US2457196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Core making machine
Assignee: Geo D Roper Corp
•
Filing: 1944-04-21
•
Granted: 1948-12-28
•
Expires: 1964-04-21
Abstract
No abstract record available.
Inventors
- 👤 Royal D Baysinger
- 👤 Lyle W Fulton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:13
CPC Classifications
B; B22; B22C; B22C13/00; B22C13/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1726024A
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US2122022A
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US754495A
Cited
US821791A
Cited
US967565A
Cited
GB191305570A
Cited
GB178492A
Cited
US1910354A
Cited
US2350253A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-28 | 1952-06-28 | 1952-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-28 | 1956-06-28 | 1956-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-28 | 1960-06-28 | 1960-12-28 | $7700.00 | Window Closed / Lapsed |