Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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
D21H17/63—Inorganic compounds
D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
ARNOULD, E. Manufacture of blotting papers. Papier 25: 449-450 (Oct., 1922); Paper Trade J. 75, no. 25: 59 (Dec. 21, 1922). BEADLE, C., and STEVENS, HP Blotting paper (testing). Paper Mill 29, no. 6: 104 (Feb. 10, 1906).
BLOTTING paper making. Paper Making 29, no. 11: 422, 424 (Nov., 1910); Paper Mill 33, no. 37: 25 (Sept. 10, 1910). BLOTTING paper manufacture. Paper Maker 50, no. 5: 511 (Nov., 1915). BLOTTING paper: Some notes. Paper Making 44, no. 2, suppl. iii-iv (Feb.