Patent · US Expired

Hydrofluoropolyether-based azeotropic or near azeotropic compositions

US6255273A · kind A · utility

3Cited by

0References

20Claims

0Family size

Assignee

Ausimont S.p.A. · IT

Inventors

Ezio Musso · Alessandria, IT
Giampiero Basile · Alessandria, IT
Sauro Girolomoni · Spinetta Marengo, IT

Key dates

Filing date	Aug 16, 1999
Grant date	Jul 3, 2001
Priority date	—
Expiry date	Aug 16, 2019

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC11D2111/22
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Azeotropic or near azeotropic compositions based on difluoromethoxy-bis(difluoromethyl ether) and/or 1-difluoromethoxy-1,1,2,2-tetrafluoroethyl difluoromethyl ether.

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