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Hans Wilski, Hermann Schmidt: Package for dry-resist material. Hoechst Aktiengesellschaft, Foley & Lardner Schwartz Jeffery Schwaab Mack Blumenthal & Evans, August 1, 1989: US04852732 (27 worldwide citation)

A package for photoresist material, particularly a dry resist, is substantially impermeable to water vapor, thereby preventing humidity-related effects which adversely influence the processability of the photoresist. The package can comprise a film tubing, the ends of which are closed by welding or ...


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Hans Wilski, Werner Interthal, Friedrich Engelhardt: Drag reducing agents. Hoechst Aktiengesellschaft, Connolly and Hutz, October 4, 1983: US04407321 (7 worldwide citation)

Process for reducing the friction pressure drop of aqueous liquids and suspensions in turbulent or pulsating flow by adding from 1 to 1,000 ppm of linear random copolymers of the following formula I as drag reducing agents ##STR1## in which X is a Na.sup.+, K.sup.+ or NH.sub.4.sup.+ cation and Y is ...


3
Hans Wilski, Werner Interthal, Gunter Gruber, Gerhard Slebos: Process using polyacrylamide drag reducing agent in the form of an aqueous jelly. Hoechst Aktiengesellschaft, Connolly and Hutz, April 28, 1981: US04263927 (4 worldwide citation)

The frictional drag of aqueous liquids and suspensions in turbulent or pulsating flow is reduced by adding 1 to 1,000 ppm of a polyacryl amide or partially saponified polyacryl amide obtained in its manufacturing process in the form of an aqueous, dimensionally stable jelly which has retained its so ...


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