US3014255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of operating vacuum induction furnace
Assignee: WC Heraus GmbH and Co KG
•
Filing: 1957-11-15
•
Granted: 1961-12-26
•
Expires: 1977-11-15
Abstract
No abstract record available.
Inventors
- 👤 Adrien H Bussard
- 👤 Muller Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:35
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/10; C22; C22B; C22B4/00
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-25 | 1965-06-26 | 1965-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-25 | 1969-06-26 | 1969-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-25 | 1973-06-26 | 1973-12-26 | $7700.00 | Window Closed / Lapsed |