US2667895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetically biased check valve
Assignee: International Motors LLC
•
Filing: 1950-11-17
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Granted: 1954-02-02
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Expires: 1970-11-17
Abstract
No abstract record available.
Inventors
- 👤 Stuart D Pool
- 👤 Elof K Karlsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:54
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/021; F16K31/00; F16K31/02; F16K31/06; F16K31/08; F16K31/084; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904
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) | 1957-02-01 | 1957-08-03 | 1958-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-01 | 1961-08-03 | 1962-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-01 | 1965-08-03 | 1966-02-02 | $7700.00 | Window Closed / Lapsed |