Patent · US Expired

Method for preparing vitamin A

US6384270B1 · kind B1 · utility

1Cited by
5References
33Claims
0Family size

Assignee

Inventors

Key dates

Filing dateApr 20, 2001
Grant dateMay 7, 2002
Priority date—
Expiry dateApr 20, 2021

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC07C2601/16
  • WIPO fieldOrganic fine chemistry
  • WIPO sectorChemistry

Abstract

The invention relates to a process for making vitamin A from ethynyl-retro-&agr;-ionol using an allene acetate as intermediate.

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