Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Reexamination Certificate
2007-07-31
2007-07-31
Boykin, Terressa (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
C422S131000, C422S160000, C422S177000, C423S243080, C423S244060, C528S198000, C528S370000, C528S372000
Reexamination Certificate
active
11169101
ABSTRACT:
An improvement to the melt transesterification process for the preparation of polycarbonate is disclosed. The improvement entails adding to the process between its medium viscosity reactor and a high viscosity reactor at least one bridged ester of organic sulphur-containing acid.
REFERENCES:
patent: 4104264 (1978-08-01), Dixon et al.
patent: 5606007 (1997-02-01), Sakashita et al.
patent: 5644017 (1997-07-01), Drumright et al.
patent: 5674968 (1997-10-01), Drumright et al.
patent: 6613128 (2003-09-01), Simonaru et al.
patent: 2005/0131197 (2005-06-01), Hucks et al.
patent: 1 031 512 (1958-06-01), None
patent: 44 38 545 (1996-05-01), None
patent: 63051429 (1988-03-01), None
patent: 07224161 (1995-08-01), None
patent: 02/46272 (2002-06-01), None
Bunzel Lothar
Buts Marc
Heuer Helmut-Werner
Möthrath Melanie
Pfingst Thomas
Bayer MaterialScience AG
Boykin Terressa
Gil Joseph C.
Preis Aron
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