Patent US2901609A successfully refreshed from Google Patents.
US2901609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differentiator
Assignee: Westinghouse Air Brake Co
•
Filing: 1956-05-02
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Granted: 1959-08-25
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Expires: 1976-05-02
Abstract
No abstract record available.
Inventors
- 👤 Richard D Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:34
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/35; G01S7/352; G06; G06G; G06G7/00; G06G7/12; G06G7/18; G06G7/184; G06G7/186
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2412227A
Cited
US2324797A
Cited
US2562792A
Cited
US2459046A
Cited
US2666135A
Cited
US2773641A
Cited
FR1108111A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |