US2933785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and devices for the production of blanks, cores, and moulds for casting purposes
Assignee: Individual
•
Filing: 1957-03-20
•
Granted: 1960-04-26
•
Expires: 1977-03-20
Abstract
No abstract record available.
Inventors
- 👤 Hansberg Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:54
CPC Classifications
B; B22; B22C; B22C15/00; B22C15/23; B22C23/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1320770A
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US1030326A
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US2416506A
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US2478116A
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US2598621A
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US2563643A
Cited
US2759229A
Cited
US2792601A
Cited
US2761186A
Cited
US2757424A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |