Bis-β-hydroxyethyl terephthalate

Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters

Reexamination Certificate

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Details

Other Related Categories

C560S078000, C560S089000, C560S096000, C560S098000

Type

Reexamination Certificate

Status

active

Patent number

07030264

Description

ABSTRACT:
Bis-β-hydroxyethyl terephthalate having an optical density measured in a 10 wt % methanol solution at a measurement wavelength of 380 nm and a cell optical path length of 10 mm of 0.000 to 0.006. The present invention makes it clear that purified BHET having an optical density of 0.006 or less provides high-quality PET having excellent purity, whiteness and transparency.

REFERENCES:
patent: 3776945 (1973-12-01), Ligorati et al.
patent: 5476919 (1995-12-01), Schaeffer
patent: 5672729 (1997-09-01), Naujokas
patent: 5750776 (1998-05-01), Harvie
patent: 5869543 (1999-02-01), Boos et al.
patent: 0723951 (1996-01-01), None
patent: 1 120 394 (2001-08-01), None
patent: 1 254 888 (2002-11-01), None
patent: 1143072 (1969-02-01), None
patent: 1344487 (1974-01-01), None
patent: 50-89340 (1975-07-01), None
patent: 2000-053802 (2000-02-01), None
patent: 2000-159729 (2000-06-01), None
patent: 2000-169623 (2000-06-01), None
patent: 2000-191593 (2000-07-01), None
patent: 2000-239233 (2000-09-01), None
1-page PCT Form IB/338 with attached 6-page PCT Form IPEA/409 (International Preliminary Examination Report) in English.
European Search Report for EP 00 94 8347 citing above two references.

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