Patent US2871668A successfully refreshed from Google Patents.
US2871668A
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Underground storage
Assignee: Phillips Petroleum Co
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Filing: 1955-11-21
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Granted: 1959-02-03
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Expires: 1975-11-21
Abstract
No abstract record available.
Inventors
- 👤 Edwin E Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:48
CPC Classifications
F; F17; F17C; F17C3/00; F17C3/005; B; B65; B65G; B65G5/00; F17C2201/00; F17C2201/05; F17C2201/052; F17C2221/00; F17C2221/03; F17C2221/032; F17C2221/033; F17C2221/035; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/0161; F17C2223/03; F17C2223/033; F17C2227/00; F17C2227/03; F17C2227/0337; F17C2227/0339; F17C2250/00; F17C2250/06; F17C2250/0605; F17C2250/061; F17C2260/00; F17C2260/02; F17C2260/021; F17C2265/00; F17C2265/01; F17C2265/015; F17C2265/017; F17C2265/03; F17C2265/032; F17C2265/033; F17C2265/034; F17C2265/037; F17C2270/00; F17C2270/01; F17C2270/0142; F17C2270/0144; F17C2270/0147; F17C2270/0157; F17C2270/016
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1371427A
Cited
US1718312A
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US2532074A
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US2550886A
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US2659209A
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US2713775A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-02 | 1962-08-04 | 1963-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-02 | 1966-08-04 | 1967-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-02 | 1970-08-04 | 1971-02-03 | $7700.00 | Window Closed / Lapsed |