Patents by Inventor Babu Gaddam

Babu 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).

  • (Meth)acryloyl-aziridine crosslinking agents and adhesive polymers
    Patent number: 8263711
    Abstract: Described is a pre-adhesive, curable composition comprising an acid-functional (meth)acrylate copolymer and a novel (meth)acryloyl-aziridine crosslinking agent, which when crosslinked provides a pressure-sensitive adhesive composition.
    Type: Grant
    Filed: August 4, 2010
    Date of Patent: September 11, 2012
    Assignee: 3M Innovative Properties Company
    Inventors: Larry R. Krepski, Peiwang Zhu, Belma Erdogan-Haug, Wen Jie Zhang, Dang Xie, Maureen A. Kavanagh, Marie Aloshyna ep Lesuffleur, Babu Gaddam, Qing Wu
  • CROSSLINKABLE ACRYLATE ADHESIVE POLYMER COMPOSITION
    Publication number: 20110178248
    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: Application
    Filed: August 4, 2010
    Publication date: July 21, 2011
    Inventors: Maureen A. Kavanagh, Belma Erdogan-Haug, Larry R. Krepski, Peiwang Zhu, Babu Gaddam, Dang Xie, Wen Jie Zhang, Qing Wu
  • (METH)ACRYLOYL-AZIRIDINE CROSSLINKING AGENTS AND ADHESIVE POLYMERS
    Publication number: 20110152445
    Abstract: Described is a pre-adhesive, curable composition comprising an acid-functional (meth)acrylate copolymer and a novel (meth)acryloyl-aziridine crosslinking agent, which when crosslinked provides a pressure-sensitive adhesive composition.
    Type: Application
    Filed: August 4, 2010
    Publication date: June 23, 2011
    Inventors: Larry R. Krepski, Peiwang Zhu, Belma Erdogan-Haug, Wen Jie Zhang, Dang Xie, Maureen A. Kavanagh, Marie Aloshyna ep Lesuffleur, Babu Gaddam, Qing Wu
  • CROSSLINKABLE HYDROPHILIC MATERIALS FROM POLYMERS HAVING PENDENT MICHAEL DONOR GROUPS
    Publication number: 20080119599
    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: Application
    Filed: January 28, 2008
    Publication date: May 22, 2008
    Inventors: David Plaut, Duane Fansler, Kevin Lewandowski, Babu Gaddam
  • Dental Compositions Containing Carbosilane Polymers
    Publication number: 20080045626
    Abstract: Carbosilane-containing polymers (including oligomers) having the following structural features: greater than one repeat unit; at least 4 Si-arylene bonds; at least 1 (meth)acrylate moiety, Si—H moiety, or both; no Si—O bonds; preferably at least 4 silicon atoms; wherein 2 silicon atoms are separated by one arylene group in each repeat unit.
    Type: Application
    Filed: July 13, 2005
    Publication date: February 21, 2008
    Inventors: Kevin Lewandowski, Ahmed Abuelyaman, Todd Jones, Babu Gaddam, Sumita Mitra, Naimul Karim, Andrian Eckert, Peter Bissinger
  • RING-OPENED AZLACTONE INITIATORS FOR ATOM TRANSFER RADICAL POLYMERIZATION
    Publication number: 20080027210
    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: Application
    Filed: October 8, 2007
    Publication date: January 31, 2008
    Inventors: Duane Fansler, Kevin Lewandowski, Babu Gaddam, Steven Heilmann, Larry Krepski, Stephen Roscoe, Michael Wendland
  • Dental Compositions Containing Carbosilane Monomers
    Publication number: 20070276059
    Abstract: Carbosilane monomers that include the following structural features: at least two Si-arylene bonds; at least one (meth)acrylate moiety; no Si—O bonds; and preferably at least two silicon atoms.
    Type: Application
    Filed: July 13, 2005
    Publication date: November 29, 2007
    Inventors: Kevin Lewandowski, Ahmed Abuelyaman, Babu Gaddam, Sumita Mitra, Brian Holmes, Adrian Eckert, Peter Bissinger
  • PRESSURE-SENSITIVE ADHESIVE CONTAINING SILICA NANOPARTICLES
    Publication number: 20070213449
    Abstract: An adhesive composition comprising an emulsion polymer which comprises a (meth)acrylate copolymer and silica nanoparticles is described. The addition of the nanoparticles results in a significant increase in the overlap shear properties.
    Type: Application
    Filed: March 8, 2006
    Publication date: September 13, 2007
    Inventors: Kevin Lewandowski, Timothy Filiatrault, Kelly Anderson, Babu Gaddam, Eugene Joseph, Ying-Yuh Lu, John Stofko
  • HIGH SHEAR PRESSURE-SENSITIVE ADHESIVE
    Publication number: 20070213448
    Abstract: An adhesive composition comprising an emulsion polymer which comprises a (meth)acrylate copolymer and silica nanoparticles is described. The addition of the nanoparticles results in a significant increase in the overlap shear properties of the adhesive while maintaining the peel adhesion.
    Type: Application
    Filed: March 8, 2006
    Publication date: September 13, 2007
    Inventors: Kevin LEWANDOWSKI, Timothy FILIATRAULT, Kelly ANDERSON, Babu GADDAM, Eugene JOSEPH, Ying-Yuh LU
  • CURABLE COMPOSITIONS FOR OPTICAL ARTICLES
    Publication number: 20070191506
    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: Application
    Filed: February 13, 2006
    Publication date: August 16, 2007
    Inventors: Ying-Yuh Lu, Jianhui Xia, Peter Olofson, Ming Cheng, Mark Ellis, Babu Gaddam
  • RING-OPENED AZLACTONE TELECHELIC POLYMER
    Publication number: 20070191564
    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: March 27, 2007
    Publication date: August 16, 2007
    Inventors: Duane Fansler, Kevin Lewandowski, Babu Gaddam
  • METHODS FOR REDUCING BOND STRENGTHS, DENTAL COMPOSITIONS, AND THE USE THEREOF
    Publication number: 20070142497
    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: Application
    Filed: December 20, 2005
    Publication date: June 21, 2007
    Inventors: Rajdeep Kalgutkar, Joan Brennan, Babu Gaddam
  • Curable compositions containing dithiane monomers
    Publication number: 20070066748
    Abstract: The invention features compositions comprising at least one monomer that comprises a cyclic dithiane moiety attached to a (meth)acryloyl moiety. The composition may optionally contain additional polymerizable compounds, such as ethylenically unsaturated compounds, that are typically used in dental compositions.
    Type: Application
    Filed: September 19, 2005
    Publication date: March 22, 2007
    Inventors: Kevin Lewandowski, Ahmed Abuelyaman, David Plaut, Babu Gaddam
  • REACTIVE HYDROPHILIC OLIGOMERS
    Publication number: 20060292209
    Abstract: Hydrophilic compositions are described, which are prepared from a first oligomer containing pendent polymerizable groups and pendent hydrophilic groups, crosslinked with a co-reactive second component oligomer possessing photoinitiator groups. The compositions may be used as in preparation of hydrophilic gel coatings or layers for medical devices.
    Type: Application
    Filed: August 8, 2006
    Publication date: December 28, 2006
    Inventors: Kevin Lewandowski, Duane Fansler, Michael Wendland, Steven Heilmann, Babu Gaddam
  • Crosslinkable hydrophilic materials from polymers having pendent Michael donor groups
    Publication number: 20060167180
    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: Application
    Filed: January 25, 2005
    Publication date: July 27, 2006
    Inventors: David Plaut, Duane Fansler, Kevin Lewandowski, Babu Gaddam
  • CROSSLINKABLE HYDROPHILIC MATERIALS FROM REACTIVE OLIGOMERS HAVING PENDENT PHOTOINITIATOR GROUPS
    Publication number: 20060165999
    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: Application
    Filed: April 11, 2006
    Publication date: July 27, 2006
    Inventors: Duane FANSLER, Kevin LEWANDOWSKI, Michael WENDLAND, Babu GADDAM, Steven HEILMANN
  • Absorbent dressing comprising hydrophilic polymer
    Publication number: 20060165762
    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: Application
    Filed: January 25, 2005
    Publication date: July 27, 2006
    Inventors: David Plaut, Duane Fansler, Kevin Lewandowski, Babu Gaddam
  • Photocurable michael addition polymers
    Publication number: 20060128825
    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: Application
    Filed: December 10, 2004
    Publication date: June 15, 2006
    Inventors: Duane Fansler, Kevin Lewandowski, Babu Gaddam
  • Ring-opened azlactone telechelic polymer
    Publication number: 20060074211
    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: October 1, 2004
    Publication date: April 6, 2006
    Inventors: Duane Fansler, Kevin Lewandowski, Babu Gaddam
  • Azlactone telechelic polymer
    Publication number: 20060074196
    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: October 1, 2004
    Publication date: April 6, 2006
    Inventors: Kevin Lewandowski, Duane Fansler, Babu Gaddam