Patent US2983973A successfully refreshed from Google Patents.
US2983973A
Expired / Lapsed
US
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Methods and apparatus for melting and casting metals in a vacuum
Assignee: Individual
•
Filing: 1956-12-20
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Granted: 1961-05-16
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Expires: 1976-12-20
Abstract
No abstract record available.
Inventors
- 👤 Conrad A Parlanti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:00
CPC Classifications
B; B22; B22D; B22D18/00; B22D18/06; F; F27; F27B; F27B5/00; F27B5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1319500A
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CA481181A
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US2085450A
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US2133634A
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GB543577A
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US2392267A
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US2627014A
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US2625719A
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GB723699A
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GB732298A
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US2825945A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-15 | 1964-11-14 | 1965-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-15 | 1968-11-14 | 1969-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-15 | 1972-11-14 | 1973-05-16 | $7700.00 | Window Closed / Lapsed |