Patent US2429489A successfully refreshed from Google Patents.
US2429489A
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Unloading valve
Assignee: Borg Warner Corp
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Filing: 1943-08-23
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Granted: 1947-10-21
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Expires: 1963-08-23
Abstract
No abstract record available.
Inventors
- 👤 Jay M Roth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:44
CPC Classifications
F; F15; F15B; F15B1/00; F15B1/02; F15B1/027; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2622
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US559881A
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US615812A
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US738161A
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US726841A
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US1110567A
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US1636561A
Cited
US1991227A
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US2210295A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-20 | 1951-04-21 | 1951-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-20 | 1955-04-21 | 1955-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-20 | 1959-04-21 | 1959-10-21 | $7700.00 | Window Closed / Lapsed |