US2971084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control circuit arrangement for speed measuring apparatus
Assignee: Westinghouse Air Brake Co
•
Filing: 1956-02-14
•
Granted: 1961-02-07
•
Expires: 1976-02-14
Abstract
No abstract record available.
Inventors
- 👤 Mishelevich Benjamin
- 👤 Tsiang Sih Hsuin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:31
CPC Classifications
B; B61; B61L; B61L17/00; B61L17/02; B61L17/023; B61L25/00; B61L25/02; B61L25/021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1766539A
Cited
US2047679A
Cited
US1981487A
Cited
US2206550A
Cited
US2477567A
Cited
US2700728A
Cited
US2690238A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-07 | 1964-08-08 | 1965-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-07 | 1968-08-08 | 1969-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-07 | 1972-08-08 | 1973-02-07 | $7700.00 | Window Closed / Lapsed |