Gas separation: apparatus – Electric field separation apparatus – Electrode retaining or supporting means
Patent
1973-05-25
1977-06-07
Hoffman, James R.
Gas separation: apparatus
Electric field separation apparatus
Electrode retaining or supporting means
96 85, 961145, 106135, 106238, G03C 138, G03C 133
Patent
active
RE0292559
ABSTRACT:
Acrylic polymer layers and colloidal silver halide photographic emulsions are coated to form layers without repellent spots from solutions containing a perfluoro compound [containing an intralinear carbonyl or sulfonyl group selected from the group: (1) perfluorocarbon compounds derived from perfluorocarboxylic acids having the general structure ##STR1## where C.sub.f is a fully fluorinated (perfluoro) saturated chain consisting of five or more carbon atoms which may or may not be an oxygen-interrupted carbon chain; X=OY or an amino group, where Y is H, alkali metal or an ammonium group, and (2) perfluoro compounds] derived from perfluorosulfonic and perfluorosulfuric acids having the general structure
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E. I. Du Pont de Nemours and Company
Hoffman James R.
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