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).

  • Publication number: 20140046029
    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: October 21, 2013
    Publication date: February 13, 2014
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Simon K. Shannon, Catherine A. Bothof, Babu N. Gaddam, Jerald K. Rasmussen, Richard B. Ross
  • Publication number: 20140039083
    Abstract: The present disclosure provides a method of providing an adhesive composition comprising the steps of combining crosslinkable composition including: a) a (meth)acryloyl monomer mixture with the b) photocrosslinking agent mixture, and irradiating with UVC radiation to polymerize and crosslink the composition.
    Type: Application
    Filed: March 27, 2012
    Publication date: February 6, 2014
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Larry R. Krepski, Babu N. Gaddam, Marie Aloshyna ep Lesuffleur, Arlin L. Weikel, Kathleen S. Shafer
  • Patent number: 8637614
    Abstract: Epoxy reactive liquid modifiers include acrylate functionalized compounds, acrylamide functionalized compounds, oxalic amide functionalized compounds, actoacetoxy functionalized urethanes and acetoacetoxy functionalized polyalkenes. The reactive liquid modifiers are incorporated into epoxy resin compositions comprising a curable epoxy resin, an amine curing agent, and the reactive liquid modifier, wherein the reactive liquid modifier is polymerized to form at least one of an interpenetrating polymer network and a semi-interpenetrating polymer network with the curable epoxy resin.
    Type: Grant
    Filed: July 22, 2009
    Date of Patent: January 28, 2014
    Assignee: 3M Innovative Properties Company
    Inventors: Ilya Gorodisher, Alphonsus V. Pocius, Babu N. Gaddam, Richard G. Hansen
  • Patent number: 8629209
    Abstract: The disclose provides pressure-sensitive adhesives and adhesive sealants prepared from alkoxysilane modified, crosslinked isobutylene copolymers, and tape articles prepared therefrom.
    Type: Grant
    Filed: November 2, 2011
    Date of Patent: January 14, 2014
    Assignee: 3M Innovative Properties Company
    Inventors: Hae-Seung Lee, Joon Chatterjee, Babu N. Gaddam, Gregg A. Caldwell
  • Publication number: 20130338251
    Abstract: Surface-modified zirconia nanoparticles include zirconia nanoparticles and surface-modifying ligands attached to the zirconia nanoparticles. The ligand includes a hydroxamate functionality, and either a reactive group or an oligomeric group. Reactive groups include chain transfer groups or photoinitiator groups. Oligomeric groups include poly(meth)acrylate or poly(meth)acrylamide groups. Articles can be prepared that include the surface-modified zirconia nanoparticles in an organic matrix.
    Type: Application
    Filed: December 13, 2011
    Publication date: December 19, 2013
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Guy D. Joly, Nathan E. Schultz, Babu N. Gaddam
  • Patent number: 8609131
    Abstract: An absorbent dressing is described which comprises a crosslinked hydrophilic gel absorbent layer comprising a first component polymer comprising a plurality of polymerized monomer units having pendent hydrophilic groups, and pendent Michael donor groups; and a crosslinking agent comprising at least two Michael acceptor groups.
    Type: Grant
    Filed: January 25, 2005
    Date of Patent: December 17, 2013
    Assignee: 3M Innovative Properties Company
    Inventors: David J. Plaut, Duane D. Fansler, Kevin M. Lewandowski, Babu N. Gaddam
  • Publication number: 20130324651
    Abstract: Presently described is an adhesive composition comprising at least one isobutylene polymer and an alkyl amine adhesion promoting agent. The alkyl amine is unreactive with respect to the isobutylene polymer. In favored embodiments, the alkyl amine adhesion promoting agent comprises an alkyl group having 6-24 carbon atoms. Further, the isobutylene polymer is a non-halogenated copolymer or homopolymer. Also described are adhesive articles a pressure sensitive adhesive, as described herein on a backing The adhesive is particularly suitable for articles intended for use in a wet environment such as kitchen or bath articles.
    Type: Application
    Filed: June 5, 2012
    Publication date: December 5, 2013
    Inventors: Guy D. Joly, Sarah J. Moench, Leon Levitt, Babu N. Gaddam
  • Patent number: 8597784
    Abstract: The disclose provides pressure-sensitive adhesives and adhesive sealants prepared from modified, crosslinked isobutylene copolymers, and tape articles prepared therefrom.
    Type: Grant
    Filed: June 27, 2011
    Date of Patent: December 3, 2013
    Assignee: 3M Innovative Properties Company
    Inventors: Hae-Seung Lee, Guy D. Joly, Joon Chatterjee, Marie Aloshyna ep Lesuffleur, Jay M. Jennen, Jingjing Ma, Gregg A. Caldwell, Babu N. Gaddam, Larry R. Krepski
  • Publication number: 20130316307
    Abstract: Dental compositions are described comprising an addition-fragmentation agent comprising at least one ethylenically unsaturated terminal group and a backbone unit comprising an ?,?-unsaturated carbonyl; at least one monomer comprising at least two ethylenically unsaturated group; and inorganic oxide filler. The addition-fragmentation agent is preferably free-radically cleavable. The addition-fragmentation agent preferably comprises at least two ethylenically unsaturated terminal groups, such as (meth)acTylate groups. In some embodiments, the addition-fragmentation agent has the formula: wherein R1, R2 and R3 are each independently Zm, -Q-, a (hetero)alkyl group or a (hetero)aryl group with the proviso that at least one of R1, R2 and R3 is Zm-Q-; Q is a linking group have a valence of m+1; Z is an ethylenically unsaturated polymerizable group; m is 1 to 6; each X1 is independently —O— or —NR4—, where R4 is H or C1-C4 alkyl; and n is 0 or 1.
    Type: Application
    Filed: February 8, 2012
    Publication date: November 28, 2013
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Guy D. Joly, Larry R. Krepski, Babu N. Gaddam, Ahmed S. Abuelyaman, Bradley D. Craig, Timothy D. Dunbar, Chuntao Cao, Joel D. Oxman, Afshin Falsafi, William H. Moser, Hoa T. Bui
  • Patent number: 8592493
    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: Grant
    Filed: May 11, 2009
    Date of Patent: November 26, 2013
    Assignee: 3M Innovative Properties Company
    Inventors: Simon K. Shannon, Catherine A. Bothof, Babu N. Gaddam, Jerald K. Rasmussen, Richard B. Ross
  • Publication number: 20130289219
    Abstract: A crosslinkable composition is described comprising an acid- and epoxy-functional copolymer, which when cross-linked with a triazine crosslinking agent provides a pressure-sensitive adhesive and pressure-sensitive adhesive articles.
    Type: Application
    Filed: November 17, 2011
    Publication date: October 31, 2013
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Larry R. Krepski, Marie Aloshyna ep Lesuffleur, Babu N. Gaddam
  • Patent number: 8530578
    Abstract: A pressure sensitive adhesive composition is described comprising unfunctionalized (e.g. polyisobutylene) synthetic rubber and an acrylic polymer having functionalized polyisobutylene polymer bonded to the acrylic polymer. In some embodiments, the functionalized polyisobutylene polymer has a first functional group hydrogen bonded with a second functional group present in the acrylic polymer backbone. In other embodiments, the functionalized polyisobutylene polymer is covalently bonded to the acrylic polymer backbone. Also described are adhesive articles, such as a tape, methods of adhesively bonding, and methods of making a pressure sensitive adhesive.
    Type: Grant
    Filed: November 15, 2010
    Date of Patent: September 10, 2013
    Assignee: 3M Innovative Properties Company
    Inventors: Vivek Bharti, Shujun Wang, Guy D. Joly, Babu N. Gaddam, Jingjing Ma, Sanat Mohanty, Peiwang Zhu
  • Patent number: 8524836
    Abstract: A pre-adhesive syrup copolymer composition comprising an acid functional acrylate solute copolymer, a monomer solvent mixture, and a polyaziridine crosslinking agent is disclosed.
    Type: Grant
    Filed: February 8, 2013
    Date of Patent: September 3, 2013
    Assignee: 3M Innovative Properties Company
    Inventors: Maureen A. Kavanagh, Belma Erdogan-Haug, Larry R. Krepski, Peiwang Zhu, Babu N. Gaddam, Dang Xie, Wen Jie Zhang, Qing Wu
  • Patent number: 8507612
    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: Grant
    Filed: February 22, 2010
    Date of Patent: August 13, 2013
    Assignee: 3M Innovative Properties Company
    Inventors: Peiwang Zhu, Zhong Chen, Babu N. Gaddam, Larry R. Krepski, Jingjing Ma, David B. Olson, Andrew Satrijo, Dong-Wei Zhu
  • Patent number: 8491749
    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: Grant
    Filed: July 22, 2009
    Date of Patent: July 23, 2013
    Assignee: 3M Innovative Properties Company
    Inventors: Ilya Gorodisher, Alphonsus V. Pocius, Babu N. Gaddam
  • Patent number: 8404778
    Abstract: A pre-adhesive syrup polymer composition is described comprising an acid-functional (meth)acrylate copolymer and an aminoalkyl (meth)acryloyl solvent monomer, which when polymerized, provides a pressure-sensitive adhesive and pressure-sensitive adhesive articles.
    Type: Grant
    Filed: June 6, 2012
    Date of Patent: March 26, 2013
    Assignee: 3M Innovative Properties Company
    Inventors: Belma Erdogan-Haug, Maureen A. Kavanagh, Marie Aloshyna ep Lesuffleur, Larry R. Krepski, Babu N. Gaddam
  • Publication number: 20130041084
    Abstract: Disclosed is a curable silicone composition for preparing release layers and pressure sensitive adhesives, and to substrates bearing a layer of the cured composition. More specifically, this invention relates to a silicone composition, curable in the absence of both catalysts and actinic radiation comprising a cyclic anhydride copolymer and an amine-terminated polysiloxane.
    Type: Application
    Filed: August 8, 2011
    Publication date: February 14, 2013
    Inventors: Joon Chatterjee, Timothy D. Filiatrault, Hae-Seung Lee, David S. Hays, Naimul Karim, Babu N. Gaddam
  • Patent number: 8349962
    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: Grant
    Filed: October 6, 2011
    Date of Patent: January 8, 2013
    Assignee: 3M Innovative Properties Company
    Inventors: Belma Erdogan, Timothy D. Filiatrault, Maureen A. Kavanagh, Larry R. Krepski, Babu N. Gaddam
  • Publication number: 20120322910
    Abstract: The disclosure provides pressure-sensitive adhesives and adhesive sealants prepared from amine-modified, crosslinked isobutylene copolymers, and tape articles prepared therefrom.
    Type: Application
    Filed: June 20, 2011
    Publication date: December 20, 2012
    Inventors: Joon Chatterjee, Hae-Seung Lee, Babu N. Gaddam
  • Publication number: 20120301715
    Abstract: A pre-adhesive composition is described comprising an acid- and epoxy-functional (meth)acryloyl copolymer, which when crosslinked using an ionic photoacid generator (PAG) provides a pressure-sensitive adhesive and pressure-sensitive adhesive articles having desirable properties.
    Type: Application
    Filed: June 8, 2011
    Publication date: November 29, 2012
    Inventors: Arlin L. Weikel, Larry R. Krepski, Jason D. Clapper, Wayne S. Mahoney, Babu N. Gaddam