Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Reexamination Certificate
2011-08-16
2011-08-16
Boykin, Terressa M (Department: 1765)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
C528S198000
Reexamination Certificate
active
07999056
ABSTRACT:
The object of the present invention is to provide a method of producing plural kinds of aromatic polycarbonates by a melt process without changeover loss and quality deterioration. The present invention relates to a production method of an aromatic polycarbonate, comprising supplying a molten mixture of raw materials of an aromatic dihydroxy compound and/or a carbonic diester prepared in the absence of an ester exchange catalyst to polycondensation steps of two lines each equipped with three vertical reactors connected in series and one horizontal reactor, and at the same time, continuously conducting polycondensation reaction in the presence of an ester exchange catalyst.
REFERENCES:
patent: 6252034 (2001-06-01), Uenishi et al.
patent: 6277946 (2001-08-01), Van Heijkant et al.
patent: 7326467 (2008-02-01), Nakano et al.
patent: 2001 226478 (2001-08-01), None
patent: 2003 12792 (2003-01-01), None
patent: 2003 138002 (2003-05-01), None
patent: 2003 192782 (2003-07-01), None
patent: 2003 523429 (2003-08-01), None
patent: 2004 18624 (2004-01-01), None
patent: 2004 26916 (2004-01-01), None
U.S. Appl. No. 12/519,205, filed Jun. 15, 2009, Takahashi, et al.
Office Action Issued Sep. 9, 2010, in Chinese Patent Application No. 200780018458.8 (with English-language Translation).
Office Action issued Dec. 16, 2010, in European Patent Application No. 07 743 897.6-2102.
Hamano Toshiyuki
Miyamoto Masaaki
Miyamoto, legal representative Hanae
Miyamoto, legal representative Hideo
Miyamoto, legal representative Kodama
Boykin Terressa M
Mitsubishi Chemical Corporation
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
LandOfFree
Continuous production method and production apparatus of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Continuous production method and production apparatus of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Continuous production method and production apparatus of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2707843