US3019274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-cooled crucible for vacuum arc furnaces
Assignee: WC Heraus GmbH and Co KG
•
Filing: 1958-06-06
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Granted: 1962-01-30
•
Expires: 1978-06-06
Abstract
No abstract record available.
Inventors
- 👤 Gruber Helmut
- 👤 Scheidig Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:34
CPC Classifications
F; F27; F27B; F27B5/00; F27B5/04; H; H05; H05B; H05B7/00; H05B7/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2243096A
Cited
US2625719A
Cited
US2662104A
Cited
US2727937A
Cited
US2761002A
Cited
US2727936A
Cited
US2857445A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-29 | 1965-07-31 | 1966-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-29 | 1969-07-31 | 1970-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-29 | 1973-07-31 | 1974-01-30 | $7700.00 | Window Closed / Lapsed |