Patent US2790071A successfully refreshed from Google Patents.
US2790071A
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US
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Vehicle reporting systems
Assignee: Westinghouse Air Brake Co
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Filing: 1951-10-17
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Granted: 1957-04-23
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Expires: 1971-10-17
Abstract
No abstract record available.
Inventors
- 👤 David L Gunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:52
CPC Classifications
B; B61; B61L; B61L25/00; B61L25/02; B61L25/04; H; H04; H04B; H04B5/00; H04B5/20; H04B5/24; H04B5/26; H04B5/266
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1242877A
Cited
US1742617A
Cited
US1770705A
Cited
US2122358A
Cited
US2554056A
Cited
US2670434A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-22 | 1960-10-22 | 1961-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-22 | 1964-10-22 | 1965-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-22 | 1968-10-22 | 1969-04-23 | $7700.00 | Window Closed / Lapsed |