US2892005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal melting furnace
Assignee: Lindberg Engineering Co
•
Filing: 1955-11-14
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Granted: 1959-06-23
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Expires: 1975-11-14
Abstract
No abstract record available.
Inventors
- 👤 Karl A Lang
- 👤 Cary H Stevenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:13
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/16; H05B6/20; Y; Y10; Y10S; Y10S266/00; Y10S266/90
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) | 1962-06-22 | 1962-12-22 | 1963-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-22 | 1966-12-22 | 1967-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-22 | 1970-12-22 | 1971-06-23 | $7700.00 | Window Closed / Lapsed |