US2449401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus selectively operable as a press or as a drop hammer
Assignee: HPM Development Corp
•
Filing: 1945-03-24
•
Granted: 1948-09-14
•
Expires: 1965-03-24
Abstract
No abstract record available.
Inventors
- 👤 Robert J Lindsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:54
CPC Classifications
B; B21; B21J; B21J9/00; B21J9/10; B21J9/12; B21J11/00; B21J7/00; B21J7/20; B21J7/36; B21J7/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US358713A
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US2392644A
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US959094A
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US1613563A
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US2067265A
Cited
US2300338A
Cited
US2346214A
Cited
US2411716A
Cited
US2316944A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-14 | 1952-03-15 | 1952-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-14 | 1956-03-15 | 1956-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-14 | 1960-03-15 | 1960-09-14 | $7700.00 | Window Closed / Lapsed |