US1740818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-fluid hammer
Assignee: Individual
•
Filing: 1926-09-04
•
Granted: 1929-12-24
•
Expires: 1946-09-04
Abstract
No abstract record available.
Inventors
- 👤 Killingsworth Virgil Skeen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:02
CPC Classifications
B; B25; B25D; B25D17/00; B25D17/24; B21; B21J; B21J7/00; B21J7/20; B21J7/22; B21J7/24; B25D9/00; B25D2250/00; B25D2250/005; B25D2250/371
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1932-12-23 | 1933-06-24 | 1933-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-12-23 | 1937-06-24 | 1937-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-12-23 | 1941-06-24 | 1941-12-24 | $7700.00 | Window Closed / Lapsed |