Patents by Inventor Chander P. Chawla

Chander P. Chawla 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: 20090171011
    Abstract: Optical fiber coatings are disclosed having excellent ribbon stripping and adhesion behavior. The coatings are radiation-curable. The excellent stripping and adhesion behavior can be achieved by several means which include by use of additives, by use of radiation-curable oligomers having higher molecular weight, or by use of coatings having certain thermal properties. Combination of means can be employed. Stripping behavior can be measured by crack propagation and fiber friction measurements.
    Type: Application
    Filed: November 14, 2008
    Publication date: July 2, 2009
    Applicant: DSM IP ASSETS B.V.
    Inventors: David M. Szum, Chander P. Chawla, James R. Petisce, John T. Vandeberg, George Pasternack, Timothy E. Bishop, Paul E. Snowwhite, Edward P. Zahora, Stephen C. Lapin
  • Patent number: 7135229
    Abstract: The present invention relates to a radiation-curable solvent-free coating composition for optical fiber having a radiation-curable urethane (meth)acrylate oligomer comprising an alkyd backbone,a reactive diluent, and a photoinitiator, and optionally an additive.
    Type: Grant
    Filed: August 13, 2003
    Date of Patent: November 14, 2006
    Assignee: DSM IP Assets B.V.
    Inventors: Anthony J. Tortorello, Eva Montgomery, Chander P. Chawla
  • Patent number: 6951910
    Abstract: The present invention provides radiation-curable compositions for coating plastic substrates, wherein the compositions, after cure, have a combination of sufficient adhesion, flexibility, and hardness. The compositions include: (a) at least one component comprised of a metal oxide bonded to an organic compound, said organic compound having (i) a radiation curable group; and (ii) a group represented by the following formula (1): ?wherein X represents an amine (NH), oxygen (O), or sulfur (S) radical; and Y represents an oxygen (O), or sulfur (S) radical; (b) a poly(meth)acrylate compound; and (c) an adhesion promoter.
    Type: Grant
    Filed: September 14, 2001
    Date of Patent: October 4, 2005
    Assignee: DSM IP Assets B.V.
    Inventors: Chander P. Chawla, Christopher Tronche
  • Patent number: 6762002
    Abstract: This invention discloses compositions adapted to produce, through solid imaging means, excellent quality objects having material properties that simulate the look and feel of polypropylene articles.
    Type: Grant
    Filed: September 10, 2001
    Date of Patent: July 13, 2004
    Assignee: DSM Desotech, Inc.
    Inventors: John A. Lawton, Chander P. Chawla
  • Patent number: 6749976
    Abstract: This invention discloses compositions adapted to produce, through solid imaging means, excellent quality objects having material properties that simulate the look and feel of polypropylene articles.
    Type: Grant
    Filed: January 4, 2002
    Date of Patent: June 15, 2004
    Assignee: DSM Desotech, Inc.
    Inventors: John A. Lawton, Chander P. Chawla
  • Publication number: 20040091799
    Abstract: This invention discloses compositions adapted to produce, through solid imaging means, excellent quality objects having material properties that simulate the look and feel of polypropylene articles.
    Type: Application
    Filed: June 27, 2003
    Publication date: May 13, 2004
    Inventors: John A Lawton, Chander P Chawla
  • Publication number: 20040048946
    Abstract: The present invention relates to a radiation-curable solvent-free coating composition for optical fiber having a radiation-curable urethane (meth)acrylate oligomer comprising an alkyd backbone,a reactive diluent, and a photoinitiator, and optionally an additive
    Type: Application
    Filed: August 13, 2003
    Publication date: March 11, 2004
    Inventors: Anthony Tortorello, Eva Montgomery, Chander P. Chawla
  • Patent number: 6661959
    Abstract: Optical fiber coatings are disclosed having excellent ribbon stripping and adhesion behavior. The coatings are radiation-curable. The excellent stripping and adhesion behavior can be achieved by several means which include by use of additives, by use of radiation-curable oligomers having higher molecular weight, or by use of coatings having certain thermal properties. Combination of means can be employed. Stripping behavior can be measured by crack propagation and fiber friction measurements.
    Type: Grant
    Filed: December 6, 2001
    Date of Patent: December 9, 2003
    Assignee: DSM N.V.
    Inventors: David M. Szum, Chander P. Chawla, James R. Petisce, John T. Vandeberg, George Pasternack, Timothy E. Bishop, Paul E. Snowwhite, Edward P. Zahora, Stephen C. Lapin
  • Patent number: 6638616
    Abstract: The present invention relates to a radiation-curable solvent-free coating composition for optical fiber having a radiation-curable urethane (meth)acrylate oligomer comprising an alkyd backbone, a reactive diluent, a photoinitiator and, optionally, an additive.
    Type: Grant
    Filed: October 15, 1999
    Date of Patent: October 28, 2003
    Assignee: DSM N.V.
    Inventors: Anthony J. Tortorello, Eva Montgomery, Chander P. Chawla
  • Publication number: 20030147614
    Abstract: Optical fiber coatings are disclosed having excellent ribbon stripping and adhesion behavior. The coatings are radiation-curable. The excellent stripping and adhesion behavior can be achieved by several means which include by use of additives, by use of radiation-curable oligomers having higher molecular weight, or by use of coatings having certain thermal properties. Combination of means can be employed. Stripping behavior can be measured by crack propagation and fiber friction measurements.
    Type: Application
    Filed: April 10, 2002
    Publication date: August 7, 2003
    Applicant: DSM N.V.
    Inventors: David M. Szum, Chander P. Chawla, James R. Petisce, John T. Vandeberg, George Pasternack, Timothy E. Bishop, Paul E. Snowwhite, Edward P. Zahora, Stephen C. Lapin
  • Publication number: 20030147615
    Abstract: Optical fiber coatings are disclosed having excellent ribbon stripping and adhesion behavior. The coatings are radiation-curable. The excellent stripping and adhesion behavior can be achieved by several means which include by use of additives, by use of radiation-curable oligomers having higher molecular weight, or by use of coatings having certain thermal properties. Combination of means can be employed. Stripping behavior can be measured by crack propagation and fiber friction measurements.
    Type: Application
    Filed: June 5, 2002
    Publication date: August 7, 2003
    Inventors: David M. Szum, Chander P. Chawla, James R. Petisce, John T. Vandeberg, George Pasternack, Timothy E. Bishop, Paul E. Snowwhite, Edward P. Zahora, Stephen C. Lapin
  • Patent number: 6534557
    Abstract: Optical fiber primary coating systems are disclosed having excellent ribbon stripping and adhesion behavior. The coatings are radiation-curable. The excellent stripping and adhesion behavior can be inner piramry coating composition having a slip enhancing component and a high modulus outer primary coating composition. Combination of means can be employed. Stripping behavior can be measured by crack propagation and fiber friction measurements.
    Type: Grant
    Filed: July 15, 1999
    Date of Patent: March 18, 2003
    Assignee: DSM N.V.
    Inventors: David M. Szum, Chander P. Chawla, James R. Petisce, George Pasternack, Timothy E. Bishop, Paul E. Snowwhite, Edward P. Zahora
  • Publication number: 20030008950
    Abstract: Optical disc adhesives and lacquers comprising components that undergo free-radical polymerization when exposed to radiation and a cure-enhancing amount of R-SH, wherein R is a heterocycle; cationic, free-radical, and hybrid adhesives for digital versatile discs (DVD) comprising components that undergo cationic and/or free-radical polymerization when exposed to radiation and a corrosion-inhibiting amount of R-SH, R1-R2 and/or an acyclic thiol, wherein R is a heterocycle, R1 is a substituted or unsubstituted phenyl as a substituent of R2 or forming with R2 a bicyclic structure, and R2 is a heterocycle comprising at least one double bond and at least two N atoms; and optical media, e.g., CD-DA, CD-ROM, CD-R, DVD, and the like, that include one, or a combination, of the foregoing inventive adhesive or lacquer compositions.
    Type: Application
    Filed: November 13, 2001
    Publication date: January 9, 2003
    Applicant: DSM N.V.
    Inventors: Chander P. Chawla, Michael G. Sullivan, Vadim V. Krongauz, Christopher F. Tronche
  • Publication number: 20030002845
    Abstract: The present invention provides radiation-curable compositions that include an alkoxylated aliphatic reactive diluent. It has been found that alkoxylated aliphatic reactive diluents may, inter alia, improve the cure speed of radiation-curable compositions. The present compositions are useful in a wide variety of applications, such as, for instance, in optical fiber applications.
    Type: Application
    Filed: January 11, 2002
    Publication date: January 2, 2003
    Inventors: Chander P. Chawla, Eva I. Montgomery
  • Publication number: 20020183415
    Abstract: Optical fiber primary coating systems are disclosed having excellent ribbon stripping and adhesion behavior. The coatings are radiation-curable. The excellent stripping and adhesion behavior can be inner piramry coating composition having a slip enhancing component and a high modulus outer primary coating composition. Combination of means can be employed. Stripping behavior can be measured by crack propagation and fiber friction measurements.
    Type: Application
    Filed: July 15, 1999
    Publication date: December 5, 2002
    Inventors: DAVID M. SZUM, CHANDER P. CHAWLA, JAMES R. PETISCE, GEORGE PASTERNACK, TIMOTHY E. BISHOP, PAUL E. SNOWWHITE, EDWARD P. ZAHORA
  • Publication number: 20020181913
    Abstract: Optical fiber coatings are disclosed having excellent ribbon stripping and adhesion behavior. The coatings are radiation-curable. The excellent stripping and adhesion behavior can be achieved by several means which include by use of additives, by use of radiation-curable oligomers having higher molecular weight, or by use of coatings having certain thermal properties. Combination of means can be employed. Stripping behavior can be measured by crack propagation and fiber friction measurements.
    Type: Application
    Filed: April 10, 2002
    Publication date: December 5, 2002
    Applicant: DSM N.V.
    Inventors: David M. Szum, Chander P. Chawla, James R. Petisce, John T. Vandeberg, George Pasternack, Timothy E. Bishop, Paul E. Snowwhite, Edward P. Zahora, Stephen C. Lapin
  • Publication number: 20020168163
    Abstract: Optical fiber coatings are disclosed having excellent ribbon stripping and adhesion behavior. The coatings are radiation-curable. The excellent stripping and adhesion behavior can be achieved by several means which include by use of additives, by use of radiation-curable oligomers having higher molecular weight, or by use of coatings having certain thermal properties. Combination of means can be employed. Stripping behavior can be measured by crack propagation and fiber friction measurements.
    Type: Application
    Filed: December 6, 2001
    Publication date: November 14, 2002
    Inventors: David M. Szum, Chander P. Chawla, James R. Petisce, John T. Vandeberg, George Pasternack, Timothy E. Bishop, Paul E. Snowwhite, Edward P. Zahora, Stephen C. Lapin
  • Publication number: 20020151615
    Abstract: The present invention relates to a radiation-curable solvent-free coating composition for optical fiber having a radiation-curable urethane (meth)acrylate oligomer comprising an alkyd backbone, a reactive diluent, and a photoinitiator, and optionally an additive
    Type: Application
    Filed: October 15, 1999
    Publication date: October 17, 2002
    Inventors: ANTHONY J. TORTORELLO, EVA MONTGOMERY, CHANDER P. CHAWLA
  • Publication number: 20020106584
    Abstract: This invention discloses compositions adapted to produce, through solid imaging means, excellent quality objects having material properties that simulate the look and feel of polypropylene articles.
    Type: Application
    Filed: September 10, 2001
    Publication date: August 8, 2002
    Inventors: John A. Lawton, Chander P. Chawla
  • Publication number: 20020081505
    Abstract: This invention discloses compositions adapted to produce, through solid imaging means, excellent quality objects having material properties that simulate the look and feel of polypropylene articles.
    Type: Application
    Filed: January 4, 2002
    Publication date: June 27, 2002
    Applicant: DSM Desotech Inc.
    Inventors: John A. Lawton, Chander P. Chawla