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US3392464A
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Road widening trencher-loader unit
Assignee: Westinghouse Air Brake Co
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Filing: 1965-06-25
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Granted: 1968-07-16
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Expires: 1985-06-25
Abstract
No abstract record available.
Inventors
- 👤 Raymore D Macdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:04
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/7695
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3308563A
Cited
US771746A
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US2564486A
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US2696289A
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US2981012A
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US3245159A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-16 | 1972-01-15 | 1972-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-16 | 1976-01-15 | 1976-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-16 | 1980-01-15 | 1980-07-16 | $7700.00 | Window Closed / Lapsed |