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US2721491A
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Impact means for power-operated pipe wrench
Assignee: Joy Manufacturing Co
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Filing: 1954-03-30
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Granted: 1955-10-25
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Expires: 1974-03-30
Abstract
No abstract record available.
Inventors
- 👤 William C Klitzke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:01
CPC Classifications
B; B21; B21J; B21J7/00; B21J7/20; B21J7/22; B21J7/24; E; E21; E21B; E21B19/00; E21B19/16; E21B19/167
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1464824A
Cited
US1775343A
Cited
US2492840A
Cited
US2470891A
Cited
GB658284A
Cited
US2501542A
Cited
GB662409A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-24 | 1959-04-25 | 1959-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-24 | 1963-04-25 | 1963-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-24 | 1967-04-25 | 1967-10-25 | $7700.00 | Window Closed / Lapsed |