US2869071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for measuring electrical conductivity of fluids
Assignee: Individual
•
Filing: 1956-10-29
•
Granted: 1959-01-13
•
Expires: 1976-10-29
Abstract
No abstract record available.
Inventors
- 👤 Gerald L Esterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:18
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2542075A
Cited
US2659234A
Cited
US2674719A
Cited
US2709785A
Cited
US2749509A
Cited
US2697191A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-12 | 1962-07-14 | 1963-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-12 | 1966-07-14 | 1967-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-12 | 1970-07-14 | 1971-01-13 | $7700.00 | Window Closed / Lapsed |