Patents by Inventor Joelle R. Thomsen

Joelle R. Thomsen 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).

  • Polyesters and their manufacture from acids and glycol carbonates
    Patent number: 4594406
    Abstract: Poly(ethylene terephthalate), poly(1,4-cyclohexanedicarboxylate), poly(ethylene isophthalate), poly(ethylene naphthalate), their copolymers with each other and with modifying aliphatic dicarboxylic acids, and substituted glycol repeat unit modifications thereof are produced from prepolymer (oligomer) obtained from the esterification of the acid or acids with ethylene carbonate or substituted ethylenecarbonate in the presence of one or more amines compounds selected from trialkylamines, tetraalkyldiamines, N-alkylated heterocyclic amines, and certain quaternary ammonium salts, employing certain mole ratios of ethylene carbonate and substituted ethylene carbonate to the diacid. The prepolymer is formed in an unusually short time and the final polyester of high I.V. exhibits improvement in such properties as desirable light color and low ether-glycol level.
    Type: Grant
    Filed: March 21, 1985
    Date of Patent: June 10, 1986
    Assignee: Eastman Kodak Company
    Inventors: Joelle R. Thomsen, David R. Fagerburg
  • Polyesters and their manufacture from acids and glycol carbonates
    Patent number: 4521585
    Abstract: Poly(ethylene terephthalate), poly(1,4-cyclohexanedicarboxylate), poly(ethylene isophthalate), poly(ethylene naphthalate), their copolymers with each other and with modifying aliphatic dicarboxylic acids, and substituted glycol repeat unit modifications thereof are produced from prepolymer (oligomer) obtained from the esterification of the acid or acids with ethylene carbonate or substituted ethylenecarbonate in the presence of one or more amines compounds selected from trialkylamines, tetraalkyldiamines, N-alkylated heterocyclic amines, and certain quaternary ammonium salts, employing certain mole ratios of ethylene carbonate and substituted ethylene carbonate to the diacid. The prepolymer is formed in an unusually short time and the final polyester of high I.V. exhibits improvement in such properties as desirable light color and low ether-glycol level.
    Type: Grant
    Filed: June 30, 1983
    Date of Patent: June 4, 1985
    Assignee: Eastman Kodak Company
    Inventors: Joelle R. Thomsen, David R. Fagerburg