|
| US4130157 | 19 juil. 1976 | 19 déc. 1978 | Westinghouse Electric Corp. | Silicon nitride (SI.sub.3 N.sub.4) leachable ceramic cores |
| US4162173 | 19 sept. 1977 | 24 juil. 1979 | General Electric Company | Molten salt leach for removal of inorganic cores from directionally solidified eutectic alloy structures |
| US7575039 | 15 oct. 2003 | 18 août 2009 | United Technologies Corporation | Refractory metal core coatings |
