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US2429424A
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Power tong
Assignee: Phillips Petroleum Co
•
Filing: 1944-08-24
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Granted: 1947-10-21
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Expires: 1964-08-24
Abstract
No abstract record available.
Inventors
- 👤 Jesse S Montgomery
- 👤 Harold S Kelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:51
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1514195A
Cited
US1612226A
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US1860062A
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US2181641A
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US2263267A
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US2332685A
Cited
US2351887A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-20 | 1951-04-21 | 1951-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-20 | 1955-04-21 | 1955-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-20 | 1959-04-21 | 1959-10-21 | $7700.00 | Window Closed / Lapsed |