US2426064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pressure control mechanism
Assignee: Westinghouse Air Brake Co
•
Filing: 1943-07-01
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Granted: 1947-08-19
•
Expires: 1963-07-01
Abstract
No abstract record available.
Inventors
- 👤 Roy R Stevens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:45
CPC Classifications
B; B63; B63H; B63H21/00; B63H21/22; B63H21/21; B63H21/213; F; F15; F15B; F15B11/00; F15B11/16; F15B9/00; F15B9/02; F15B9/08; F15B9/12; B63H23/00; B63H23/02; B63H23/08; B63H23/30; F15B2211/00; F15B2211/40; F15B2211/405; F15B2211/40576; F15B2211/40584; Y; Y10; Y10S; Y10S74/00; Y10S74/01; Y10S74/02; Y10S74/08; Y10T; Y10T74/00; Y10T74/20; Y10T74/20012
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB267890A
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GB306788A
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US1858999A
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US2056006A
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US2099422A
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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 |