Method for determining the compositional distribution of a crystalline copolymer
Patent 5008204 Issued on April 16, 1991. Estimated Expiration Date: 
April 16, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 16, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesGraft copolymer in polyamide polyethylene blends Cable with corrosion inhibiting adhesive High temperature continuous viscometry coupled with analytic temperature rising elution fractionation for evaluating crystalline and semi-crystalline polymers Patent #: 4798081 InventorAssigneeApplicationNo. 151350 filed on 02/02/1988US Classes:436/85, SYNTHETIC OR NATURAL RESIN73/53.01, LIQUID ANALYSIS OR ANALYSIS OF THE SUSPENSION OF SOLIDS IN A LIQUID73/64.54, Molecular weight210/656, Chromatography210/774, Including temperature change436/161INCLUDING CHROMATOGRAPHYExaminersPrimary: Hill, Robert J. Jr.Attorney, Agent or FirmInternational ClassesG01N 025/00G01N 030/02 G01N 031/02 G01N 033/44 AbstractA method for fractionating crystalline copolymers to determine solubility distribution as a function of temperature. Fractionation is conducted by passing a solvent through a column containing the crystallized copolymer at an increasing temperature from 6° C. to about 120° C. The polymer solution exiting the column is analyzed by infrared spectroscopy or NMR to determine the composition distribution of the copolymer.Other References
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