US2985931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming foundry molds
Assignee: Herman Pneumatic Machine Co
•
Filing: 1958-10-16
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Granted: 1961-05-30
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Expires: 1978-10-16
Abstract
No abstract record available.
Inventors
- 👤 Edgar L Frankenstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:32
CPC Classifications
B; B22; B22C; B22C11/00; B22C11/02; B22C17/00; B22C17/08; B22C17/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2599262A
Cited
CA523807A
Cited
US1832626A
Cited
FR1083239A
Cited
US2680270A
Cited
US2908950A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-29 | 1964-11-28 | 1965-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-29 | 1968-11-28 | 1969-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-29 | 1972-11-28 | 1973-05-30 | $7700.00 | Window Closed / Lapsed |