US2491588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion die
Assignee: Hercules Powder Co
•
Filing: 1945-04-19
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Granted: 1949-12-20
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Expires: 1965-04-19
Abstract
No abstract record available.
Inventors
- 👤 Sr James F Shively
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:29
CPC Classifications
C; C06; C06B; C06B21/00; C06B21/0033; C06B21/0075; B; B30; B30B; B30B11/00; B30B11/22; B30B11/221
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-19 | 1953-06-20 | 1953-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-19 | 1957-06-20 | 1957-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-19 | 1961-06-20 | 1961-12-20 | $7700.00 | Window Closed / Lapsed |