meth)acrylic polymers via a hydrogen abstracting or an alpha-cleavage mechanism.
    Type: Grant
    Filed: December 2, 2008
    Date of Patent: November 23, 2010
    Assignee: 3M Innovative Properties Company
    Inventors: Peiwang Zhu, Maureen A. Kavanagh, Kelly S. Anderson, Larry R. Krepski, Guy D. Joly, Belma Erdogan, Babu N. Gaddam
  • 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
  • AZIRIDINE CROSSLINKING AGENTS FOR ACRYLIC ADHESIVES
    Publication number: 20100227969
    Abstract: A crosslinkable, pre-adhesive composition is described comprising an acid-functional (meth)acrylate copolymer and an aziridine crosslinking agent, which when crosslinked provides a pressure-sensitive adhesive and pressure-sensitive adhesive articles.
    Type: Application
    Filed: February 22, 2010
    Publication date: September 9, 2010
    Inventors: Peiwang Zhu, Zhong Chen, Babu N. Gaddam, Larry R. Krepski, Jingjing Ma, David B. Olson, Andrew Satrijo, Dong-Wei Zhu
  • Methods for reducing bond strengths, dental compositions, and the use thereof
    Patent number: 7776940
    Abstract: Hardenable and hardened dental compositions, and articles including such hardenable and hardened compositions, are provided. In some embodiments, the hardenable dental compositions include an acid-generating component and an acid-reactive component including one or more acid-reactive groups. Upon irradiating, and optionally heating, the hardened compositions are useful, for example, for reducing the bond strength of orthodontic appliances adhered to tooth structures with the hardened compositions.
    Type: Grant
    Filed: December 20, 2005
    Date of Patent: August 17, 2010
    Assignee: 3M Innovative Properties Company
    Inventors: Rajdeep S. Kalgutkar, Joan V. Brennan, Babu N. Gaddam
  • Curable compositions for optical articles
    Patent number: 7767728
    Abstract: A curable composition is provided comprising an oligomer having a plurality of pendent and/or terminal ethylenically unsaturated, free-radically polymerizable functional groups, a free-radically polymerizable crosslinking agent, and/or a diluent monomer, and a photoinitiator. The composition, when cured, is non-yellowing, exhibits low shrinkage and low birefringence making it suitable for many optical applications such as optical lenses, optical fibers, prisms, light guides, optical adhesives, and optical films.
    Type: Grant
    Filed: January 29, 2007
    Date of Patent: August 3, 2010
    Assignee: 3M Innovative Properties Company
    Inventors: Ying-Yuh Lu, Jianhui Xia, Peter M. Olofson, Ming Cheng, Mark F. Ellis, Babu N. Gaddam, Kevin M. Lewandowski, Joseph D. Rule
  • AZIRIDINE-FUNCTIONAL PHOTOACTIVE CROSSLINKING COMPOUNDS
    Publication number: 20100137469
    Abstract: A photoactive compound that is the Michael addition reaction product of an aziridine compound and a photoinitiator-functional (meth)acrylate is described. The compound can be used to crosslink (meth)acrylic polymers via a hydrogen abstracting or an alpha-cleavage mechanism.
    Type: Application
    Filed: December 2, 2008
    Publication date: June 3, 2010
    Inventors: Peiwang Zhu, Maureen A. Kavanagh, Kelly S. Anderson, Larry R. Krepski, Guy D. Joly, Belma Erdogan, Babu N. Gaddam
  • Acrylic pressure-sensitive adhesives with aziridine crosslinking agents
    Patent number: 7714076
    Abstract: A pre-adhesive composition is described comprising an acid-functional (meth)acrylate copolymer and an aziridine crosslinking agent, which when crosslinked provides a pressure-sensitive adhesive and pressure-sensitive adhesive articles.
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: May 11, 2010
    Assignee: 3M Innovative Properties Company
    Inventors: Larry R. Krepski, Timothy D. Filiatrault, Shaun D. McCracken, Maureen A. Kavanagh, Babu N. Gaddam
  • ACRYLIC PRESSURE-SENSITIVE ADHESIVES WITH AZIRIDINE CROSSLINKING AGENTS
    Publication number: 20100081759
    Abstract: A pre-adhesive composition is described comprising an acid-functional (meth)acrylate copolymer and an aziridine crosslinking agent, which when crosslinked provides a pressure-sensitive adhesive and pressure-sensitive adhesive articles.
    Type: Application
    Filed: December 8, 2009
    Publication date: April 1, 2010
    Inventors: Maureen A. Kavanagh, Kelly S. Anderson, Belma Erdogan, Larry R. Krepski, Sanat Mohanty, Timothy D. Filiatrault, Babu N. Gaddam
  • AZLACTONE TELECHELIC POLYMER
    Publication number: 20100076169
    Abstract: A curable composition is described comprising a Michael donor component, a polyacryl component, and 1) an ethylenically unsaturated monomer having a reactive azlactone functional group, or 2) an ethylenically unsaturated monomer having a reactive ring-opened azlactone functional group. A telechelic polymer that is the reaction product of these components is also described.
    Type: Application
    Filed: December 2, 2009
    Publication date: March 25, 2010
    Inventors: Kevin M. Lewandowski, Duane D. Fansler, Babu N. Gaddam
  • Hardenable self-supporting structures and methods
    Patent number: 7674850
    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: August 15, 2002
    Date of Patent: March 9, 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