US2927301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measurement of liquid levels in wells
Assignee: BP PLC
•
Filing: 1954-06-08
•
Granted: 1960-03-01
•
Expires: 1974-06-08
Abstract
No abstract record available.
Inventors
- 👤 Booth Sydney Edward
- 👤 Ward Eric Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:54
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/28; G01F23/296; E; E21; E21B; E21B47/00; E21B47/04; E21B47/047; Y; Y10; Y10S; Y10S367/00; Y10S367/908
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1468305A
Cited
US2232476A
Cited
US2281301A
Cited
US2324340A
Cited
GB644288A
Cited
US2403535A
Cited
US2522433A
Cited
US2600967A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-01 | 1963-08-31 | 1964-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-01 | 1967-08-31 | 1968-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-01 | 1971-08-31 | 1972-03-01 | $7700.00 | Window Closed / Lapsed |