US2937217A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric furnace
Assignee: Westinghouse Electric Corp
•
Filing: 1957-11-29
•
Granted: 1960-05-17
•
Expires: 1977-11-29
Abstract
No abstract record available.
Inventors
- 👤 Robert M Baker
- 👤 Carl P Bernhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:20
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/22; H05B6/24; H05B6/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-17 | 1963-11-16 | 1964-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-17 | 1967-11-16 | 1968-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-17 | 1971-11-16 | 1972-05-17 | $7700.00 | Window Closed / Lapsed |