US2667930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Casing scraper
Assignee: Baker Hughes Oilfield Operations LLC
•
Filing: 1948-04-06
•
Granted: 1954-02-02
•
Expires: 1968-04-06
Abstract
No abstract record available.
Inventors
- 👤 Dean F Saurenman
- 👤 Paul E Hilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:25
CPC Classifications
E; E21; E21B; E21B37/00; E21B37/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1809975A
Cited
US2210824A
Cited
US2326528A
Cited
US2295058A
Cited
US2275030A
Cited
US2472749A
Cited
US2424027A
Cited
US2464390A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-01 | 1957-08-03 | 1958-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-01 | 1961-08-03 | 1962-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-01 | 1965-08-03 | 1966-02-02 | $7700.00 | Window Closed / Lapsed |