US3480264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallurgical walking beam furnace
Assignee: Koppers Wistra Ofenbau GmbH
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Filing: 1968-01-25
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Granted: 1969-11-25
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Expires: 1988-01-25
Abstract
No abstract record available.
Inventors
- 👤 Wilhelm Krause
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:28
CPC Classifications
F; F27; F27B; F27B9/00; F27B9/14; F27B9/20; F27B9/201
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) | 1972-11-24 | 1973-05-26 | 1973-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-24 | 1977-05-26 | 1977-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-24 | 1981-05-26 | 1981-11-25 | $7700.00 | Window Closed / Lapsed |