US2667896A
Expired / Lapsed
US
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Unloading valve
Assignee: Borg Warner Corp
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Filing: 1950-10-20
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Granted: 1954-02-02
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Expires: 1970-10-20
Abstract
No abstract record available.
Inventors
- 👤 John A Kanuch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:52
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/164; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7723; Y10T137/7731; Y10T137/7837; Y10T137/7838; Y10T137/7842; Y10T137/8593; Y10T137/87265; Y10T137/87499; Y10T137/87917; Y10T137/87981; Y10T137/88038; Y10T137/88046
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 |