US2489459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallurgical furnace
Assignee: Metallurgical Processes Co
•
Filing: 1944-04-15
•
Granted: 1949-11-29
•
Expires: 1964-04-15
Abstract
No abstract record available.
Inventors
- 👤 Harold J Ness
- 👤 Charles E Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:30
CPC Classifications
C; C21; C21D; C21D9/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49332
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2025542A
Cited
US77210A
Cited
US709631A
Cited
US1112074A
Cited
US1343019A
Cited
US1516332A
Cited
GB344027A
Cited
US2030721A
Cited
US1816253A
Cited
US1934614A
Cited
US1960808A
Cited
US2081645A
Cited
US2049711A
Cited
US2101149A
Cited
US2221539A
Cited
US2243174A
Cited
US2240146A
Cited
US2205182A
Cited
US2303473A
Cited
US2254891A
Cited
US2327117A
Cited
US2394002A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |