US2559805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Opal glass composition
Assignee: Corning Glass Works
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Filing: 1947-07-03
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Granted: 1951-07-10
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Expires: 1967-07-03
Abstract
No abstract record available.
Inventors
- 👤 Stookey Stanley Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:35
CPC Classifications
C; C03; C03C; C03C4/00; C03C2204/00; C03C2204/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
123 words
A LIGHT-DIFFUSING GLASS COMPRISING 50% TO 70% SIO2, 7% TO 15% ALKALI METAL OXIDE, 5% TO 25% BAO, 2% TO 10% P2O5, AND THE INDICATED AMOUNT OF AT LEAST ONE OXIDE SELECTED FROM THE GROUP CONSISTING OF UP TO 25% B2O3 AND UP TO 10% AL2O3, THE TOTAL B2O3 AND AL2O3 BEING NOT OVER 25%, THE TOTAL BAO AND P2O5 BEING FROM 9% TO 30%, THE RATIO BAO/P2O5 BEING FROM 1.5/1 TO 4/1, THE RATIO ALKALI METAL OXIDE/P2O5 BEING FROM 1.1/1 TO 4/1, AND THE RATIO ALKALI METAL OXIDE/BAO+P2O5 BEING FROM 0.3/1 TO 1.1/1, THE GLASS CONTAINING LIGHT-DIFFUSING PARTICLES OF AN INSOLUBLE PHOSPHATE CONSISTING OF BARIUM PHOSPHATE AND BEING SUBSTANTIALLY FREE FROM COMPOUNDS OF METALS OF THE SECOND PERIODIC GROUP OTHER THAN BARIUM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-09 | 1955-01-08 | 1955-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-09 | 1959-01-08 | 1959-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-09 | 1963-01-08 | 1963-07-10 | $7700.00 | Window Closed / Lapsed |