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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 6359103 B1

PDFFull Text
Date of Patent:
Mar. 19, 2002

Filed:

Aug. 17, 2000

Aromatic-aliphatic copolycarbonate and process for producing the same

Applicant:
Inventors:

Satoshi Nagai, Ibaraki, JP;

Osamu Kondo, Ibaraki, JP;

Kyohei Takakuwa, Ibaraki, JP;

Yoshinori Isahaya, Ibaraki, JP;

Takayasu Fujimori, Ibaraki, JP;

Assignee:

Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;

Attorney:

Sughrue Mion, PLLC

Primary Examiner:

Vasu Jagannathan

Assistant Examiner:

Callie E Shosho

Int. Cl.
CPC ...
C08G 6/416 ; C08G 6/420 ; C08G 6/430 ; C08G 6/438 ;
U.S. Cl.
CPC ...
C08G 6/416 ; C08G 6/420 ; C08G 6/430 ; C08G 6/438 ;
Abstract

An aromatic-aliphatic copolycarbonate and a process for producing the same which comprises polycondensation of an aromatic dihydroxy compound, such as 1,1-bis(4-hydroxyphenyl)cyclohexane, tricyclo(5.2.1.0 )decanedimethanol, and a carbonic acid diester in a molten state under heating, wherein the carbonic acid diester has a chlorine content of 20 ppm or lower. The copolycarbonate has improved refractive index, balance of dispersion, and photoelastic constant while retaining high impact resistance, high heat resistance, and excellent hue.

Find Patent Forward Citations

Nagai, Satoshi. (2002). Aromatic-aliphatic copolycarbonate and process for producing the same (U.S. Patent No. 6359103). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6359103

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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