Patent US2558692A successfully refreshed from Google Patents.
US2558692A
Expired / Lapsed
US
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Combined rooter and trench forming plow
Assignee: PIPE LINE CONSTRUCTION AND DRI
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Filing: 1945-06-20
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Granted: 1951-06-26
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Expires: 1965-06-20
Abstract
No abstract record available.
Inventors
- 👤 Garland B Pace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:28
CPC Classifications
E; E02; E02F; E02F5/00; E02F5/02; E02F5/027
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-25 | 1954-12-25 | 1955-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-25 | 1958-12-25 | 1959-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-25 | 1962-12-25 | 1963-06-26 | $7700.00 | Window Closed / Lapsed |