US2443809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-direction flow equalizer
Assignee: Borg Warner Corp
•
Filing: 1943-03-18
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Granted: 1948-06-22
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Expires: 1963-03-18
Abstract
No abstract record available.
Inventors
- 👤 Howard G Terbeek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:15
CPC Classifications
B; B64; B64C; B64C25/00; B64C25/02; B64C25/08; B64C25/10; B64C25/18; B64C25/22; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2521; Y10T137/2529
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1999834A
Cited
GB492669A
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US2291578A
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US2343912A
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US2279693A
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US2266921A
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US2301122A
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US2311336A
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US2387007A
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US2386219A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-22 | 1951-12-22 | 1952-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-22 | 1955-12-22 | 1956-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-22 | 1959-12-22 | 1960-06-22 | $7700.00 | Window Closed / Lapsed |