US2153254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means of measuring fluid flow
Assignee: Individual
•
Filing: 1936-11-20
•
Granted: 1939-04-04
•
Expires: 1956-11-20
Abstract
No abstract record available.
Inventors
- 👤 Mordica O Johnston
- 👤 Christian W Savitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:44
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/66; G01F1/666; E; E21; E21B; E21B47/00; E21B47/10; E21B47/107
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-04-03 | 1942-10-03 | 1943-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-04-03 | 1946-10-03 | 1947-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-04-03 | 1950-10-03 | 1951-04-04 | $7700.00 | Window Closed / Lapsed |