Patent US2882570A successfully refreshed from Google Patents.
US2882570A
Expired / Lapsed
US
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Continuous vacuum casting
Assignee: Individual
•
Filing: 1956-05-22
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Granted: 1959-04-21
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Expires: 1976-05-22
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Brennan
- 👤 Helen E Brennan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:06
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/10; B22D11/11; B22D11/113
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1354286A
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US1667139A
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US1910008A
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US2252945A
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US2253421A
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US2191337A
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US2639490A
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US2587793A
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US2716790A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-20 | 1962-10-20 | 1963-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-20 | 1966-10-20 | 1967-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-20 | 1970-10-20 | 1971-04-21 | $7700.00 | Window Closed / Lapsed |