Patent · US Active

Modified copolyesters and optical films including modified copolyesters

US7468204B2 · kind B2 · utility

2Cited by

37References

21Claims

0Family size

Assignee

3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

Timothy J. Hebrink · Scandia, US
Martin E. Denker · Vadnais Heights, US
Bert T. Chien · Okabena, US
Matthew B. Johnson · Norman, US
Richard J. Thompson · Ipswich, GB
Kristopher J. Derks · Woodbury, US
William W. Merrill · White Bear Lake, US
Fuming B. Li · Woodbury, US

Key dates

Filing date	Feb 25, 2008
Grant date	Dec 23, 2008
Priority date	—
Expiry date	Feb 25, 2028

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31786
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Modified copolyesters having relatively low refractive indices and relatively high glass transition temperatures are disclosed. These modified copolyesters can be used in forming one or more layers in an optical film, such as a multilayer polymer film.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.