Patent US3457403A successfully refreshed from Google Patents.
US3457403A
Expired / Lapsed
US
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Motion control system for rapid transit vehicles
Assignee: Westinghouse Air Brake Co
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Filing: 1966-02-15
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Granted: 1969-07-22
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Expires: 1986-02-15
Abstract
No abstract record available.
Inventors
- 👤 Blanchard D Smith Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:36
CPC Classifications
B; B61; B61L; B61L3/00; B61L3/02; B61L3/08; B61L3/12; B61L3/121; B61L15/00; B61L15/0062
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3218454A
Cited
US3041448A
Cited
GB972859A
Cited
GB978559A
Cited
US3245728A
Cited
US3270199A
Cited
US3297867A
Cited
US3334224A
Cited
US3363096A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |