US Patent 7335719 Polyester based on poly(trimethylene terephthalate)

Patent 7335719 was granted and assigned to Teijin on February, 2008 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Teijin

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7335719

Date of Patent

February 26, 2008

Patent Application Number

10466304

Date Filed

July 5, 2002

Patent Primary Examiner

‌

Terressa Boykin

Patent abstract

A polyester based on poly(trimethylene terephthalate) consisting essentially of trimethylene terephthalate repeating units, comprising at least one kind of compound selected from the group consisting of alkali metal compounds, alkaline earth metal compounds and manganese compounds in an amount of 10 to 150 ppm expressed in terms of the metal element in a molar ratio of the total amount of elements of the contained alkali metal elements, alkaline earth metal elements and manganese element to the amount of the contained phosphorus element within the range of the following formula (I):0≦P/M≦1 (I)wherein, P is the molar amount of the phosphorus element in the polyester; M is the total amount of the alkali metal elements, alkaline earth metal elements and manganese element.