Patent US2622618A successfully refreshed from Google Patents.
US2622618A
Expired / Lapsed
US
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Electromagnetically controlled valve
Assignee: United Aircraft Products Inc
•
Filing: 1949-01-21
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Granted: 1952-12-23
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Expires: 1969-01-21
Abstract
No abstract record available.
Inventors
- 👤 Edwin I Ghormley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:28
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/40; F16K31/406; F16K31/408
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1157870A
Cited
US1807191A
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US2204808A
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US2296713A
Cited
US2294702A
Cited
US2345306A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-23 | 1956-06-23 | 1956-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-23 | 1960-06-23 | 1960-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-23 | 1964-06-23 | 1964-12-23 | $7700.00 | Window Closed / Lapsed |