US3154404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for heating molten metals in a vacuum chamber
Assignee: WC Heraus GmbH and Co KG
•
Filing: 1961-01-10
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Granted: 1964-10-27
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Expires: 1981-01-10
Abstract
No abstract record available.
Inventors
- 👤 Lorenz Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:05
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US428552A
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US1277523A
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US1921060A
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US2587793A
Cited
US2788270A
Cited
US2893715A
Cited
US2893860A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |