US2963121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Houses
Assignee: Westinghouse Air Brake Co
•
Filing: 1956-04-05
•
Granted: 1960-12-06
•
Expires: 1976-04-05
Abstract
No abstract record available.
Inventors
- 👤 Richard I Felver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:38
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/18; E04B1/24; E04H; E04H1/00; E04H1/12; E04B2001/2481; E04B2001/249
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA477583A
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US17256A
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US824170A
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US847327A
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US851927A
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US1052960A
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US1485972A
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US1637960A
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US2007354A
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US2078969A
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US2270161A
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US2247893A
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GB594773A
Cited
US2621429A
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US2683903A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-06 | 1964-06-06 | 1964-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-06 | 1968-06-06 | 1968-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-06 | 1972-06-06 | 1972-12-06 | $7700.00 | Window Closed / Lapsed |