US2981240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid flow meters
Assignee: Individual
•
Filing: 1960-01-29
•
Granted: 1961-04-25
•
Expires: 1980-01-29
Abstract
No abstract record available.
Inventors
- 👤 Robert E Nelson
- 👤 George E Tench
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:53
CPC Classifications
G; G01; G01F; G01F3/00; G01F3/02; G01F3/04; G01F3/14; G01F3/16; G01F3/18; G01F15/00; G01F15/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US474241A
Cited
US1666107A
Cited
US1675337A
Cited
US1999362A
Cited
US2255219A
Cited
US2678029A
Cited
US2860513A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |