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US 4,374,891 AGranted
Ultrathin polymer membranes
AssigneeGeneral Electric Company
InventorWilliam J. Ward, III
Life of this patent
Estimating the term…
Abstract
An ultrathin polyphenylene oxide/organopolysiloxane-polycarbonate copolymer film is described wherein the film contains from about 10 to about 35 percent by weight of the organopolysiloxane-polycarbonate copolymer.
Claims2
A film consisting of a blend of polyphenylene oxide and organopolysiloxane-polycarbonate copolymer exhibiting an oxygen/nitrogen separating factor having a value of at least 4.0, said film containing from about 10 to about 35% by weight of the total blend of organopolysiloxane-polycarbonate copolymer and having a thickness of less than about 200 A.
Dependencies are inferred from the claim text.