US3389601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable capacitance liquid flow gauge
Assignee: AT&T Inc
•
Filing: 1966-06-29
•
Granted: 1968-06-25
•
Expires: 1986-06-29
Abstract
No abstract record available.
Inventors
- 👤 Ralph A Semplak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:30
CPC Classifications
G; G01; G01W; G01W1/00; G01W1/14; G01F; G01F1/00; G01F1/56; G01F1/64
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2213888A
Cited
US2304593A
Cited
US2485148A
Cited
US3269180A
Cited
US3320528A
Cited
US3188865A
Cited
US3335344A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-25 | 1971-12-25 | 1972-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-25 | 1975-12-25 | 1976-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-25 | 1979-12-25 | 1980-06-25 | $7700.00 | Window Closed / Lapsed |