US2889386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arc melting
Assignee: WC Heraus GmbH and Co KG
•
Filing: 1956-03-16
•
Granted: 1959-06-02
•
Expires: 1976-03-16
Abstract
No abstract record available.
Inventors
- 👤 Gruber Helmut
- 👤 Scheidig Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:50
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/005; C; C22; C22B; C22B9/00; C22B9/16; C22B9/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1646221A
Cited
US1479836A
Cited
US1573095A
Cited
US1447236A
Cited
US2139160A
Cited
US2173446A
Cited
US2761002A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |