Patent US2426073A successfully refreshed from Google Patents.
US2426073A
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US
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Piston device
Assignee: Westinghouse Air Brake Co
•
Filing: 1943-10-16
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Granted: 1947-08-19
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Expires: 1963-10-16
Abstract
No abstract record available.
Inventors
- 👤 Charles L Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:51
CPC Classifications
F; F16; F16N; F16N13/00; F16N13/02; F16N13/06; F16N13/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US504178A
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US597860A
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US764886A
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US829866A
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US1405375A
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US1287701A
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US1650091A
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US2151008A
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US2163399A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-18 | 1951-02-17 | 1951-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-18 | 1955-02-17 | 1955-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-18 | 1959-02-17 | 1959-08-19 | $7700.00 | Window Closed / Lapsed |