Patent US3473380A successfully refreshed from Google Patents.
US3473380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid level measuring apparatus
Assignee: Sunoco Inc
•
Filing: 1967-12-28
•
Granted: 1969-10-21
•
Expires: 1987-12-28
Abstract
No abstract record available.
Inventors
- 👤 Robert Mayer
- 👤 Elbert N Shawhan
- 👤 Einar T Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:55
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/24; G01F23/245
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2683371A
Cited
US2691223A
Cited
US2682026A
Cited
US3049920A
Cited
US3148542A
Cited
US3128557A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |