Stock material or miscellaneous articles – Structurally defined web or sheet – Nonplanar uniform thickness material
428184, 4285371, 4285375, 428541, 428921, 162109, 162123, 162141, 162156, 162159, 52796, B32B 328, D21H 1100
Non-inflammable light-weighing tough boards to be used for structural and decorative material in housing and building, such as, decorative ceiling boards, sliding door overlays, partitions and so on, prepared by corrugating cardboard made of phosphated wood pulp and inorganic fiber and processing the so obtained corrugated board by impregnating with a toughening solution of inorganic toughening agent and then drying it.
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patent: 3896763 (1975-07-01), Lau et al.
patent: 3958998 (1976-05-01), Atterbury
patent: 3972763 (1976-08-01), Wolvin et al.
patent: 4748066 (1988-05-01), Kelly et al.
K. S. Consult Service Co., Inc.
Loney Donald J.
Robinson Ellis P.
United Board Co., Ltd.
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