Patent US3339546A successfully refreshed from Google Patents.
US3050997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flowmeters
Assignee: National Research Development Corp UK
•
Filing: 1959-06-03
•
Granted: 1962-08-28
•
Expires: 1979-06-03
Abstract
No abstract record available.
Inventors
- 👤 Lake David Brian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:46
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/66
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2669121A
Cited
US2844961A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-27 | 1966-02-26 | 1966-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-27 | 1970-02-26 | 1970-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-27 | 1974-02-26 | 1974-08-28 | $7700.00 | Window Closed / Lapsed |