Patent classifications
D
TEXTILES; PAPER
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D21
PAPER-MAKING; PRODUCTION OF CELLULOSE
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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
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27/00
Special paper not otherwise provided for, e.g. made by multi-step processes
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D21H27/18
Paper- or board-based structures for surface covering
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D21H27/22
Structures being applied on the surface by special manufacturing processes, e.g. in presses
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D21H27/26
characterised by the overlay sheet or the top layers of the structures
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D21H27/28
treated to obtain specific resistance properties, e.g. against wear or weather
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