Patent US3005978A successfully refreshed from Google Patents.
US2934754A
Expired / Lapsed
US
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Code converters
Assignee: Westinghouse Air Brake Co
•
Filing: 1957-02-26
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Granted: 1960-04-26
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Expires: 1977-02-26
Abstract
No abstract record available.
Inventors
- 👤 Arthur P Jackel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:08
CPC Classifications
H; H03; H03M; H03M7/00; H03M7/14; H03M7/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2147656A
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US2444042A
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US2679644A
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US2685084A
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US2714204A
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US2839740A
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US2860327A
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US2876444A
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US2872114A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |