US2476423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory block furnace enclosure structure with oxidizable metal reinforcing means
Assignee: Individual
•
Filing: 1944-02-14
•
Granted: 1949-07-19
•
Expires: 1964-02-14
Abstract
No abstract record available.
Inventors
- 👤 Levi S Longenecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:01
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/04; F27D1/06; F27D1/08; F27D1/02; F27D1/021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1590303A
Cited
US1750355A
Cited
US1612412A
Cited
US2163435A
Cited
US2120133A
Cited
US2155165A
Cited
US2304170A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-18 | 1953-01-17 | 1953-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-18 | 1957-01-17 | 1957-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-18 | 1961-01-17 | 1961-07-19 | $7700.00 | Window Closed / Lapsed |