Production method of polycarbonate resin

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9353215
APP PUB NO 20140030505A1
SERIAL NO

14041397

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

The present invention is a method for producing a polycarbonate resin, comprising performing polycondensation through a transesterification reaction by using a catalyst and using a dihydroxy compound and a carbonic acid diester as raw material monomers, and feeding the produced polycarbonate resin to an extruder, wherein the dihydroxy compound contains at least a dihydroxy compound having a moiety represented by formula (1) in a part of the structure, the dihydroxy compound having a moiety represented by formula (1) contains a compound having a cyclic ether structure, and the temperature at the time of feeding the polycarbonate resin to the extruder is from 180° C. to less than 250° C., with the proviso excluding the case where the moiety represented by formula (1) is a part of —CH2—O—H

description='In-line Formulae' end='lead'CH2—O  (1).description='In-line Formulae' end='tail'

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

  • MITSUBISHI CHEMICAL CORPORATION

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Nagao, Takehito Fukuoka, JP 3 13
Namiki, Shingo Fukuoka, JP 22 99
Yamamoto, Masanori Fukuoka, JP 79 1070
Yokogi, Masashi Fukuoka, JP 19 171

Cited Art Landscape

Load Citation

Patent Citation Ranking

Forward Cite Landscape

Load Citation

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
7.5 Year Payment $3600.00 $1800.00 $900.00 Nov 30, 2023
11.5 Year Payment $7400.00 $3700.00 $1850.00 Nov 30, 2027
Fee Large entity fee small entity fee micro entity fee
Surcharge - 7.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00