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Class Information
Number: 501/130
Name: Compositions: ceramic > Ceramic compositions > Refractory > Trivalent metal compound (e.g., iron oxide, chromium oxide, trivalent rare earth oxide, etc.) containing > Aluminum compound (e.g., clay, aluminium oxide, etc.) > And silicon compound other than clay > And clay containing
Description: Subject matter comprising clay.

Sub-classes under this class:

Class Number Class Name Patents
501/131 Less than 40 percent by weight clay 38

Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
4104075 Refractories, batch for making the same and method for making the same Aug. 1, 1978
4072531 Plugging compositions for blast furnace tap holes Feb. 7, 1978
3941872 Method for producing calcined clay pigments Mar. 2, 1976

1 2

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