US2463979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making porous refractory alumina material
Assignee: Heany Industrial Ceramic Corp
•
Filing: 1945-03-26
•
Granted: 1949-03-08
•
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 04:01
CPC Classifications
C; C04; C04B; C04B38/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1350825A
Cited
US2369709A
Cited
AT43925B
Cited
US1027004A
Cited
US1050303A
Cited
US1107012A
Cited
US1802296A
Cited
US2059280A
Cited
US1942879A
Cited
US2030200A
Cited
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 |