Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Physical dimension specified
Patent
1990-03-15
1990-12-18
Foelak, Morton
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Physical dimension specified
428334, 4284735, 528188, 528229, 528353, B29C 4112
Patent
active
049785737
ABSTRACT:
Disclosed herein are free-standing, pinhole-free, ultrathin polyimide films having thickness of about 400 angstroms or less and a process to prepare them. The films find particular utility in separatory applications.
REFERENCES:
patent: 4880699 (1989-11-01), Kohn
Foelak Morton
Hoechst Celanese Corp.
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