Compositions: Ceramic Patents (Class 501)
- Devitrified glass-ceramics (Class 501/2)
- Glass compositions, compositions containing glass other than those wherein glass is a bonding agent, or glass batch forming compositions (Class 501/11)
- Pore-forming (Class 501/80)
- Synthetic precious stones (e.g., single crystals, etc.) (Class 501/86)
- Carbide or oxycarbide containing (Class 501/87)
- Refractory (Class 501/94)
- Titanate, zirconate, stannate, niobate, or tantalate or oxide of titanium, zirconium, tin, niobium, or tantalum containing (e.g., dielectrics, etc.) (Class 501/134)
- Elemental sulfur containing (Class 501/140)
- Clay containing (e.g., porcelain, earthenware, etc.) (Class 501/141)
- Fluorine containing (Class 501/151)
- Yttrium, lanthanide, actinide, or transactinide containing (i.e., atomic numbers 39 or 57-71 or 89+) (Class 501/152)
- Aluminum compound containing (Class 501/153)
- Silicon compound containing (Class 501/154)
- Composed of waste material (Class 501/155)
Cross-Reference Art Collections
- Having R.I. at least 1.8 (Class 501/901)
- Having Abbe number at least 70 (Class 501/902)
- Having refractive index less than 1.8 and Abbe number less than 70 (Class 501/903)
- Infrared transmitting or absorbing (Class 501/904)
- Ultraviolet transmitting or absorbing (Class 501/905)
- Thorium oxide containing (Class 501/906)
