US2604072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic impact device
Assignee: BATES HARCUM J
•
Filing: 1949-04-05
•
Granted: 1952-07-22
•
Expires: 1969-04-05
Abstract
No abstract record available.
Inventors
- 👤 Donald E Beckett
- 👤 William N Beckett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:50
CPC Classifications
B; B25; B25D; B25D9/00; B25D9/06; B25D9/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US932992A
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US1839581A
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US803562A
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US942756A
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US910775A
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US1267698A
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US1656730A
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US1571044A
Cited
US1602901A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-22 | 1956-01-21 | 1956-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-22 | 1960-01-21 | 1960-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-22 | 1964-01-21 | 1964-07-22 | $7700.00 | Window Closed / Lapsed |