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: 20040152853
    Abstract: Initiators for nitroxide-mediated radical polymerizations are described. The initiators have an azlactone or ring-opened azlactone moiety to provide telechelic (co)polymers.
    Type: Application
    Filed: December 3, 2003
    Publication date: August 5, 2004
    Applicant: 3M Innovative Properties Company
    Inventors: Duane D. Fansler, Kevin M. Lewandowski, Michael S. Wendland, Babu N. Gaddam
  • Patent number: 6762257
    Abstract: Chain transfer agents for controlled radical polymerizations (RAFT) are described. The chain transfer agents have an azlactone or ring-opened azlactone moiety to provide telechelic (co)polymers.
    Type: Grant
    Filed: May 5, 2003
    Date of Patent: July 13, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Kevin M. Lewandowski, Duane D. Fansler, Michael S. Wendland, Steven M. Heilmann, Babu N. Gaddam
  • Patent number: 6753391
    Abstract: Chain transfer agents for controlled radical polymerizations (RAFT) are described. The chain transfer agents have an azlactone or ring-opened azlactone moiety to provide telechelic (co)polymers.
    Type: Grant
    Filed: May 5, 2003
    Date of Patent: June 22, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Kevin M. Lewandowski, Duane D. Fansler, Michael S. Wendland, Babu N. Gaddam, Steven M. Heilmann
  • Publication number: 20040116616
    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: December 11, 2002
    Publication date: June 17, 2004
    Applicant: 3M Innovative Properties Company
    Inventors: Kevin M. Lewandowski, Duane D. Fansler, Babu N. Gaddam, Steven M. Heilmann, Larry R. Krepski, Stephen B. Roscoe, Michael S. Wendland
  • Publication number: 20040116633
    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: December 11, 2002
    Publication date: June 17, 2004
    Applicant: 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
  • Patent number: 6747104
    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 21, 2003
    Date of Patent: June 8, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Michael S. Wendland, Kevin M. Lewandowski, Duane D. Fansler, Babu N. Gaddam, Steven M. Heilmann
  • Publication number: 20040082683
    Abstract: The present invention provides a dental material that includes a hardenable resin system and a first initiator system capable of hardening the hardenable resin.
    Type: Application
    Filed: July 3, 2003
    Publication date: April 29, 2004
    Applicant: 3M Innovative Properties Company
    Inventors: Naimul Karim, Joel D. Oxman, Ahmed S. Abuelyaman, Babu N. Gaddam
  • Patent number: 6680362
    Abstract: Initiators for nitroxide-mediated radical polymerizations are described. The initiators have an azlactone or ring-opened azlactone moiety to provide telechelic (co)polymers.
    Type: Grant
    Filed: February 5, 2003
    Date of Patent: January 20, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Duane D. Fansler, Kevin M. Lewandowski, Michael S. Wendland, Babu N. Gaddam
  • Patent number: 6677402
    Abstract: Pressure sensitive adhesives are provided which possess high load bearing capabilities at elevated temperatures. The adhesives are prepared by polymerization of a syrup polymer composition having a first solute polymer having reactive, pendant functional groups, a second component having co-reactive functional groups, and a monomer mixture. The syrup polymer contains reactive electrophilic or nucleophilic functional groups that can subsequently crosslink by reaction with a second component having co-reactive functional groups.
    Type: Grant
    Filed: February 20, 2002
    Date of Patent: January 13, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Babu N. Gaddam, Steven M. Heilmann, Ahmed S. Abuelyaman
  • Patent number: 6677413
    Abstract: Initiators for nitroxide-mediated radical polymerizations are described. The initiators have an azlactone or ring-opened azlactone moiety to provide telechelic (co)polymers.
    Type: Grant
    Filed: February 5, 2003
    Date of Patent: January 13, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Kevin M. Lewandowski, Duane D. Fansler, Michael S. Wendland, Babu N. Gaddam
  • Patent number: 6664306
    Abstract: This invention relates to polymeric compositions that are processible and may be photochemically cured to produce crosslinked compositions useful in coating, sealants and adhesive applications. The crosslinkable composition comprises a first component having a plurality of pendent, free-radically polymerizable functional groups; a polymeric photoinitiator, and a residual content of less than 2%. The composition is melt processable at temperatures of less than or equal to 100° C.
    Type: Grant
    Filed: July 22, 2002
    Date of Patent: December 16, 2003
    Assignee: 3M Innovative Properties Company
    Inventors: Babu N. Gaddam, Steven M. Hellmann, Ahmed S. Abuelyaman, Maureen A. Kavanagh, Duane D. Fansler, Kevin M. Lewandowski
  • Publication number: 20030216519
    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: Application
    Filed: June 4, 2003
    Publication date: November 20, 2003
    Applicant: 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
  • Publication number: 20030212210
    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: Application
    Filed: June 4, 2003
    Publication date: November 13, 2003
    Applicant: 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
  • Publication number: 20030203011
    Abstract: A gel material and medical articles including such material, wherein the transparent gel material includes a polymerized poly(alkylene oxide) macromonomer that, prior to polymerization, is free-radically polymerizable, multifunctional (preferably difunctional), and has an average molecular weight of at least about 2000.
    Type: Application
    Filed: April 12, 2002
    Publication date: October 30, 2003
    Applicant: 3M Innovative Properties Company
    Inventors: Ahmed S. Abuelyaman, Scott A. Burton, Duane Fansler, Babu N. Gaddam, Paul Hattam, Maureen A. Kavanagh, Kevin M. Lewandowski, Peter M. Seiler, Steven C. Stickels
  • Patent number: 6635690
    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 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 19, 2001
    Date of Patent: October 21, 2003
    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
  • Publication number: 20030190491
    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: Application
    Filed: April 4, 2002
    Publication date: October 9, 2003
    Applicant: 3M Innovative Properties Company
    Inventors: Todd D. Jones, Duane D. Fansler, Robert T. Fitzsimons, Wayne S. Mahoney, Kevin M. Lewandowski, Michael S. Wendland, Babu N. Gaddam
  • Publication number: 20030189264
    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: Application
    Filed: April 4, 2002
    Publication date: October 9, 2003
    Applicant: 3M Innovative Properties Company
    Inventors: Todd D. Jones, Duane D. Fansler, Robert T. Fitzsimons, Wayne S. Mahoney, Kevin M. Lewandowski, Michael S. Wendland, Babu N. Gaddam
  • Patent number: 6624211
    Abstract: The present invention provides a dental material that includes a hardenable resin system and a first initiator system capable of hardening the hardenable resin.
    Type: Grant
    Filed: May 16, 2001
    Date of Patent: September 23, 2003
    Assignee: 3M Innovative Properties Company
    Inventors: Naimul Karim, Joel D. Oxman, Ahmed S. Abuelyaman, Babu N. Gaddam
  • Publication number: 20030157353
    Abstract: A process for preparing a polarizer is described whereby an article comprising an oriented, vinylalcohol polymer film layer, and an acid donor layer comprising a photoacid 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: Application
    Filed: February 12, 2002
    Publication date: August 21, 2003
    Applicant: 3M Innovative Properties Company
    Inventors: Duane D. Fansler, Todd D. Jones, Babu N. Gaddam, Robert T. Fitzsimons, Steven M. Heilmann, John J. Cael
  • Publication number: 20030134930
    Abstract: This invention relates to polymeric compositions that are processable and may be photochemically cured to produce crosslinked compositions useful in coating, sealants and adhesive applications. The crosslinkable composition comprises a first component having a plurality of pendent, free-radically polymerizable functional groups; a polymeric photoinitiator, and a residual content of less than 2%. The composition is melt processable at temperatures of less than or equal to 100° C.
    Type: Application
    Filed: July 22, 2002
    Publication date: July 17, 2003
    Applicant: 3M Innovative Properties Company
    Inventors: Babu N. Gaddam, Steven M. Hellmann, Ahmed S. Abuelyaman, Maureen A. Kavanagh, Duane D. Fansler, Kevin M. Lewandowski