Patent US2711568A successfully refreshed from Google Patents.
US2711568A
Expired / Lapsed
US
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Permanent mold apparatus for casting hollow articles
Assignee: Bohn Aluminum and Brass Corp
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Filing: 1951-09-07
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Granted: 1955-06-28
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Expires: 1971-09-07
Abstract
No abstract record available.
Inventors
- 👤 Frederick B Palmer
- 👤 Dale A Brown
- 👤 Lester L Pond
- 👤 William R Hinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:57
CPC Classifications
B; B22; B22D; B22D15/00; B22D15/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US666075A
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US2070649A
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US2204407A
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US2363759A
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US2527537A
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US2567649A
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US2532256A
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US2588898A
Cited
US2581418A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-06-27 | 1958-12-27 | 1959-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-27 | 1962-12-27 | 1963-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-27 | 1966-12-27 | 1967-06-28 | $7700.00 | Window Closed / Lapsed |