Patent US2930197A successfully refreshed from Google Patents.
US2930197A
Expired / Lapsed
US
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Underground storage of high pressure petroleum gases
Assignee: Phillips Petroleum Co
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Filing: 1954-11-12
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Granted: 1960-03-29
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Expires: 1974-11-12
Abstract
No abstract record available.
Inventors
- 👤 Paul G Carpenter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:50
CPC Classifications
B; B65; B65G; B65G5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA459044A
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USRE24318E
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US1921358A
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US2042439A
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US2166914A
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US2293196A
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US2327187A
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US2378077A
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US2424722A
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US2659209A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |