US3422206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for melting metal in an electric furnace
Assignee: Union Carbide Corp
•
Filing: 1965-04-07
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Granted: 1969-01-14
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Expires: 1985-04-07
Abstract
No abstract record available.
Inventors
- 👤 Allen J Baker
- 👤 Frank S Death
- 👤 Richard C Myers
- 👤 Walter B Farnsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:30
CPC Classifications
H; H05; H05B; H05B7/00; C; C21; C21B; C21B13/00; C21B13/12; C21B13/125; C22; C22B; C22B9/00; C22B9/16; C22B9/22; C22B9/226; Y; Y10; Y10S; Y10S65/00; Y10S65/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |