Plastic and nonmetallic article shaping or treating: processes – Carbonizing to form article – With carbonizing – then adding carbonizable material and...
Patent
1977-12-21
1980-10-21
Arnold, Donald J.
Plastic and nonmetallic article shaping or treating: processes
Carbonizing to form article
With carbonizing, then adding carbonizable material and...
106 56, 106 67, 264 296, 264 297, 264 65, 264 66, C04B 3556
Patent
active
042293910
ABSTRACT:
The present invention relates to a process for the production of colored, fired, shaped clay products which comprises firing shaped, dried clay objects in a kiln, effecting carbon deposition on and into the resulting fired clay objects by heat treating the said fired objects in a carburizing atmosphere to produce a colored, fired, shaped clay product and thereafter cooling said colored product in an atmosphere of nitrogen.
REFERENCES:
patent: 2929126 (1960-03-01), Bollack et al.
patent: 3330333 (1967-07-01), Metz
patent: 3462522 (1969-08-01), Clark et al.
patent: 3487136 (1969-12-01), Bonner et al.
patent: 4004934 (1977-01-01), Prochazka
patent: 4069060 (1978-01-01), Hayashi et al.
patent: 4093688 (1978-06-01), Withop et al.
Arnold Donald J.
Ravenhead Brick Company Limited
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