US2789325A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Core blowing apparatus
Assignee: DODGE STEEL Co
•
Filing: 1953-03-05
•
Granted: 1957-04-23
•
Expires: 1973-03-05
Abstract
No abstract record available.
Inventors
- 👤 Mckee Ruby Gibson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:53
CPC Classifications
B; B22; B22C; B22C15/00; B22C15/23; B22C15/24; B22C15/245
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US823530A
Cited
US915279A
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US893174A
Cited
US975887A
Cited
US2112910A
Cited
US2259768A
Cited
US2598621A
Cited
US2636230A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-22 | 1960-10-22 | 1961-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-22 | 1964-10-22 | 1965-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-22 | 1968-10-22 | 1969-04-23 | $7700.00 | Window Closed / Lapsed |