US2931082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Casting method and apparatus
Assignee: Individual
•
Filing: 1956-09-06
•
Granted: 1960-04-05
•
Expires: 1976-09-06
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Brennan
- 👤 Helen E Brennan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:23
CPC Classifications
B; B21; B21C; B21C23/00; B21C23/22; B21C23/24; B22; B22D; B22D11/00; B22D11/06; B22D11/0634; B22D11/0637; B22D11/068
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US359348A
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US441643A
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US560759A
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US2139215A
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US2169893A
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US2253421A
Cited
US2242350A
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US2383310A
Cited
US2371604A
Cited
DE881292C
Cited
US2714235A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |