US3077414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of sulphate opal glasses
Assignee: Corning Glass Works
•
Filing: 1959-11-02
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Granted: 1963-02-12
•
Expires: 1979-11-02
Abstract
No abstract record available.
Inventors
- 👤 Richard M Wiker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:59
CPC Classifications
C; C03; C03C; C03C4/00; C03C2204/00; C03C2204/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
IN THE PRODUCTION OF A SULPHATE OPAL GLASS BY MELTING A GLASS BATCH ADAPTED TO PRODUCE AN ALAKI SILICATE GLASS COMPOSED ESSENTIALLY OF 55-75% SIO2, 5-20% OF AT LEAST ONE ALKALI METAL OXIDE, AT LEAST ONE DIVALENT METAL OXIDE IN AN AMOUNT NOT EXCEEDING 15%, 0-15% AL2O3 AND CONTAINING A SUFFICIENT AMOUNT OF SULPHATE ION TO PROVIDE A SEPARATE SULPHATE OPAL PHASE IN THE GLASS MELT, AN IMPROVED METHOD OF CONTROLLING OPAL DENSITY WHICH COMPRISES THE STEPS OF INTRODUCING INTO THE GLASS BATCH, IN VITRIFIABLE AMOUNT, A SOURCE OF ARSENIC OXIDE CAPABLE OF PROVIDING 0.7-2.0% ARSENIC OXIDE IN THE GLASS MELT, AND MELTING THE BATCH AT TEMPERATURES NOT EXCEEDING 1500*C.
Claim 2
Dependent Claim
110 words
IN THE PRODUCTION OF A SULPHATE OPAL GLASS BY MELTING A GLASS BATCH ADAPTED TO PRODUCE AN ALAKI SILICATE GLASS COMPOSED ESSENTIALLY OF 55-75% SIO2, 5-20% OF AT LEAST ONE ALKALI METAL OXIDE, AT LEAST ONE DIVALENT METAL OXIDE IN AN AMOUNT NOT EXCEEDING 15%, 0-15% AL2O3 AND CONTAINING A SUFFICIENT AMOUNT OF SULPHATE ION TO PROVIDE A SEPARATE SULPHATE OPAL PHASE IN THE GLASS MELT, AN IMPROVED METHOD OF CONTROLLING OPAL DENSITY WHICH COMPRISES THE STEPS OF INTRODUCING INTO THE GLASS BATCH, IN VITRIFIABLE AMOUNT, A SOURCE OF ARSENIC OXIDE CAPABLE OF PROVIDING 0.7-2.0% ARSENIC OXIDE IN THE GLASS MELT, AND MELTING THE BATCH AT TEMPERATURES NOT EXCEEDING 1500*C.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-11 | 1966-08-13 | 1967-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-11 | 1970-08-13 | 1971-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-11 | 1974-08-13 | 1975-02-12 | $7700.00 | Window Closed / Lapsed |