Patent US3021867A successfully refreshed from Google Patents.
US3021867A
Expired / Lapsed
US
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Grounding system for light oil loading stations
Assignee: Sinclair Refining Co
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Filing: 1959-04-06
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Granted: 1962-02-20
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Expires: 1979-04-06
Abstract
No abstract record available.
Inventors
- 👤 James E Gallagher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:22
CPC Classifications
B; B67; B67D; B67D7/00; B67D7/002; B67D7/06; B67D7/32; B67D7/3236; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/85978; Y10T137/85986; Y10T137/86027; Y10T137/8807
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) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |