Patent · US Expired

Colorings

US4000118A · kind A · utility

11Cited by
11References
11Claims
0Family size

Inventors

Key dates

Filing dateFeb 11, 1975
Grant dateDec 28, 1976
Priority date—
Expiry dateFeb 11, 1995

Classification

  • Technology area (CPC Y)Emerging Cross-Sectional Technologies
  • CPC primaryY10S534/03
  • WIPO fieldFood chemistry
  • WIPO sectorChemistry

Abstract

Nontoxic coloring compositions which comprise optically chromophoric groups attached via sulfonamido linkages to nondegradable chemical molecules having molecular dimensions which substantially prevent their absorption from the gastrointestinal tract are disclosed. The colorings find primary applications as food colors.

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