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Application filed by Albert Dr SommerfiledCriticalAlbert Dr Sommer
Publication of CH141289ApublicationCriticalpatent/CH141289A/de
D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
D21H17/61—Bitumen
CH141289D1925-11-101929-08-07Verfahren zur Herstellung von bituminöser Pappe.
CH141289A
(de)