Patent US2647331A successfully refreshed from Google Patents.
US2647331A
Expired / Lapsed
US
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Combination crane and bulldozer
Assignee: Koehring Co
•
Filing: 1946-08-19
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Granted: 1953-08-04
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Expires: 1966-08-19
Abstract
No abstract record available.
Inventors
- 👤 Ervin A Brugger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:53
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/96; E02F3/961
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1233840A
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US1509295A
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US1572228A
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US2239943A
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US2275391A
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US2301808A
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US2404926A
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US2446220A
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US2387764A
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US2502681A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |