Patent GB370899A successfully refreshed from Google Patents.
US2571242A
Expired / Lapsed
US
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Opal glass and method of controlling fire thereof
Assignee: Corning Glass Works
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Filing: 1948-07-21
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Granted: 1951-10-16
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Expires: 1968-07-21
Abstract
No abstract record available.
Inventors
- 👤 Harrison P Hood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:13
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/11; C03C3/112; C03C3/115; C03C3/118; C03C4/00; C03C4/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
AN OTHERWISE NORMALLY FIERY, OXIDIZED ALKALLINE SILICATE FLUORIDE OPAL GLASS CONTAINING 0.01% TO 0.1% CUO, WHEREBY THE FIERY APPEARANCE IS ELIMINATED.
Claim 2
Dependent Claim
21 words
AN OTHERWISE NORMALLY FIERY, OXIDIZED ALKALLINE SILICATE FLUORIDE OPAL GLASS CONTAINING 0.01% TO 0.1% CUO, WHEREBY THE FIERY APPEARANCE IS ELIMINATED.
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) | 1954-10-15 | 1955-04-16 | 1955-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-15 | 1959-04-16 | 1959-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-15 | 1963-04-16 | 1963-10-16 | $7700.00 | Window Closed / Lapsed |