Patent · US Active

Retardation film

US8846180B2 · kind B2 · utility

0Cited by
1References
12Claims
0Family size

Assignee

Inventors

Key dates

Filing dateNov 6, 2009
Grant dateSep 30, 2014
Priority date
Expiry dateJan 24, 2032

Classification

  • Technology area (CPC Y)Emerging Cross-Sectional Technologies
  • CPC primaryY10T428/24479
  • WIPO fieldOther special machines
  • WIPO sectorMechanical engineering

Abstract

A retardation film which has few foreign matter defects and small retardation nonuniformity and meets the required quality of a retardation film is provided with high productivity at a low cost by melt extruding a polycarbonate.The retardation film obtained by stretching and orienting a melt extruded film of a polycarbonate is characterized in that:

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