US2929119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for making shell cores
Assignee: DEPENDABLE PATTERN WORKS Inc
•
Filing: 1957-06-07
•
Granted: 1960-03-22
•
Expires: 1977-06-07
Abstract
No abstract record available.
Inventors
- 👤 Ronald M Ronne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:40
CPC Classifications
B; B22; B22C; B22C23/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US363160A
Cited
US1316291A
Cited
US2733489A
Cited
US1063254A
Cited
US1968703A
Cited
US2829406A
Cited
US2852818A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |