Patent US3284630A successfully refreshed from Google Patents.
US3284630A
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US
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Means for determining fluid interface in underground storage space
Assignee: Phillips Petroleum Co
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Filing: 1963-05-07
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Granted: 1966-11-08
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Expires: 1983-05-07
Abstract
No abstract record available.
Inventors
- 👤 Ernest L Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:29
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/28; G01F23/284; G01F23/288
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2493536A
Cited
US2963588A
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US2942112A
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US2972679A
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US3052798A
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US3065346A
Cited
US3127511A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |