Patent US2198027A successfully refreshed from Google Patents.
US2198027A
Expired / Lapsed
US
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Brake ventilation control means
Assignee: Westinghouse Air Brake Co
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Filing: 1938-12-17
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Granted: 1940-04-23
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Expires: 1958-12-17
Abstract
No abstract record available.
Inventors
- 👤 Clyde C Farmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:06
CPC Classifications
B; B61; B61H; B61H5/00; B60; B60T; B60T1/00; B60T1/02; B60T1/04; F; F16; F16D; F16D55/00; F16D55/02; F16D55/22; F16D55/224; F16D55/2245; F16D65/00; F16D65/02; F16D65/12; F16D65/123; F16D65/124; F16D65/128
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-04-23 | 1943-10-23 | 1944-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-04-23 | 1947-10-23 | 1948-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-04-23 | 1951-10-23 | 1952-04-23 | $7700.00 | Window Closed / Lapsed |