US2842962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure differential producing device
Assignee: Elster Metering Holdings Ltd
•
Filing: 1954-10-25
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Granted: 1958-07-15
•
Expires: 1974-10-25
Abstract
No abstract record available.
Inventors
- 👤 Dall Horace Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:55
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/34; G01F1/36; G01F1/40; G01F1/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2704555A
Cited
US1559547A
Cited
US1480661A
Cited
US1882062A
Cited
US1785501A
Cited
GB332116A
Cited
US2127501A
Cited
GB689474A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |