Alpha Al2O3 and Ti2O3 protective coatings on aluminide substrates Grant US-6933053-B2 United States of America 23 Aug 2005
Process for forming nitride protective coatings Grant US-5599404-A United States of America 04 Feb 1997
Oxidation resistant superalloys containing low sulfur levels Application US-4895201-A United States of America 23 Jan 1990
Oxidation and corrosion resistant chromia forming coatings Application US-4826738-A United States of America 02 May 1989