US2922439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Limit valve
Assignee: Emerson Electric Co
•
Filing: 1955-02-23
•
Granted: 1960-01-26
•
Expires: 1975-02-23
Abstract
No abstract record available.
Inventors
- 👤 John A Palmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:55
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/20; F15B15/24; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87265; Y10T137/87338
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2067492A
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US2247141A
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GB552832A
Cited
US2447968A
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US2475298A
Cited
US2540467A
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US2523665A
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US2757641A
Cited
US2705971A
Cited
US2710628A
Cited
US2826258A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-25 | 1963-07-27 | 1964-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-25 | 1967-07-27 | 1968-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-25 | 1971-07-27 | 1972-01-26 | $7700.00 | Window Closed / Lapsed |