US2822688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flowmeter
Assignee: Phillips Petroleum Co
•
Filing: 1955-01-24
•
Granted: 1958-02-11
•
Expires: 1975-01-24
Abstract
No abstract record available.
Inventors
- 👤 Bruce F Wiley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:06
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/10; G; G01; G01F; G01F1/00; G01F1/68
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2249751A
Cited
US2524150A
Cited
US2688872A
Cited
US2709365A
Cited
US2683274A
Cited
US2729102A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |