US2811128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid indicator for tubing
Assignee: Imperial Brass Manufacturing Co
•
Filing: 1955-03-31
•
Granted: 1957-10-29
•
Expires: 1975-03-31
Abstract
No abstract record available.
Inventors
- 👤 George E Franck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:07
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/02; G01P; G01P13/00; G01P13/008; F; F16; F16L; F16L2101/00; F16L2101/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |