US3004528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railway traffic controlling apparatus
Assignee: Westinghouse Air Brake Co
•
Filing: 1959-06-26
•
Granted: 1961-10-17
•
Expires: 1979-06-26
Abstract
No abstract record available.
Inventors
- 👤 Jr John W Logan
- 👤 Rankin J Bush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:08
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/0401; F15B13/0402; B; B61; B61K; B61K7/00; B61K7/02; B61K7/12; B61L; B61L17/00; B61L5/00; B61L5/04; B61L5/045; F15B13/042; F15B13/043; F15B13/0431; F15B15/00; F15B15/08; F15B15/14; F15B15/1423; F15B15/1433; F15B15/149; F15B15/20; F15B15/202; F16; F16K; F16K31/00; F16K31/12; F16K31/42; F16K31/423; F16K31/426; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582; Y10T137/86614
Claims Analysis
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References Cited (Backward Citations)
US2409517A
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US2658523A
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US2752895A
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US2692964A
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US2692354A
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US2821997A
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US2853976A
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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) | 1964-10-16 | 1965-04-17 | 1965-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-16 | 1969-04-17 | 1969-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-16 | 1973-04-17 | 1973-10-17 | $7700.00 | Window Closed / Lapsed |