US3427940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tow-type two-wheeled vibratory trench roller apparatus
Assignee: Westinghouse Air Brake Co
•
Filing: 1966-09-15
•
Granted: 1969-02-18
•
Expires: 1986-09-15
Abstract
No abstract record available.
Inventors
- 👤 Raymore D Macdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:54
CPC Classifications
E; E02; E02D; E02D3/00; E02D3/02; E02D3/026; E02D3/032; E01; E01C; E01C19/00; E01C19/22; E01C19/23; E01C19/28; E01C19/285
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2197395A
Cited
US2240236A
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US2639652A
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US2682153A
Cited
US2685777A
Cited
US2728277A
Cited
US3146686A
Cited
US3257918A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |