US2883833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underground storage system and method of operating
Assignee: Phillips Petroleum Co
•
Filing: 1954-01-22
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Granted: 1959-04-28
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Expires: 1974-01-22
Abstract
No abstract record available.
Inventors
- 👤 Elburt S Miles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:29
CPC Classifications
E; E21; E21B; E21B41/00; E21B41/005; E21B41/0057; E21B41/0064; B; B65; B65G; B65G5/00; Y; Y02; Y02C; Y02C20/00; Y02C20/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |