US2457297A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid meter
Assignee: Sheffield Corp
•
Filing: 1944-11-10
•
Granted: 1948-12-28
•
Expires: 1964-11-10
Abstract
No abstract record available.
Inventors
- 👤 Aller Willis Fay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:54
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/20; G01F1/22; G01B; G01B13/00; Y; Y10; Y10S; Y10S33/00; Y10S33/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE341786C
Cited
US828108A
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DE304890C
Cited
US2130981A
Cited
US2258023A
Cited
US2254259A
Cited
US2311375A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-28 | 1952-06-28 | 1952-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-28 | 1956-06-28 | 1956-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-28 | 1960-06-28 | 1960-12-28 | $7700.00 | Window Closed / Lapsed |