US2797755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Junk basket with positive fluid circulation
Assignee: Phillips Petroleum Co
•
Filing: 1953-10-05
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Granted: 1957-07-02
•
Expires: 1973-10-05
Abstract
No abstract record available.
Inventors
- 👤 Roy A Bobo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:11
CPC Classifications
E; E21; E21B; E21B27/00; E21B27/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1895610A
Cited
US2072627A
Cited
US2609182A
Cited
US2485098A
Cited
US2645290A
Cited
US2670800A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-01 | 1960-12-31 | 1961-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-01 | 1964-12-31 | 1965-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-01 | 1968-12-31 | 1969-07-02 | $7700.00 | Window Closed / Lapsed |