Patent US2927142A successfully refreshed from Google Patents.
US2927142A
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US
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Combined electric arc and hydrocarbon fuel heated metal melting furnace and method of melting therewith
Assignee: RITETHERM Inc
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Filing: 1957-10-30
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Granted: 1960-03-01
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Expires: 1977-10-30
Abstract
No abstract record available.
Inventors
- 👤 Bate Michael D La
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:41
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/52; C21C5/5211; C21C5/5217; C22; C22B; C22B4/00; Y; Y02; Y02P; Y02P10/00; Y02P10/20
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) | 1963-03-01 | 1963-08-31 | 1964-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-01 | 1967-08-31 | 1968-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-01 | 1971-08-31 | 1972-03-01 | $7700.00 | Window Closed / Lapsed |