Patent · US Expired

Solvent compositions

US6399562B2 · kind B2 · utility

2Cited by

4References

9Claims

0Family size

Assignee

Ausimont S.p.A. · IT

Inventors

Giampiero Basile · Alessandria, IT
Mario Visca · Alessandria, IT
Ezio Musso · Alessandria, IT

Key dates

Filing date	Feb 9, 2001
Grant date	Jun 4, 2002
Priority date	—
Expiry date	Feb 9, 2021

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC11D2111/22
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Azeotropic or near azeotropic solvent compositions, based on 1-difluoromethoxy-1,1,2,2-tetrafluoroethyl difluoromethyl ether, essentially consisting of (% by weight):I)1-difluoromethoxy15-991,1,2,2-tetrafluoroethyldifluromethyl ether(HCF2OCF2CF2OCF2H);isopentane85-1 II)1-difluromethoxy25-991,1,2,2-tetrafluroethyldifluoromethyl ether(HCF2OCF2CF2OCF2H);methyl-acetate75-1 III)1-difluoromethoxy35-991,1,2,2-tetrafluoroethyldifluoromethyl ether(HCF2OCF2CF2OCF2H);1-bromo-propane 65-1. 

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