US2800644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric checking apparatus
Assignee: Westinghouse Air Brake Co
•
Filing: 1954-06-30
•
Granted: 1957-07-23
•
Expires: 1974-06-30
Abstract
No abstract record available.
Inventors
- 👤 Claude M Hines
- 👤 Everett P Sexton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:52
CPC Classifications
B; B60; B60T; B60T17/00; B60T17/18; B60T17/22; B60T17/228; B60L; B60L15/00; B60L15/20; B60T13/00; B60T13/10; B60T13/66; B60T13/665; B60T13/68; B60L2200/00; B60L2200/26; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/64; Y02T10/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2082143A
Cited
US2302061A
Cited
US2460789A
Cited
US2640978A
Cited
US2643370A
Cited
US2611032A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-22 | 1961-01-21 | 1961-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-22 | 1965-01-21 | 1965-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-22 | 1969-01-21 | 1969-07-23 | $7700.00 | Window Closed / Lapsed |