Patent US2977795A successfully refreshed from Google Patents.
US2977795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid metering system
Assignee: Pan American Petroleum Corp
•
Filing: 1956-08-09
•
Granted: 1961-04-04
•
Expires: 1976-08-09
Abstract
No abstract record available.
Inventors
- 👤 Ralph W Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:08
CPC Classifications
G; G01; G01F; G01F3/00; G01F3/36; G01F3/38; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7303
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2773556A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |