Patents by Inventor Rajan Hariharan

Rajan Hariharan 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).

  • Patent number: 6166151
    Abstract: A lactone chain-extended polyester polyol of the present invention comprises the reaction product of a lactone and a previously chain-extended phenolic-based hydroxyl compound. The previously chain-extended phenolic-based hydroxyl compound may comprise the reaction product of (i) a lactone or an alkoxylating agent selected from the group consisting of alkylene oxides and alkylene carbonates, and (ii) a phenolic aralkylation polymer comprising the reaction product of a phenolic monomer having at least two free reactive positions; a styrene derivative; and a coupling agent. The previously chain-extended phenolic-based hydroxyl compound also may be chain-extended by reacting with a lactam to produce a lactam chain-extended polyester polyamide. The polyols and polyamides of the present invention provide unique combinations of hard and soft functionalities, which translates into materials exhibiting a unique combination of toughness and hardness.
    Type: Grant
    Filed: June 22, 1999
    Date of Patent: December 26, 2000
    Assignee: Georgia-Pacific Resins, Inc.
    Inventors: Rajan Hariharan, David A. Hutchings, Kenneth A. Bourlier, Ellen V. Nagy
  • Patent number: 6011133
    Abstract: Poly(alkylene dicarboxylate) polymers and copolymers having tetraalkyl- or trialkylammonium ion end groups and methods of synthesis, thereof. The methylene-containing copolymers, in general, adhere to glass and metals, including aluminum, iron, and copper. Poly(methylene-co-ethylene terephthalate) is a clear film useful in the protection of metals or glass from corrosion or scratching. Glass may be bound to glass or to metal using the polymers of the present invention or metal to metal seals may be made.
    Type: Grant
    Filed: November 16, 1998
    Date of Patent: January 4, 2000
    Assignee: Baylor University
    Inventors: A. G. Pinkus, Rajan Hariharan
  • Patent number: 5837381
    Abstract: Poly(alkylene dicarboxylate) polymers and copolymers having tetraalkyl- or trialkylammonium ion end groups and methods of synthesis, thereof. The methylene-containing copolymers, in general, adhere to glass and metals, including aluminum, iron, and copper. Poly(methylene-co-ethylene terephthalate) is a clear film useful in the protection of metals or glass from corrosion or scratching. Glass may be bound to glass or to metal using the polymers of the present invention or metal to metal seals may be made.
    Type: Grant
    Filed: September 15, 1997
    Date of Patent: November 17, 1998
    Inventors: A. G. Pinkus, Rajan Hariharan
  • Patent number: 5807922
    Abstract: Novel organosilane derivatized long-chain compounds containing halosilane and hydroxysilane groups are disclosed and claimed. A process for the syntheses of these novel compositions is also disclosed, which involves simple one-pot hydrosilylation reaction of substituted halosilanes with substituted long-chain olefinic compounds, and subsequent hydrolysis to form surface active silanol derivatives. Preferred embodiments include organosilane derivatives of fatty acids derived from tung oil, high erucic acid rape seed oil, and linseed oil. These compositions feature high surface activity in forming stable organic/water emulsions of various difficultly emulsifiable materials as compared with conventional emulsifying agents. These compositions are useful as reactive-dispersants, defoamers, reactive-surfactants in emulsion polymerization, crosslinkers, film formers, gloss enhancers, anticorrosive additives, adhesion promoters and as general property enhancers in coatings, adhesives and inks.
    Type: Grant
    Filed: October 30, 1996
    Date of Patent: September 15, 1998
    Assignee: University of Southern Mississippi
    Inventors: Shelby Freland Thames, Kamlesh Gopichand Panjnani, Rajan Hariharan
  • Patent number: 5770750
    Abstract: Phenolic aralkylation polymers modified by esterification with fatty acids, transesterification with glyceride oils, or other modifications to reactive hydroxyl moieties to improve the characteristics and properties of coating systems in which the modified materials are incorporated. At least a portion of the hydroxyl moieties of the polyol is esterified or otherwise modified. The hydroxyl moieties include those that have been "chain-extended," if desired.
    Type: Grant
    Filed: January 10, 1997
    Date of Patent: June 23, 1998
    Assignee: Georgia-Pacific Resins, Inc.
    Inventors: David A. Hutchings, Rajan Hariharan, Edward Lucas, Jr., Syed A. Elahi, Alan K. Randall, Kenneth Bourlier
  • Patent number: 5668224
    Abstract: Poly(alkylene dicarboxylate) polymers and copolymers having tetraalkyl- or trialkylammonium ion end groups and methods of synthesis, thereof. The methylene-containing copolymers, in general, adhere to glass and metals, including aluminum, iron, and copper. Poly(methylene-co-ethylene terephthalate) is a clear film useful in the protection of metals or glass from corrosion or scratching. Glass may be bound to glass or to metal using the polymers of the present invention or metal to metal seals may be made.
    Type: Grant
    Filed: November 22, 1994
    Date of Patent: September 16, 1997
    Assignee: Baylor University
    Inventors: A. G. Pinkus, Rajan Hariharan
  • Patent number: 5561212
    Abstract: A poly(methylene oxalate) polymer, [poly(oxy(1,2-dioxo-1,2-ethanediyl)oxymethylene)], a bis(tetrabutylammonium) oxalate salt, methods of synthesis thereof and methods of use are provided. Poly(methylene oxalate) is nearly insoluble in all common organic solvents, does not melt and is resistant to fire. Applications are as a light-weight material for use at high temperatures, e.g., as a structural material in aircraft and space vehicles, as a binder for brake systems, and as an insulator for microelectronic components.
    Type: Grant
    Filed: January 17, 1995
    Date of Patent: October 1, 1996
    Assignee: Baylor University
    Inventors: Alvin G. Pinkus, Rajan Hariharan
  • Patent number: 5451643
    Abstract: Poly(alkylene dicarboxylate) polymers and copolymers having tetraalkyl- or trialkylammonium ion end groups and methods of synthesis, thereof. The methylene-containing copolymers, in general, adhere to glass and metals, including aluminum, iron, and copper. Poly(methylene-co-ethylene terephthalate) is a clear film useful in the protection of metals or glass from corrosion or scratching. Glass may be bound to glass or to metal using the polymers of the present invention or metal to metal seals may be made.
    Type: Grant
    Filed: September 17, 1993
    Date of Patent: September 19, 1995
    Assignee: Baylor University
    Inventors: A. G. Pinkus, Rajan Hariharan
  • Patent number: 5426218
    Abstract: A poly(methylene oxalate) polymer [poly(oxy(1,2-dioxo-1,2-ethanediyl)oxymethylene)], a bis(tetrabutylammonium)oxalate salt, methods of synthesis thereof and methods of use. Poly(methylene oxalate) is insoluble in all common organic solvents, does not melt and is resistant to fire. Applications are as a light-weight material for use at high temperatures, e.g. as a structural material in aircraft and space vehicles, as a binder for brake systems, and as an insulator for microelectronic components.
    Type: Grant
    Filed: September 13, 1994
    Date of Patent: June 20, 1995
    Assignee: Baylor University
    Inventors: A. G. Pinkus, Rajan Hariharan
  • Patent number: 5371171
    Abstract: A poly(methylene oxalate) polymer [poly(oxy(1,2-dioxo-1,2-ethanediyl)oxymethylene)], a bis(tetrabutylammonium) oxalate salt, methods of synthesis thereof and methods of use. Poly(methylene oxalate) is insoluble in all common organic solvents, does not melt and is resistant to fire. Applications are as a light-weight material for use at high temperatures, e.g. as a structural material in aircraft and space vehicles, as a binder for brake systems, and as an insulator for microelectronic components.
    Type: Grant
    Filed: March 5, 1993
    Date of Patent: December 6, 1994
    Assignee: Baylor University
    Inventors: A. G. Pinkus, Rajan Hariharan