US2520598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tilting type electric induction furnace
Assignee: Babcock and Wilcox Tube Co
•
Filing: 1947-05-08
•
Granted: 1950-08-29
•
Expires: 1967-05-08
Abstract
No abstract record available.
Inventors
- 👤 Jr Isaac Harter
- 👤 Sidley O Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:42
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/22; H05B6/24; Y; Y10; Y10S; Y10S266/00; Y10S266/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1783128A
Cited
US1456851A
Cited
USRE16054E
Cited
US1682388A
Cited
US1068643A
Cited
US1113134A
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US876946A
Cited
US1008406A
Cited
US1126079A
Cited
US1681950A
Cited
GB297311A
Cited
US1849476A
Cited
US1895421A
Cited
US1905204A
Cited
US2073597A
Cited
GB392764A
Cited
DE615418C
Cited
US1942550A
Cited
US1884637A
Cited
US1926573A
Cited
US1996623A
Cited
US2014349A
Cited
US2433495A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |