US2566561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screwing and unscrewing tongs, particularly for drilling pipe joints
Assignee: Individual
•
Filing: 1947-01-31
•
Granted: 1951-09-04
•
Expires: 1967-01-31
Abstract
No abstract record available.
Inventors
- 👤 Edelberg Vladimir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:53
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/16; E21B19/161; E21B19/164; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53687
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1185962A
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US1401405A
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US1600477A
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US2181641A
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US2263267A
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US2317306A
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US2332685A
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US2453369A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-03 | 1955-03-05 | 1955-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-03 | 1959-03-05 | 1959-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-03 | 1963-03-05 | 1963-09-04 | $7700.00 | Window Closed / Lapsed |