Priority date (The priority date 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 date listed.)
Publication of NL33631CpublicationCriticalpatent/NL33631C/xx
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
D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
D21H13/10—Organic non-cellulose fibres
D21H13/28—Organic non-cellulose fibres from natural polymers
D21H13/34—Protein fibres
D—TEXTILES; PAPER
D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
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
D21H5/00—Special paper or cardboard not otherwise provided for
D21H5/12—Special paper or cardboard not otherwise provided for characterised by the use of special fibrous materials
D21H5/1209—Special paper or cardboard not otherwise provided for characterised by the use of special fibrous materials of protein fibres