The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 26, 1993
Filed:
Mar. 28, 1991
Applicant:
Inventors:
Philip L Bartlett, Wilmington, DE (US);
Donald B Bivens, Kennett Square, PA (US);
Brooks S Lunger, Coatesville, PA (US);
Akimichi Yokozeki, Greenville, DE (US);
Assignee:
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J / ; C09K / ; C09K / ; C11D / ;
U.S. Cl.
CPC ...
252 67 ; 62114 ; 203 67 ; 252162 ; 252170 ; 252171 ; 252305 ; 252364 ; 252D / ; 264 53 ; 264D / ; 521 98 ; 521131 ; 521910 ;
Abstract
The azeotropic and azeotrope-like compositions of 1,1,1,2-tetrafluoroethane and one of 1,1-difluoroethane, 1-chloro-1,1,-difluoroethane, dimethyl ether, perfluorocyclobutane, n-butane, isobutane and 1,1,1,2,3,3,3-heptafluoropropane, and their use as refrigerants, aerosol propellants and blowing agents for polymer foams are disclosed. The azeotropic and azeotrope-like compositions of 1,1,1,2-tetrafluoroethane and one of perfluorocyclobutane and 1,1,1,2,3,3,3-heptafluoropropane are also useful as fire extinguishants.