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Class Information
Number: 501/67
Name: Compositions: ceramic > Ceramic compositions > Glass compositions, compositions containing glass other than those wherein glass is a bonding agent, or glass batch forming compositions > Silica containing > 40 percent - 90 percent by weight silica > And boron > And aluminum > And zinc or zirconium
Description: Compositions additionally containing zinc or zirconium or a compound of either of these elements.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 4012131 |
High strength ophthalmic lens |
Mar. 15, 1977 |
| 4001741 |
Low working temperature reed glasses |
Jan. 4, 1977 |
| 4001019 |
Reversible light sensitive glass |
Jan. 4, 1977 |
| 3998647 |
Reversible light-sensitive glass |
Dec. 21, 1976 |
| 3998617 |
Method of improving the mechanical strength of glass |
Dec. 21, 1976 |
| 3988514 |
Catalytic material |
Oct. 26, 1976 |
| 3984252 |
Fireproof glass windowpanes |
Oct. 5, 1976 |
| 3968412 |
Thick film capacitor |
Jul. 6, 1976 |
| 3957499 |
Fast-fading index-corrected photochromic glass compositions |
May. 18, 1976 |
| 3954487 |
Chemically hardened spectacle crown glass |
May. 4, 1976 |
| 3954485 |
Silver-free polarizing photochromic glasses |
May. 4, 1976 |
| 3951671 |
Ophthalmic glass compositions |
Apr. 20, 1976 |
| 3941605 |
Reversible light-sensitive glass |
Mar. 2, 1976 |
| 3940277 |
Glass-ceramics containing fibers exhibiting thermoplastic properties |
Feb. 24, 1976 |
| 3939295 |
Protective coatings and frits therefor |
Feb. 17, 1976 |
| 3932312 |
Constant temperature coefficient thick film thermistor |
Jan. 13, 1976 |
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