Patent US2567039A successfully refreshed from Google Patents.
US2567039A
Expired / Lapsed
US
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Tong assembly
Assignee: Standard Oil Development Co
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Filing: 1947-05-17
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Granted: 1951-09-04
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Expires: 1967-05-17
Abstract
No abstract record available.
Inventors
- 👤 Albert L Stone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:54
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/16; Y; Y10; Y10T; Y10T279/00; Y10T279/12; Y10T279/1274; Y10T279/1283; Y10T279/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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 |