US 4,035,258 AGranted

Azeotropic compositions

AssigneePhillips Petroleum Company

InventorRobert E. Reusser

Life of this patent

Estimating the term…

Abstract

This invention relates to azeotropic compositions of 1,2-dichloro-1-fluoroethane or of 1,2-dichloro-1,2-difluoroethane with certain alcohols, ethers, or ketones.

Claims2

Dependent claims

The azeotrope which at substantially atmospheric pressure is characterized as about 81.2 weight per cent 1,2-dichloro-1-fluoroethane and about 18.8 weight percent ethanol.

Dependencies are inferred from the claim text.

Facts

Application: 05/609,115Filed 29 Aug 1975 · division
Priority: 4 Feb 1972
Granted: 12 Jul 1977
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

C23G 5/02832
Ethanes: c2h3cl2f
C11D 7/5081
Mixtures of only oxygen-containing solvents: the oxygen-containing solvents being alcohols only
C11D 7/5086
Mixtures of only oxygen-containing solvents: the oxygen-containing solvents being different from alcohols, e.g. mixtures of water and ethers
C23G 5/02835
Ethanes: c2h2cl2f2

Family

Serial223,779Parent of this continuation-in-part · filed 4 Feb 1972
Serial391,663Parent of this division · filed 27 Aug 1973
US 3,936,387 AParent of this division
US 4,035,258 AThis patent

From the US filing history. Foreign family members aren’t listed.

Timeline

Citations

Open elsewhere

patentgrep

Loading patent…