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).

  • 2-OCTYL (METH)ACRYLATE ADHESIVE COMPOSITION
    Publication number: 20080213584
    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: Application
    Filed: April 14, 2008
    Publication date: September 4, 2008
    Inventors: KELLY S. ANDERSON, Kevin M. Lewandowski, Duane D. Fansler, Babu N. Gaddam, Eugene G. Joseph
  • PRESSURE-SENSITIVE ADHESIVE CONTAINING ACICULAR SILICA PARTICLES CROSSLINKED WITH POLYFUNCTIONAL AZIRIDINES
    Publication number: 20080200587
    Abstract: An adhesive composition comprising an emulsion polymer which comprises a (meth)acrylate copolymer, and acicular silica particles, crosslinked by a polyfunctional aziridine crosslinking agent is described.
    Type: Application
    Filed: February 16, 2007
    Publication date: August 21, 2008
    Inventors: Timothy D. Filiatrault, Kevin M. Lewandowski, Kelly S. Anderson, Babu N. Gaddam, Eugene G. Joseph
  • Acrylate adhesives containing silica nanoparticles crosslinked with polyfunctional aziridines
    Patent number: 7393901
    Abstract: A pressure sensitive adhesive is described comprising an acrylate copolymer, silica nanoparticles and crosslinked by a polyfunctional aziridine crosslinking agent.
    Type: Grant
    Filed: February 16, 2007
    Date of Patent: July 1, 2008
    Assignee: 3M Innovative Properties Company
    Inventors: Timothy D. Filiatrault, Kevin M. Lewandowski, Kelly S. Anderson, Babu N. Gaddam, Eugene G. Joseph
  • 2-octyl (meth)acrylate adhesive composition
    Patent number: 7385020
    Abstract: A pressure sensitive adhesive composition comprising a 2-octyl (meth)acrylate/(meth)acrylic acid copolymer and a crosslinking agent is described. The adhesive composition may be derived from renewable resources and provides good peel, shear and high temperature stability.
    Type: Grant
    Filed: October 13, 2006
    Date of Patent: June 10, 2008
    Assignee: 3M Innovative Properties Company
    Inventors: Kelly S. Anderson, Kevin M. Lewandowski, Duane D. Fansler, Babu N. Gaddam, Eugene G. Joseph
  • Reactive hydrophilic oligomers
    Patent number: 7384984
    Abstract: Hydrophilic compositions are described, which are prepared from a first component oligomer containing pendent hydrophilic groups and pendent reactive functional groups capable of reaction at effective rates (at normal processing temperatures), with a co-reactive second component possessing functionality that is complementary to that of the first oligomer. The compositions may be used as in preparation of hydrophilic gel coatings or layers for medical devices.
    Type: Grant
    Filed: December 10, 2003
    Date of Patent: June 10, 2008
    Assignee: 3M Innovative Properties Company
    Inventors: Kevin M. Lewandowski, Duane D. Fansler, Michael S. Wendland, Steven M. Heilmann, Babu N. Gaddam
  • AZLACTONE TELECHELIC POLYMER
    Publication number: 20080119625
    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: November 14, 2007
    Publication date: May 22, 2008
    Inventors: Kevin M. LEWANDOWSKI, Duane D. Fansler, Babu N. Gaddam
  • 2-OCTYL (METH)ACRYLATE ADHESIVE COMPOSITION
    Publication number: 20080087196
    Abstract: A pressure sensitive adhesive composition comprising a 2-octyl (meth)acrylate/(meth)acrylic acid copolymer and a crosslinking agent is described. The adhesive composition may be derived from renewable resources and provides good peel, shear and high temperature stability.
    Type: Application
    Filed: October 13, 2006
    Publication date: April 17, 2008
    Inventors: Kelly S. Anderson, Kevin M. Lewandowski, Duane D. Fansler, Babu N. Gaddam, Eugene G. Joseph
  • Crosslinkable hydrophilic materials from reactive oligomers having pendent unsaturated groups
    Patent number: 7342047
    Abstract: The present invention provides cross linkable compositions useful in the preparation of hydrophilic gels, and are prepared from obligers having pendent hydrophilic ploy(alkenylene oxide) groups, and pendent pulverizable functional groups, and cross linked by polyfunctional ploy(alkenylene oxides).
    Type: Grant
    Filed: March 2, 2004
    Date of Patent: March 11, 2008
    Assignee: 3M Innovative Properties Company
    Inventors: Kevin M. Lewandowski, Duane D. Fansler, Michael S. Wendland, Steven M. Heilmann, Babu N. Gaddam
  • Crosslinkable hydrophilic materials from polymers having pendent Michael donor groups
    Patent number: 7335690
    Abstract: The present invention provides crosslinkable compositions useful in the preparation of hydrophilic gels, and are prepared from polymers having pendent hydrophilic groups, and pendant Michael donor groups, and crosslinked by polyacryl Michael acceptor compounds.
    Type: Grant
    Filed: January 25, 2005
    Date of Patent: February 26, 2008
    Assignee: 3M Innovative Properties Company
    Inventors: David J. Plaut, Duane D. Fansler, Kevin M. Lewandowski, Babu N. Gaddam
  • Ring-opened azlactone telechelic polymer
    Patent number: 7332546
    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: October 1, 2004
    Date of Patent: February 19, 2008
    Assignee: 3M Innovative Properties Company
    Inventors: Duane D. Fansler, Kevin M. Lewandowski, Babu N. Gaddam
  • Photocurable Michael addition polymers
    Patent number: 7307106
    Abstract: A curable composition is described comprising a Michael donor component, a polyacryl component, and a monoacryl component, where at least one of the Michael donor or monoacryl components comprises a pendent photoinitiator group. A Michael addition polymer that is the Michael addition reaction product of these components is also described.
    Type: Grant
    Filed: December 10, 2004
    Date of Patent: December 11, 2007
    Assignee: 3M Innovative Properties Company
    Inventors: Duane D. Fansler, Kevin M. Lewandowski, Babu N. Gaddam
  • Azlactone telechelic polymer
    Patent number: 7304112
    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: October 1, 2004
    Date of Patent: December 4, 2007
    Assignee: 3M Innovative Properties Company
    Inventors: Kevin M. Lewandowski, Duane D. Fansler, Babu N. Gaddam
  • CURABLE HYDROPHILIC COMPOSITIONS
    Publication number: 20070275042
    Abstract: A curable composition is described, including a gel material derived from the curable composition, and medical articles including such material, wherein the transparent gel material includes a polymerized monofunctional poly(alkylene oxide) macromonomer component and a surface modified nanoparticle component.
    Type: Application
    Filed: May 23, 2006
    Publication date: November 29, 2007
    Inventors: Kelly S. ANDERSON, Kevin M. LEWANDOWSKI, David J. PLAUT, Wendy L. THOMPSON, Babu N. GADDAM
  • Ring-opened azlactone initiators for atom transfer radical polymerization
    Patent number: 7294742
    Abstract: Initiators for atom transfer radical polymerizations are described. The initiators have an azlactone or ring-opened azlactone moiety to provide telechelic (co)polymers.
    Type: Grant
    Filed: March 16, 2005
    Date of Patent: November 13, 2007
    Assignee: 3M Innovative Properties Company
    Inventors: Duane D. Fansler, Kevin M. Lewandowski, Babu N. Gaddam, Steven M. Heilmann, Larry R. Krepski, Stephen B. Roscoe, Michael S. Wendland
  • Crosslinkable hydrophilic materials from reactive oligomers having pendent photoinitiator groups
    Patent number: 7276247
    Abstract: The present invention provides crosslinkable compositions useful in the preparation of hydrophilic gels, and are prepared from oligomers having pendent hydrophilic, poly(alkylene oxide) groups, pendent photoinitiator groups, and optionally polymerizable functional groups, and crosslinked by polyfunctional poly(alkylene oxides).
    Type: Grant
    Filed: April 11, 2006
    Date of Patent: October 2, 2007
    Assignee: 3M Innovative Properties Company
    Inventors: Duane D. Fansler, Kevin M. Lewandowski, Michael S. Wendland, Babu N. Gaddam, Steven M. Heilmann
  • K-type polarizer and preparation thereof
    Patent number: 7087194
    Abstract: A process for preparing a polarizer is described whereby a pre-polarizing article comprising an oriented, vinylalcohol polymer film layer, and an acid donor layer comprising a thermal acid generator, is exposed to radiant energy at a temperature sufficient to effect a partial dehydration of the vinylalcohol polymer to a vinylalcohol/poly(acetylene) copolymer.
    Type: Grant
    Filed: April 4, 2002
    Date of Patent: August 8, 2006
    Assignee: 3M Innovative Properties Company
    Inventors: Todd D. Jones, Duane D. Fansler, Robert T. Fitzsimons, Jr., Wayne S. Mahoney, Kevin M. Lewandowski, Michael S. Wendland, Babu N. Gaddam
  • Reactive oligomers
    Patent number: 7074858
    Abstract: The present invention provides novel compositions prepared from a first oligomer containing reactive functional groups capable of reaction at effective rates (at normal processing temperatures) with a co-reactive second component oligomer possessing functionality that is complementary to that of the first oligomer. The compositions may be used as coatings, including hard surface coatings, clear coatings, powder coatings and pattern coatings; as adhesives, including pressure sensitive adhesives and hot melt adhesives; as sealants; as optical coatings; as blown microfibers (BMF); as high refractive index optical materials; as barrier films; in microreplication; as low adhesion backsizes, (LABs) and as release coatings.
    Type: Grant
    Filed: June 4, 2003
    Date of Patent: July 11, 2006
    Inventors: Steven M. Heilmann, Babu N. Gaddam, Ahmed S. Abuelyaman, Duane D. Fansler, Todd D. Jones, Maureen A. Kavanagh, Kevin M. Lewandowski, Michael S. Wendland
  • Crosslinkable hydrophilic materials from reactive oligomers having pendent photoinitiator groups
    Patent number: 7074839
    Abstract: The present invention provides crosslinkable compositions useful in the preparation of hydrophilic gels, and are prepared from oligomers having pendent hydrophilic, poly(alkylene oxide) groups, pendent photoinitiator groups, and optionally polymerizable functional groups, and crosslinked by polyfunctional poly(alkylene oxides).
    Type: Grant
    Filed: March 1, 2004
    Date of Patent: July 11, 2006
    Assignee: 3M Innovative Properties Company
    Inventors: Duane D. Fansler, Kevin M. Lewandowski, Michael S. Wendland, Babu N. Gaddam, Steven M. Heilmann
  • Ring-opened azlactone photoiniferters for radical polymerization
    Patent number: 7041755
    Abstract: Photoiniferters for controlled radical polymerizations are described. The photoiniferters have an azlactone or ring-opened azlactone moiety to provide telechelic (co)polymers.
    Type: Grant
    Filed: March 16, 2005
    Date of Patent: May 9, 2006
    Assignee: 3M Innovative Properties Company
    Inventors: Kevin M. Lewandowski, Michael S. Wendland, Duane D. Fansler, Steven M. Heilmann, Babu N. Gaddam
  • Reactive oligomers
    Patent number: 7015286
    Abstract: The present invention provides melt-processible adhesive compositions prepared from a first oligomer containing reactive functional groups capable of reaction at effective rates (at normal processing temperatures) with a co-reactive second component oligomer possessing functionality that is complementary to that of the first oligomer. The compositions may be used as coatings, including hard surface coatings, clear coatings, powder coatings and pattern coatings; as adhesives, including pressure sensitive adhesives and hot melt adhesives; as sealants; as optical coatings; as blown microfibers (BMF); as high refractive index optical materials; as barrier films; in microreplication; as low adhesion backsizes, (LABs) and as release coatings.
    Type: Grant
    Filed: June 4, 2003
    Date of Patent: March 21, 2006
    Assignee: 3M Innovative Properties Company
    Inventors: Steven M. Heilmann, Babu N. Gaddam, Ahmed S. Abuelyaman, Duane D. Fansler, Todd D. Jones, Maureen A. Kavanagh, Kevin M. Lewandowski, Michael S. Wendland