US2956576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for sensing the rate of change of flow of liquids
Assignee: Napier Turbochargers Ltd
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Filing: 1957-06-04
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Granted: 1960-10-18
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Expires: 1977-06-04
Abstract
No abstract record available.
Inventors
- 👤 William A Mckeggie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:40
CPC Classifications
G; G05; G05D; G05D7/00; G05D7/01; G05D7/0126; F; F02; F02C; F02C9/00; F02C9/26; F16; F16K; F16K17/00; F16K17/20; F16K17/22; F16K17/32; F16K31/00; G01; G01F; G01F1/00; G01F1/05; G01F1/34; G01F1/36; G01F1/38; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2521; Y10T137/7722; Y10T137/7758; Y10T137/7759
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |