Patent · US Expired

Separation of 3,3'4,4'- and 2,3,3',4'-tetramethyldiphenyl ether

US4937389A · kind A · utility

1Cited by
1References
17Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJun 28, 1988
Grant dateJun 26, 1990
Priority date—
Expiry dateJun 28, 2008

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC07C41/40
  • WIPO fieldOrganic fine chemistry
  • WIPO sectorChemistry

Abstract

A method of separating 3,3',4,4'-tetramethyldiphenyl ether from its solid mixture with 2,3,3',4'-tetramethyldiphenyl ether.

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