Patent US2620814A successfully refreshed from Google Patents.
US2620814A
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Centrifugally actuated fluid control valve
Assignee: Hobbs Transmission Ltd
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Filing: 1948-02-19
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Granted: 1952-12-09
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Expires: 1968-02-19
Abstract
No abstract record available.
Inventors
- 👤 Hobbs Howard Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:48
CPC Classifications
F; F16; F16D; F16D43/00; F16D43/28; F16D43/284; Y; Y10; Y10T; Y10T137/00; Y10T137/0971; Y10T137/108; Y10T137/1135
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE643678C
Cited
US2163203A
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US2440589A
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US2325814A
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US2328091A
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US2328092A
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US2275204A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |