Gas separation: apparatus – Electric field separation apparatus – Electrode cleaner – apparatus part flusher – discharger – or...
Patent
1976-04-26
1977-12-27
Louie, Jr., Won H.
Gas separation: apparatus
Electric field separation apparatus
Electrode cleaner, apparatus part flusher, discharger, or...
96 90R, 96115P, 96 67, 96 86P, 96 85, 96 87R, G03C 524, G03C 152, G03C 168
Patent
active
040653153
ABSTRACT:
The free bases of various amino dyestuffs, such as the amino derivatives of triarylmethane and xanthene dyestuffs form stable solutions with organic halides and a matrix, such as a film-forming binder. Dry films of such compositions are lightly colored; upon exposure to actinic light, the dyestuffs become intensely colored. The combination of dyestuff free base and organic halide is particularly useful in conjunction with photopolymerizable compositions to denote the polymerized portions of a dry film photoresist and to enable the use of thicker films or coatings of liquid photopolymerizable compositions than were previously useful.
REFERENCES:
patent: 3102029 (1963-08-01), Fichter et al.
patent: 3342603 (1967-09-01), Sprague et al.
patent: 3361563 (1968-01-01), Hackmann et al.
patent: 3370026 (1968-02-01), Patella et al.
patent: 3443945 (1969-05-01), Fichter
patent: 3712817 (1973-01-01), Hazy
patent: 3899338 (1975-08-01), Lewis
patent: 3926643 (1975-12-01), Chang
Cook Harriet J.
Lipson Melvin A.
Yamazaki Toshio
Dynachem Corporation
Louie, Jr. Won H.
Marcus Stanley A.
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