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US 5,205,903 AGranted
Production of honeycomb structure-extending dies
AssigneeNGK Insulators, Ltd.
InventorsKazuo Suzuki, Kenji Arai, Masayuki Matsuzaki
Life of this patent
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Abstract
A process for producing a honeycomb structure-extruding die by etching a surface of a base material for a honeycomb structure-extruding die with a gas, and coating the etched base material by CVD before an oxidized film is formed after the etching.
Claims7
A process for producing a honeycomb structure-extruding die, said process including the steps of:
- etching a surface of a base material for a honeycomb structure-extruding die with a gas;
- and
- coating the etched base material by CVD before an oxidized film is formed on the etched base material after the etching.
Dependencies are inferred from the claim text.