US2748007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass refractory composition
Assignee: Libbey Owens Ford Glass Co
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Filing: 1951-09-12
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Granted: 1956-05-29
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Expires: 1971-09-12
Abstract
No abstract record available.
Inventors
- 👤 Alfred E Badger
- 👤 Donald E Sharp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:52
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/66; C04B35/01; C04B35/16; C04B35/18; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3217; C04B2235/3231; C04B2235/3241; C04B2235/34; C04B2235/3418; C04B2235/349
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
A GLASS CONTACT REFRACTORY CONSISTING ESSENTIALLY OF FROM 30 TO 45% ALUMINUM OXIDE, 50 TO 70% SILICON OXIDE, AND FROM 1 TO 5% OF AN OXIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF CHROMIUM AND VANAIUM.
Claim 2
Dependent Claim
38 words
A GLASS CONTACT REFRACTORY CONSISTING ESSENTIALLY OF FROM 30 TO 45% ALUMINUM OXIDE, 50 TO 70% SILICON OXIDE, AND FROM 1 TO 5% OF AN OXIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF CHROMIUM AND VANAIUM.
References Cited (Backward Citations)
US2311228A
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US2369709A
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US2482580A
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FR377964A
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US2207558A
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US2261400A
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US2332014A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |