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Patent US2463979A successfully refreshed from Google Patents.
US2463979A
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Process of making porous refractory alumina material
Assignee: Heany Industrial Ceramic Corp
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Filing: 1945-03-26
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Granted: 1949-03-08
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Expires: 1965-03-26
Abstract
No abstract record available.
Inventors
- 👤 Langrod Kasimir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:45
CPC Classifications
C; C04; C04B; C04B38/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2369709A
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US1027004A
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US1050303A
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US1107012A
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US1802296A
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US1942879A
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US2030200A
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US2043029A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-07 | 1952-09-06 | 1953-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-07 | 1956-09-06 | 1957-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-07 | 1960-09-06 | 1961-03-08 | $7700.00 | Window Closed / Lapsed |