US2573442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit integrity indicating system
Assignee: Westinghouse Air Brake Co
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Filing: 1949-07-02
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Granted: 1951-10-30
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Expires: 1969-07-02
Abstract
No abstract record available.
Inventors
- 👤 Claude M Hines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:11
CPC Classifications
B; B60; B60T; B60T13/00; B60T13/10; B60T13/66; B60T13/665; B60T17/00; B60T17/18; B60T17/22; B60T17/228
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-29 | 1955-04-30 | 1955-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-29 | 1959-04-30 | 1959-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-29 | 1963-04-30 | 1963-10-30 | $7700.00 | Window Closed / Lapsed |