US3056847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum melting induction furnace
Assignee: Otto Junker GmbH
•
Filing: 1959-04-08
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Granted: 1962-10-02
•
Expires: 1979-04-08
Abstract
No abstract record available.
Inventors
- 👤 Junker Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:58
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/22; H05B6/24; H05B6/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1328336A
Cited
US1782359A
Cited
US1810820A
Cited
US1931607A
Cited
US1823908A
Cited
GB439590A
Cited
US2400660A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-01 | 1966-04-02 | 1966-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-01 | 1970-04-02 | 1970-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-01 | 1974-04-02 | 1974-10-02 | $7700.00 | Window Closed / Lapsed |