US2598554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a hollow mold of compacted mold forming material
Assignee: Herman Pneumatic Machine Co
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Filing: 1948-07-29
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Granted: 1952-05-27
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Expires: 1968-07-29
Abstract
No abstract record available.
Inventors
- 👤 Loyal L Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:28
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/22; B22C9/24; B22D; B22D13/00; B22D13/10; B22D13/101
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US896194A
Cited
US1474881A
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FR688270A
Cited
US2340262A
Cited
GB566339A
Cited
GB606534A
Cited
US2449900A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-27 | 1955-11-26 | 1956-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-27 | 1959-11-26 | 1960-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-27 | 1963-11-26 | 1964-05-27 | $7700.00 | Window Closed / Lapsed |