Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Physical dimension specified
Patent
1988-01-29
1990-02-13
Lieberman, Allan M.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Physical dimension specified
264 41, 264298, 428220, 524 32, B01D 1300, B29C 4112
Patent
active
049006215
ABSTRACT:
Disclosed herein are free-standing, pinhole-free, ultrathin, blended, cellulose nitrate films having thicknesses of about 400 angstroms or less and a process to prepare them. The films find particular utility in separatory applications.
REFERENCES:
patent: 3892665 (1975-07-01), Steigelmann et al.
patent: 4155793 (1979-05-01), Salemme et al.
patent: 4279855 (1981-07-01), Ward, III
Hoechst Celanese Corporation
Lieberman Allan M.
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